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Dinghushan | Family List | Salviniaceae

Salvinia Adanson

槐叶苹属

Description from Flora of China

Plants floating, small. Stems horizontal, slender, covered with dark brown articulate hairs. Fronds in whorls of 3, sessile or very shortly stipitate; two fronds floating on water surface, green, entire, herbaceous, densely covered with papillae on upper surface, costae slightly distinct; veins obliquely spreading; third frond submersed and finely dissected, densely hairy, and rootlike. Sporocarps clustered at stipe bases of submersed fronds, or in 2 rows along midrib of submersed frond; microsporocarp large, thin-walled, and containing many microsporangia on a branched receptacle, each microsporangium containing 64 microspores; megasporangia vase-shaped, each one only containing 1 megaspore, trilete, perispore absent; microspores ?covered, trilete, mark usually retuse, triangular, perispore absent, exospore thinner, smooth. x = 9.

About ten species: worldwide, mostly in American and African tropics; two species in China.

Lower Taxon


 

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