作者

DEVOL, CHARLES E. and SHIEH, WANG-CHUENG

型態特徵

Stems apparently absent, very short, erect; fibrous roots borne from near base of stipes; stipe scales thin, pale brown. Fronds glabrous, dimorphic, young leaves sterile, these either being deeply 3-lobed, pinnate or tripinnatifid (depending on the species);fertile leaves appearing later, taller, much dissected, pinnae contracted; venation anastomosing; areolae without included veinlets; tissues succulent. Sporangia borne in a single line along marginal veins, globose, short-skalked, the annulus usually well developed, the dehiscence transverse; false indusia much refleced, nearly meeting at midrib. Spores large, tetrahedral, ribbed.

屬

A family of aquatic ferns with only one genus.

參考文獻