SALVINIACEAE [FIRST DRAFT]

槐叶苹科 huai ye ping ke

Lin You-xin (林尤興)

Small floating ferns; stems slender and horizontal, covered with hairs and protestele. Sessile or very short stipetate; 3 leavers verticillate, two of them floating on water surface, normal ones, elongate, green, entire, hairy, and densly covered with papillae on upper surface, costae slightly distinct; anather one submersed and finnaly dessected, called rhizoid. Sori clustred at stipe bases of submersed leaves, or duble attached along submerse ones;  micrsporocarp big in size and contained majority of microsporangia, each microsporangium  contained 64 microspores;  megasporngiia flowervase-shape, each one only contained one magaspore, trilete, experispore, with small retuse on exine; microspores spaeropteroid, trilete mark finner, exine of mark usually retuse, triangular, experispore, exine thiner, smooth.

            Single genus. Distributed all continents, most in american and african tropics.

1. SALVINIA Adans., Fam. Pl. 2: 15. 1763.

槐叶苹科属 huai ye ping shu

Characters of the genus same with family. Basel number of chromome X = 9.

            About 10 spicies. Widely didstributed all continents, most in tropics of American and African. One spicies in China.

1. Salvinia natans (L.) All., Fl. Pedem. 2: 289. 1785.

槐叶苹 huai ye ping

Masilea ntans L., Sp. 2: 1099. 1753.

            Small floating ferns. Stems covered with dark-brown and articulate hairs. Three leaves verticillate, two of them normal, floating on surface of water, like shape of ‘Robinia’leaves, 0.8-1.4 X 0.5-0.8 cm, obtuse at apexes, bases rounded or subcordate, entire; stipes 1 mm long or sessile. Veination obliquely spreading, veinlets 15-20 pairs on either side of costa, each one with 5-8 bunches of white setae. Leaves herbaceous, deep-green on upper surfaces, densely covered with brown villoses on under surfaces; submersed leavers, finanly dissected into linear, covered with hairs, root-like, action as roots. 4-8 sporocarps clustered at bases of submersed leaves, sparsely covered with bunds of hairs on surfaces,; microsporocarps yellownish on surfaces, megasproacorps brownish on surfaces.

            In rice fields, ponds or ditches; widely destibuted in valley and region of Changjiang and N. China, N-E. China, Xinjiang and Taiwan [India, Vietnan and Europe].

             Whole plants are used as medicine, boid and eating for consumptive disease and eczema; external use for inframmatory disease with redness of skin, furuncle and scald.