台灣植物誌 第二版 Flora of Taiwan, 2nd edition Vol. 1
34. PARKERIACEAE 水蕨科
DEVOL, CHARLES E. and SHIEH, WANG-CHUENG
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.
A family of aquatic ferns with only one genus.
1. CERATOPTERIS Brongn. 水蕨屬 Characters of the family.Four species, only one growing wild in Taiwan. 1. Ceratopteris thalictroides (L.) Brongn. In Bull. Sci. Philom. 1821: 186. 1822; DeVol in Taiwan 1: 129. pl. 43. 1975. 水蕨 Pl.208
Fronds dimorphic, the sterile narrowly oblong in outline, bipinnatifid to tripinnatifid; stipe slender, about as long as blade; pinnae usually alternate, rarely opposite, the ultimate segments usually 2-3 mm wide, rarely wider; fronds vary widely in size, usually 10-35 cm long; fertile fronds much longer than sterile. Sporangia globose, the annulus well developed; lip cells usually not well developed. Spore number 32.
Widely distributed in the tropics of southeast Asia, the Pacific Islands, Madagascar, the West Indies, southern U.S.A., Central and South America. Growing in paddy fields, marshes, and along slow flowing streams.
TAIPEI: Taipei, Huang 1261; Peitou, Simozawa 733. ILAN: Toucheng, DeVol 8125*. TAOYUAN: Suzuki 3380. NANTOU: Puli, Hsu 7548; Sun Moon Lake, Kudo 15524. TAINAN: Matao, Morimoto 279. PINGTUNG: Hsiaoliuchiu, Hosokawa 1606; Nanjenshan, Kuo 4149. TAITUNG: Kawakami 4791; Is. Lanyu, Huang 7518.