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Megasporophyll |
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megasporophyll [‚meg·ə′spȯr·ə‚fil]
(botany) A leaf bearing megasporangia. Megasporophyll a leaf on which or in the axil of which only megasporangia (or a megasporangium) form. Megasporophylls are characteristic of heterosporous Lycopodiales (Lepidodendron, Selaginella) and sago palms. In angiosperms the carpel is homologous to the megasporophyll. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | 7) the axis carried two to 30 scales, including four to six " megasporophylls " with terminal inverted ovules. Megasporophylls not organized into a determinate strobilus but, rather, spirally arranged in a loose terminal cluster and falling separately at maturity, with the central axis eventually continuing vegetative growth; each megasporophyll with a proximal stalked portion bearing 2-10 marginally inserted ovules and a distal pinnatifid, pectinate, or toothed laminar portion. The divergent position of Cycas was reinforced, lending support to its ancient age and possibly primitive megasporophyll morphology. |
Megasporophyll |
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