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IBSC | Family List | Pteridophyta | Helminthostachyaceae

Helminthostachys Kaulf.

七指蕨属

Description from Flora of China

Ophiala Desvaux.

Plants medium-sized, terrestrial, evergreen. Rhizomes shortly creeping, dorsiventral with fronds in 2 rows on dorsal side; buds glabrous; roots thick. Fronds solitary, sterile lamina perpendicular to common stipe, ternate with large basal pinnae divided into few pinnules, thus appearing palmately dissected as a whole; veins free, forked into parallel close veinlets. Sporophore attached at base of sterile lamina, spikelike, cylindrical; sporangia globose, born in pseudowhorls on radially arranged stalked clusters interspersed with small sterile projections. Spores trilete, globose, surface reticulate, with delicate projections ± fused baculate. n = 94.

One species: widely distributed in tropics and subtropics of the Old World.

(Authors: Zhang Xianchun (张宪春); Norio Sahashi)


 

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