Zamiaceae
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Scan day: 06 March 2014 UTC
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Description: Description of the family.
Palm like plants with subterranean to tall and erect usually unbranched cylindrical stems, stems clad with persistent leaf bases (in Australian genera). Leaves simply pinnate, spirally arranged, interspersed with cataphylls; leaflets sometimes dichotomously divided. Longitudinal ptyxis erect to inflexed or sometimes reflexed, horizontal ptyxis conduplicate. Leaflets with several sub parallel dichotomously branching longitudinal veins, lacking a mid rib; stomata on both surfaces or undersurface only; individual ptyxis flat. Trichomes coloured or transparent, branched or unbranched, short curved or idioblastic. Male and female sporophylls spirally aggregated into determinate axillary cones. Female sporophylls simple, appearing peltate, with a barren stipe and an expanded and thickened lamina with 2 (rarely 3 or more) sessile, orthotropous ovules inserted on the inner (axis facing) surface and directed inwards ("inverted"). Seeds radiospermic.
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| Page title: | The Cycad Pages |
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| IP-address: | 141.243.34.62 |