Cycad cone

Cycas, Male and Female Cones, Leaves, Pinus, Seed, Stem. What is Cycas. Cycus is a genus with short, palm-like trees commonly called cycads. It belongs to the division Cycadophyta. Cycads are believed to have evolved in Permian, 280 million years ago. So far, about 305 species of cycads have been identified all over the world.

Such early interactions have been exemplified by a Middle Triassic cycad cone that contains pollen-laden coprolites possibly produced by beetles [28]. This find provides the earliest evidence for a cycad-insect interaction, illuminating the early stage in the establishment of complex entomophily in cycads [28].What do Cycads look like? Although they look like ferns, cycads are a closer relative to conifers. Both bear their seeds in cones and have separate male and female plants. If you have a female cycad plant in your garden (the most popular are Macrozamia and Cycas) it may display a large cone in April, chock full of brilliant orange or red shiny ...Well, I'll never thought you could ID a Cycad with cones alone! Try this one for size and see how easy it really is! Check out the photo and we'll update it ...The 10th International Conference on Cycad Biology (Cycad 2015), taking place between August 16th and August 21st, 2020, was very well-attended and truly international in scope, with over 150 ...Bennettitales (also known as cycadeoids) is an extinct order of seed plants that first appeared in the Permian period and became extinct in most areas toward the end of the Cretaceous.Bennettitales were amongst the most common seed plants of the Mesozoic, and had morphologies including shrub and cycad-like forms.The foliage of …Cone diameter: 30cm. Cone height: 15cm. Price: R1,800.00. Inventory number: 522. Africa Cycads is a supplier of cycads in South Africa. Find information on cycad species and how to acquire these rare plants.Cycas revoluta, commonly known as the Sago Palm or King Sago Palm, is a cycad species native to Japan. Like other cycads, it reproduces through the production of seed cones, which are the structures involved in the formation and dispersal of seeds. Here's an explanation of the seed cones of Cycas revoluta: General Characteristics: Seed cones ...Exclusive Cycads' retail nursery is located in the northern suburbs of Pretoria, Gauteng. It boasts a stunning landscaped garden with an exquisite collection of rare and endangered cycads. ... The cone can be cut off, but we have better results with cutting the stem of the cone out and treating the plant immediately with a fungicide. The cone ...

Successful cycad reproduction requires these brood-site mutualists to leave the host pollen cone and transfer pollen to a female ovulate cone. Over the course of a day, pollination-stage cones produce a predictable thermogenic and volatile pattern ( 7 ).Common names: Maputaland cycad, Zululand cycad, Tongaland cycad (Eng.), Maputalandbroodboom, Tongalandbroodboom (Afr.), umthobane, uthobani (Zulu), chihanga (Thonga) ... Occasionally golden yellow cones may be found. The male and female cones are borne on separate plants and while both colourful, are quite different from each other …One of the tallest cycads in the world, Dioon spinulosum (Giant Dioon) is an elegant, palm-like, evergreen cycad with an open rosette of perfectly arranged, blue-green, pinnate fronds, up to 6 ft. long (180 cm). They radiate out from the trunk and arch with grace. Borne atop a short stocky trunk, up to 16 in. wide (40 cm), the leaves are divided into up to 120-240 narrow leaflets, armed with ... Cycads. (Phylum Cycadophyta) The cycads date back 250 million years. They have palm-like leaves, short, usually unbranched stems, massive cones and they are unisexual. There are 11 genera with 200 species found in tropical to semi-tropical areas around the world, often as fairly small populations. Their handsome palm-like foliage has made them ...Macrozamia communis is an Australian cycad found on the east coast of New South Wales. The common name for the species is burrawang, a word derived from the Daruk Australian Aboriginal language; this name is also often applied to other species of Macrozamia . The burrawang has the most extensive distribution of any cycad in New South Wales and ...14 Agu 2020 ... However, all the known cycad pollinators are phytophagous insects that mate, breed, and feed on cycads and have varying levels of host speciï¬?Consisting of 60 species, Zamia is a varied genus of the cycad family found in Florida, Caribbean area and tropical South America. Zamia integrifolia L.f. ( Z. floridana) is a shrub-like herb with a fleshy underground stem. In the US it is native to the States of Florida and Georgia. It prefers well-drained, sandy, moist soils with or without ...

No other blue-leaved cycad rivals the intense blue of this cycad's foliage. The very attractive colouring and rigid curling of the leaves, gives it a rather unique look. Both sexes bear a single cone per crown, males occasionally two in December - January. Mature cones are bluish green in colour, the male more blue than the female.They may look alike, but palms and cycads represent two very different groups of plants. Of the two, palms are far more diverse, while cycads are far more ancient. Palms have flowers while cycads are cone bearing like pine trees. Both are widespread throughout the world and are grown extensively for their beauty and even as a food source.Cycad. Cycads (division Cycadophyta) are an ancient group of seed plants characterized by a large crown of compound leaves and a stout, erect trunk up to seven meters (23 feet) high. They are evergreen, gymnospermous, dioecious (separate male and female) plants having large pinnately compound leaves. They are frequently confused with and ...As part of an in-depth study of obligate nursery pollination of cycads, we find that Rhopalotria furfuracea weevils show a strong physiological response and behavioral orientation to the cone humidity of the host plant Zamia furfuracea in an equally sensitive manner to their responses to Z. furfuracea -produced cone volatiles.

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Often these microsporophylls look surprisingly like individual segments of pine cones. Cycads are unusual in that they generate both heat and strong, alluring odors in the microsporangia which are methods of drawing insects to investigate and distribute pollen. Dr. Irene Terry et al. (2) have reported that the temperature of a megasporangium ...Gymnosperms are plants producing seeds that are not encapsulated within the fruit or the ovary. Gymnosperm seeds are open to the air and directly pollinated. Although it is less frequently used, acrogymnospermae can also be used to refer to gymnosperms. It refers to a wide variety of plants, such as conifers, ginkgos, cycads, and gnetophytes.Pharaxonotha may inhabit cycad cones in the New World with other beetle genera, including Ceratophila Tang, Skelley and Perez-Farrera (Erotylidae: Pharaxonothinae) in the cycad host Ceratozamia ...The microgametophytes are formed within the microsporangia of the microstrobilus, or pollen cone. These structures are all diploid. Within the microsporangium, there are microsporocytes, diploid cells that undergo meiosis to become haploid gametophytes. Figure 22.5.1 22.5. 1: Microsporangium in a pollen cone.Cycas revoluta ( Sotetsu [Japanese ソテツ ], sago palm, king sago, sago cycad, Japanese sago palm) is a species of gymnosperm in the family Cycadaceae, native to southern Japan including the Ryukyu Islands. It is one of several species used for the production of sago, as well as an ornamental plant. The sago cycad can be distinguished by a ... cycads are a very ancient lineage of plants with a fossil record that extends back at least 280 million years. They were once very common across most of the planet and were a promi- nent plant group in the age of the dinosaurs, but they have since retreated to the tropics and sub-tropics.

In cycads, pollen cones and seed cones are borne on different plants. Cycads synthesize neurotoxins, especially in the seeds, that are effective against most animals, including humans. On the Pacific island of Guam, large herbivorous bats called "flying foxes" commonly feed on cycad seeds, a potent source of neurotoxins. The flying foxes do not ...the pollen cones of all cycad genera consist of a peduncle and a cone axis surrounded by spirally arranged microsporophylls which carry pollen-bearing sac-like structures known as microsporangia.1. Cycas revoluta (Sago Palm) Perhaps the best known cycad species is Cycas revoluta, known as the sago palm.Despite not bearing any genetic match to palm trees, there are so many visual likenesses that it is often used as a direct alternative in low-maintenance gardens, or indoor spaces for its slower growth and more controllable form.Cycads (Cycadales) are among the most ancient lineages of extant seed-bearing plants and are the most threatened plant order on Earth, with circa 75% of the 356 accepted species endangered or threatened with extinction. Zamia is the most species-rich (81 spp.) and widely distributed cycad genus in the Americas, notable for its morphological and ecological diversity. Across the genus, there ...5 Agu 2019 ... A Cycad (Cycas revoluta) has produced a male cone at Ventnor Botanic Garden. This is the second time this has happened out of doors in the ...Cycads in the Zamiaceae are well known for their host-specific insect pollination mutualisms. Pollination of Cycas in the sister family Cycadaceae is less well-documented, with beetle pollination possibly coexisting with a limited potential for wind pollination, a hypothesis we tested for C. ophiolitica in Central Queensland, Australia. Cones were associated with three species of beetle: an ...Cycad Cones Their Beauty and Diversity This page is dedicated to the beauty and diversity of Cycad cones. Cycads are gymnosperms which puts them in the same plant group which includes pine trees. All cycads are dioeceous, which means plants are either male of female, unlike many flowering plants which have booth sex parts on the same flower.This review article on Cycas revoluta mainly comprehensively summarizes characterization, morphology, distribution, traditional uses, phytochemical constituents and biological activities of isolated individual constituents as well as plant extract. Cycas revoluta is commonly known as Sago palm which belongs to gymnosperm species, cycadaceae family and has been used as a traditional medicine to ...

Cycad Leaf Flushes & Cones. A selection of pictures of emerging leaves from cycads in Montgomery Botanical ...

mature male cones (Zamia neurophyllidia) and female cones (Zamia vasquezii) Open male cone (Zamia integrifolia); Ripe Zamia integrifolia cone (photo MotherNature4) As a group, Zamias are some of the least drought and cold tolerant of the cycads, though there are exceptions, of course. Zamia furfuracea leaves fried by 25F frost in my gardenAll cycads have pollen cones or strobili (also called male cones/strobili). Recall that cones are determinate shoot systems, consisting of a single axis that bears sporophylls, modified leaves with attached sporangia.Pollen cones (Figures 5.14A,C; 5.16A,B,G) consist of an axis bearing microsporophylls, each of which bears numerous microsporangia (Figure 5.14D).produce cones full of pollen. Many of the cones on cycads are highly ornamental, like the bright red cones of Encephalartos ferox (see below). One of the reasons that cycads have survived for so long is that they can grow in harsh conditions. Many cycads naturally grow in pure sand or even on bare rock. Some can withstand hard freezesDownload Female Encephalartos lehmannii cycad cone close-up Stock Photo and explore similar images at Adobe Stock.female cone of sago cycad, Cycas revoluta Maturing female cone or strobilus of sago cycad, Cycas revoluta, opening up as seeds (small beige spheres between beige leaves) begin to form. Seeds will be several times larger turn red when mature.Cyanogenic Glycosides in Nuts and Seeds. Daniel J. Ballhorn, in Nuts and Seeds in Health and Disease Prevention, 2011 Cycad seeds. Cycas plants belong to the order Cycadales (family Cycadaceae), which consists of 11 genera of tropical and subtropical plants that produce terminal oblong cones containing orange-yellow seeds. The cycads are slow-growing dioecious (species with individuals that are either male or female) gymnosperms, the microsporangia (potential pollen) and megasporangia (potential ovules) occurring on different individual sporophytes. In all cycads except the genus Cycas, the ovules are borne on megasporophylls in megastrobili; in Cycas the ovules develop on individual …Aug 26, 2019 · For the cycads to reproduce, seeds released by the male cone must make their way to plants that produce female cones. In the U.K., this usually happens manually in indoor locations—the climate ...

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PDF | On Jan 1, 2014, Christian Schulz and others published Male Cone Evolution in Conifers : Not All That Simple | Find, read and cite all the research you need on ResearchGateThe adult pollinators must find a male cycad cone in order to participate in regeneration of the next generation. Similarly, the male and female cycad trees must attract the services of the ...Australian Native Plants - Cycads. Bowenia spectabilis. (Zamia Fern) Height. to 1.5m. The Zamia Fern is a cycad with smooth edged leaves growing straight from the underground tuber with about seven branches on mature leaf. The individual leaflets are in bipinnate arrangement around the stem. The fruit is pineapple shaped cone, with...Under a Creative Commons. Studies of the pollination ecology of the South African cycad, Encephalartos friderici-guilielmi Lehm, were carried out to determine the role played by insects and to identify the key pollinators. Surveys of insects on the male and female cones at the time of pollination indicated that three beetle species were present ...pollen cones of cycads are similar to seed cones, and pollen is born on the lower surface of scale-like structures. It is generally believed that in the ancestral type, cycads bore ovules directly on leaves. Over time, these fertile leaves evolved into a condensed and simplified form—the cycad cone. In Cycas, the leaflike structure was some- In the Florida cycad, or coontie (Zamia integrifolia), the reproductive cycle occurs over a period of about 14 months, cones first becoming visible in October, pollination occurring …There must be a male and female plant to produce seeds. Pollination occurs by insects or the wind. The male plant produces a pineapple-shaped cone that may grow up to 2 feet tall. The female plant produces a large golden rounded cone. If pollination is successful, the female will produce a packed seedhead. Pollination occurs from April to June.A new species of cycad allied to theC. circinalis group,Cycas pranburiensis, is described from the southeast karst area of Thailand near Pranburi, Prachuap Khiri Khan province. It is distinguished by its short leaves with broad, coriaceous leaflets and mostly unarmed petioles, and the extended, gently curved sterile apices of the microsporophylls. The cone beetle fauna of the new species ...pollen cones of cycads are similar to seed cones, and pollen is born on the lower surface of scale-like structures. It is generally believed that in the ancestral type, cycads bore ovules directly on leaves. Over time, these fertile leaves evolved into a condensed and simplified form—the cycad cone. In Cycas, the leaflike structure was some-Gymnosperms The term hosperm means naked seed. The ovules and seeds of gymnosperm are exposed on a cone scale or some other comparable structure. Most gymnosperms do produce cones. The four groups of gymnosperms are: Cycadophyta Cycads Gnctophyta: gnetophytes Ginkgophyta: ginkgoes Coniferophyta: conifers Cycads Cycads are cone-bearing, palmlike ... ….

Macrozamia communis. Macrozamia communis is an Australian cycad found on the east coast of New South Wales. The common name for the species is burrawang, a word derived from the Daruk Australian Aboriginal language; this name is also often applied to other species of Macrozamia . The burrawang has the most extensive distribution of any …Cones markedly dissimilar in shape and size. Male cones cylindrical; sporophylls arranged in a typical cone. Female cones loose and open; sporophylls arranged in a loose grouping surrounding the vegetative apex of the stem, with a linear stalk and an expanded apical lobe which may be entire, pinnatifid or deeply lobed on the margins.Cycas thouarsii, male cone Explaining today's cycads In contrast to the multitudinous angiosperms, modern cycads now include a total of 10 ac-cepted genera and 343 accepted species, di-Cycas male cone Maya + obj unknown: $59. $59. ma obj unknown Sale. details. close. XfrogPlants Cycadeoidea gigantea 3D Studio + fbx max c4d vue lxo obj ma lwo: $25 $ 17.50. $25 $ 17.50. 3ds fbx max c4d vue lxo obj ma lwo Sale. Collection. details. close. 2021 PBR Bushmans River Cycad - Encephalartos Altensteinii ...Snow cones are an ideal icy treat for parties or for a hot day. Here are some of the best snow cone machines that can help you to keep your customers happy. If you buy something through our links, we may earn money from our affiliate partne...Forest Cycad. Encephalartos villosus occurs from the East London vicinity, where it is found near the coast, to the northern border of Swaziland where it may grow as far as 100 km inland. As a result of its large geographical distribution, it is notably variable in leaf and cone shape. ... The male cones are lemon-yellow, 600-700 x 120-150 mm ...May 16, 2021 · What are Cycads? Cycad plants are hardy, evergreen gymnosperms (cone-bearing plants) that grow in sand or hard rock. Cycads are dioecious plants; there are separate male and female plants. The female plant produces seeds, and the male plant produces cones filled with pollen. The most popular cycad is the sago palm. Noteworthy Characteristics. Encephalartos horridus, commonly called ferocious blue cycad (also eastern cape blue cycad), is a slow-growing, small to medium-sized, evergreen blue cycad that is native to rocky outcroppings, slopes and ridges in Eastern Cape Province, South Africa.It is a small, palm-like, tropical plant that features pinnate, spiny, blue-green leaves and large seed cones.1. Cycas revoluta (Sago Palm) Perhaps the best known cycad species is Cycas revoluta, known as the sago palm.Despite not bearing any genetic match to palm trees, there are so many visual likenesses that it is often used as a direct alternative in low-maintenance gardens, or indoor spaces for its slower growth and more controllable form. Cycad cone, The sago palm (Cycas revoluta) is perhaps one of the best known cycads. Unlike others, the sago palm male cone is more striking than female cone (Figure 5). Other cycads with spectacular cones include giant dioon (Dioon spinulosum), Kozi cycad (Encephalartos ferox), chigua (Zamia roezlii), Micholitz's cycad (Cycas micholitzii), which are housed ..., 2.1 Plant materials. Zamia fairchildiana, Ceratozamia miqueliana, (Zamiaceae) and Cycas siamensis (Cycadaceae) were from the cycad collection at Montgomery Botanical Center, and Zamia pumila was from a private garden in Miami, FL. Miami is known for its subtropical climate that is similar to that in cycad habitats. Plants were grown outdoors for more than 10 years and they produce cones once a ..., Such early interactions have been exemplified by a Middle Triassic cycad cone that contains pollen-laden coprolites possibly produced by beetles [28]. This find provides the earliest evidence for a cycad-insect interaction, illuminating the early stage in the establishment of complex entomophily in cycads [28]., Both male and female cycads bear cones ( strobili ), somewhat similar to conifer cones . Cycads have been reported to fix nitrogen in association with various cyanobacteria living in the roots (the "coralloid" roots). [4] These photosynthetic bacteria produce a neurotoxin called BMAA that is found in the seeds of cycads. , Cycad, any of the palmlike woody gymnospermous plants that constitute the order Cycadales. The order consists of three extant families, which contain about 10 genera and about 310 species. Some cycads are used as ornamental conservatory plants and are cultivated outdoors in warm climates., What do Cycads look like? Although they look like ferns, cycads are a closer relative to conifers. Both bear their seeds in cones and have separate male and female plants. If you have a female cycad plant in your garden (the most popular are Macrozamia and Cycas) it may display a large cone in April, chock full of brilliant orange or red shiny ..., All cycads have pollen cones or strobili (also called male cones/strobili). Recall that cones are determinate shoot systems, consisting of a single axis that bears sporophylls, modified leaves with attached sporangia.Pollen cones (Figures 5.14A,C; 5.16A,B,G) consist of an axis bearing microsporophylls, each of which bears numerous microsporangia (Figure …, Other articles where sporophyll is discussed: cycadophyte: Sporophylls and strobili: Cycads are universally dioecious; that is, male and female reproductive structures are borne on different individual plants. Male plants produce pollen by leaf homologues called microsporophylls, and female plants produce ovules by leaf homologues known as …, Successful cycad reproduction requires these brood-site mutualists to leave the host pollen cone and transfer pollen to a female ovulate cone. Over the course of a day, pollination-stage cones produce a predictable thermogenic and volatile pattern ( 7 ). , Cycads are basically woody plants which have roots, a stem, leaves and reproductive structures known as cones. The main roots of cycads are thickened and fleshy and as they may have storage capacities they are often termed tuberous. Along with the fleshy stem they may have contractile properties which serve to regulate the level of the stem in ..., Cycad cones vary in size, with female cones ranging from <5 cm long to 1 m long, and weighing up to 40 kg. In certain species the cones are brightly coloured, possibly to attract animal pollinators and seed dispersers (Norstog and Nicholls, 1997 )., Cycad cones and flushes Cycad cones and flushes. By Urban Rainforest May 10, 2009 in TROPICAL LOOKING PLANTS - Other Than Palms. Share ... After looking at all of these photos I have decided to poison all my cycads. I have had them for years and the majority of them are still in the seedling stage. Only 3 were big enough to plant this year and ..., Flowers (Cones): Like all cycads, there are male and female plants (dioecious), and they reproduce similar to conifers by coning. The male cones are grey-brown broadly cylindrical 45-75 cm long and 12-20 cm in diameter with a open spiral pattern; The female cones are barrel shaped red 40-90 cm long and 12-25 cm in diameter, …, Caring For Cycas Revoluta Outdoors In The Landscape. Of course, if you like, set your potted Cycas outdoors in a sheltered area during temperate times of the year. In USDA hardiness zones 8b-11, the Sago palms can live outdoors year-round. In an outdoor setting, planted in the ground after many years plants can grow to a height of 10′ feet tall!, This is a Cycas Litoralis/Edentata that I planted in the back yard in the summer of 2021. It got 100% defoliated in January 2022 at about 26F with frost. I repotted it on 7/15/22 because Cycas normally flush here by mid-May. It was still firm with good roots, so I figured it had a chance., The flowers are actually more of a cone since sagos aren’t really palms but are cycads, the original cone forming plants. Some gardeners find them unattractive. So can you remove a sago plant flower without damaging the plant? Read on for the answer. As stated previously, sago palms are either male or female. Females form a flat, slightly ..., Africa Cycads is a supplier of cycads in South Africa. Find information on cycad species and how to acquire these rare plants. Visit our store to buy your own. Home; ... Cone diameter: 30cm ; Cone height: 65cm; Price: R12,500.00; Inventory number: 170-1928; Alexandria Cycad View Details. E. arenarius; Potted; Cone diameter: 35cm ;, 19 Jun 1993 ... The botany textbooks say that cycad cones are pollinated with ... insects. Tang studied the cycad Zamia pumila. A male cycad cone is a succulent,, Cycads are evergreen; the young leaves are light green and, grown in the shade, will develop to a length of 2-3 m. ... All cycads are long-lived and, to reproduce, male and female plants need to produce cones at the same time, so that pollen can be transferred to the female cone. The species varies somewhat and is closely related to E ..., This cycad cones frequently and responds well to artificial pollination. For best results, sow seed in river sand and place on a heated bench at 24-28°C. Germination should start 3 weeks after sowing. However, some seeds will take longer especially where there is no heat. At the one-leaf stage of development, the seedlings are susceptible to ..., Cycads are the most primitive of surviving gymnosperms, or cone-bearing plants with palm-like leaves and a thick soft stem of storage tissue, mostly lacking any true wood. Their fossil record dates back to the early Mesozoic - about three hundred million years BP. Their resemblance to palms or tree ferns ends when the plants produce cones., Cycads (Cycas revoluta) used in the experiments were grown at the University of Miyazaki and along prefectural road no. 367 in Tsunehisa, Miyazaki-city, Japan. Surface and Internal Temperature Measurements. The surface temperature of cycad cones was analyzed using images from a thermal imager, FLIR SC620 (FLIR Systems)., Thermogenesis occurs in the strobili of 42 of 43 species in the 10 genera of cycads, indicating a wide-spread phenomenon in this group. Heat production generally follows a circadian rhythm, and its strength and duration are positively correlated with strobili size. Male strobili contain high concentrations of starch that may supply the energy for thermogenesis. Strobili of all examined species ..., Encephalartos lehmannii is a low-growing palm-like cycad that is commonly known as the Karoo cycad. It is endemic to South Africa. This cycad has been descri... Home; Species of SA; On Sale; ... Male and female plants produce a single cone per stem. Male cones are sub-cylindrical, 250-350 mm long, 80-100 mm in diameter, carried on a short stem ..., In many areas cycads are also referred to as palms or ferns, particularly in local vernacular languages, and in Mexico they are also referred to as a type of corn, probably in reference to the female cones in Zamiaceae. A thorough compilation of local and vernacular names for cycads around the world has been prepared by Bonta and Osborne (2003)., Cycad palms are known as sago palms (Cycas cirinalis), Japanese cycad (Cycas revoluta), cardboard palms ... Nevertheless, the presence of both allyl- and propenylphenol derivatives in the volatiles from male and female cones of one cycad, Cycas revoluta, 56 appears to be on a firmer footing relative to the algae and horsetail reports above., produce cones full of pollen. Many of the cones on cycads are highly ornamental, like the bright red cones of Encephalartos ferox (see below). One of the reasons that cycads have survived for so long is that they can grow in harsh conditions. Many cycads naturally grow in pure sand or even on bare rock. Some can withstand hard freezes, Cycas - Download as a PDF or view online for free. 9.Female cone Megasporphylls are not organized in to cone It consist of loosely arranged megasporophylls that surrounds the shoot apex like foliage leaves Each megasporophyll is pinnate like Differentiated into upper, broad, lobed leaf like portion that has pointed end, And lower stalk like stipe The ovules are naked and 6-8 ovules are ..., Here is the cone. 1. Urban Rainforest Palms,Cycads and Exotics. Were in San Diego Ca. about 5 miles from the beach on Tecolote canyon. It seems to be an ideal growing climate with moderate temps. and very little frost. Vacation Rental in Leilani Estates, big island Hi PM me if interested in staying there., Cycad, any of the palmlike woody gymnospermous plants that constitute the order Cycadales. The order consists of three extant families, which contain about 10 genera and about 310 species. Some cycads are used as ornamental conservatory plants and are cultivated outdoors in warm climates., Cyanogenic Glycosides in Nuts and Seeds. Daniel J. Ballhorn, in Nuts and Seeds in Health and Disease Prevention, 2011 Cycad seeds. Cycas plants belong to the order Cycadales (family Cycadaceae), which consists of 11 genera of tropical and subtropical plants that produce terminal oblong cones containing orange-yellow seeds. Within the Cycadales, C. revoluta is the most …, Africa hosts a rich assemblage of cycads: 66 Encephalartos species, Stangeria eriopus and Cycas thouarsii. Most Encephalartos and S. eriopus adults appear to be fire-tolerant, and certain Encephalartos species may be fire-dependent. Four Encephalartos species and S. eriopus are primarily insect-pollinated. African cycad populations typically have sex ratios of 1:1, with very small populations ..., In Cycas true and compact female cone (ovulate strobilus) is absent, instead it is a lax where megasporophylls are loosely arranged at the stem apex that appears like a rosette. Each megasporophyll is a modified foliage leaf ranging from 15-30 cm. in length.