Vandenboschia HYMENOPHYLLACEAE-PLAGIOGYRIACEAE Plagiogyria 



Lamina 10-25 cm. long; fr. VII- VIII; pinnae unequal at base, margins cleft. 

 Asia and East Indies; locally in Ki. On damp rocks along mountain streams. 

 2. Vandenboschia radicans (Sw.) Copel. {Trichomanes radicans Sw.) (Ph. J. 67:54). 

 Stalk 5-15 cm. long, lamina up to 30 cm. long; fr. VII-VIII; exceedingly variable. 

 Cosmopolitan; locally in Ki. On damp rocks in mountain streams. 



12. CERATOPTERIDACEAE Maxon 7kMP{ (Shui Chiieh K'o) 



Aquatic ferns of three types, some species floating on the water, some rooting in 

 the mud and growing completely submersed except perhaps for the tips of fertile lvs., 

 and others rooting in the mud and growing emersed as bog plants: apparently stemless, 

 the fibrous roots arising from the base of the stipes: lvs. dimorphic; fertile lvs. erect, 

 contracted, taller; sterile lvs. pinnate, pinnately compound, or simple: sporangia 

 sessile, globose; annulus variable; indusia formed by the reflexed leaf margins; surface 

 of spores marked by a series of ridges. One genus. 



1. Ceratopteris Brongn. Water Fern jKMM (Shui Chiieh Shu; 



Water Fern Genus) 



The characters are those of the family. Probably 8 species, 2 in China. (Greek: 

 cerato, horn, and pteris, fern; the fertile lvs. resemble deer antlers. ) 

 1. Ceratopteris thalictroides (L.) Brongn. (Bd. F. 123). Sterile and fertile leaves 

 both growing at same time; fr. IX-X; fertile leaves 20-60 cm. Temperate and 

 sub-tropical regions; locally in An., Che. Submersed in shallow water. 



A related form, which may prove to be a distinct species, occurs in China and Indo- 

 China (locally in Kiangsu), floating on shallow water in marshes. It is distinguished from 

 C. thalictroides by its floating rather than submersed habit, and also by its short stipes and 

 simple leaves. 



13. PLAGIOGYRIACEAE Bower M&.M& (Liu Tsu Chiieh K'o) 



Terrestrial ferns: stipes clustered; base enlarged, bearing spongy glands: leaves 

 dimorphous, both kinds pinnate; veins free, simple or forked: sori of ten covering the 

 contracted fertile leaves: sporangium with an oblique continuous annulus: unaltered 

 reflexed margin serving at first as a false indusium: rhizome and stipe ivithout scales. 

 One genus. 



1. Plagiogyria (Kunze) Mett. fgfMD:!! (Liu Tsu Chiieh Shu; 

 Tumor-footed Fern Genus) 



The characters are those of the family. 31 species. 



Key to the Species 



Apex pinnatifid, with about 30 pairs of lateral pinnae 1. P. hayatana 



Apex with terminal pinna and 10-15 pairs of lateral pinnae. 



Terminal pinna confluent; lateral pinnae mostly adnate 2. P. japonica 



Terminal pinna free; lateral ones mostly free 3. P. euphlebia 



1. Plagiogyria hayatana Makino (Ph. J. 38:401). Sterile leaves 40-85 cm. tall; fr. 

 VII-VIII; lateral pinnae adnate; lower ones deflexed, shorter. China, Formosa; 

 locally in An. Wooded hillsides. 



2. Plagiogyria japonica Nakai (DeV. F. 56). Sterile leaves 45-55 cm. tall; fr. VII-X; 

 sterile pinnae 5-8 cm. long. China, Japan, Korea; locally in An., Ki. By mountain 

 streams. Fig. 7. 



31 



