cones megasporophylls

Listing 1 - 10 from 10 for cones megasporophylls

The Cycad Pages
... basal callus present absent Leaves simply pinnate bipinnate Leaves apically truncate not truncate Megasporophylls not in cones gathered in cones Sporophylls in vertical rows spirally arranged Sporophyll apex a single prominent spine two ...
plantnet.rbgsyd.nsw.gov.au

Cycas tansachana
... in the larger and distinctly keeled leaves with stiffer, broader leaflets, and the larger male cones, megasporophylls and seeds. The bark is also somewhat thicker and more corky, and the crown of ... apex 6-15 mm long, level, apical spine prominent, sharply upturned, 1-3 mm long. Megasporophylls 20-22 cm long, yellow-tomentose to brown-tomentose; ovules 2-4, glabrous; lamina orbicular ...
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Cycads
... Cycas male cones male cone with 2 microsporophylls removed Biodisc photomicrograph microsporophyll showing microsporangia on surface C.S. microsporophyll & microsporangia Female cones & megasporophylls Megasporophyll ... leaves. Cycads are all dioecious with microsporophylls always grouped into cones (megasporophylls also form cones except in Cycas) The gametophyte has been internalized (endospory) ...
scitec.uwichill.edu.bb

Practical - Gymnosperms
... are grouped into male cones. The megasporophylls, on the other hand, are another matter. In some cycads such as Cycas circinalis, the Sago 'palm', the megasporophylls are not grouped into cones but are borne as a fringe around the apical meristem. The microsporphylls in this species are clustered into cones but all the ...
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UGA Plant Biology | Greenhouses | Non-Flowering Plants
... leaves four feet long click for larger photo This Z. skinneri usually produces more female cones than leaves click for larger photo Welwitschia mirabilis display with Ephedra spp. in the ... with female cones click for larger photo Encephalartos horridus click for larger photo Pollen bearing male cones click for larger photo Cycas wadei female cone with two whorls of old megasporophylls still attached ...
www.botany.uga.edu

Cycad International : Katherine NT Australia
... other genera, the megasporophylls of Cycas do not form a determinate female cone, although they are somewhat tightly clustered together when first emerging. After pollination, the megasporophylls of certain ... (and probably D. mejiae, whose female cones have not been described) produce very large, pendant cones, among the largest in the Cycadales. Mature female cones of these species measure up ...
www.cycadinternational.com.au

Cycad Society SA: Encephalartos aplanatus
... bears one or two cones. They can be up to 400mm longand 120mm in diameter. Peduncles are stout and up to 60mm long. The exposed faces of megasporophylls are flat, smooth and also hairless, like the microsporophylls. The facets are indistinct with sharp abaxial ridges. The cones appear in January, mid summer, pollen ...
www.cycadsociety.org

Cycad Society SA: Encephalartos hirsutus
... peduncle up to 60mm long, hidden amongst cataphylls in the trunk crown. The median megasporophylls (female cone scales) are rhombic with four lateral and one central facet, about ... E. hirsutus in its subsessile, strongly succubous leaflets. Profound differences are observable in the cones of E. hirsutus. References & Acknowledgements Encephalartos Vol 46: Focus on Encephalartos hirsutus - J. Hurter ...
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Lab VIII - Medullosans and Cycads (3)
... e.g. Crossozamia. Among these are taxa that produce megasporophylls in a helical arrangement similar to the simple ovulate cones of extant Zamia. The megasporophylls have ovules (VG 1:13) attached to their ...
www.ucmp.berkeley.edu

lycopod picture links
... Tree-like lycopods were heterosporous; in some forms the megaspores with surrounding megasporangia and megasporophylls look almost seed-like. Unlike in any other type of tree which all have ... Lepidophyllum sp. M. Hieb's Plant Fossils of W. Virginia as above, one with cones Lepidophyllum sp. Mazon Creek Exhibit, Illinois State Mus. Lepidophylloides Virtual Paleobotany Laboratory Lepidophylloides ...
www.uni-muenster.de

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