9. TRICHOMANES. 87 



§ 2. EUTRICHOMANES. c. Qonocormus. 



±. Fronds not proliferous. 

 IS. Edges not ciliate. 



3. Margin not bounded by a thickened line, nor purveyed with a sub- 

 marginal spurious vein. 

 4:. Spurious veins wanting throughout. 



a. Fronds small, to about 10 mm. lon^. 



(7) T. saxifragoides. 

 S.S. Fronds somewhat larger, at least 10 mm. long. 



e. Stipes short, i — 4 m.M. long. Fronds cuneate' 

 flabellate, sometimes simple and oblong. 



(8) T. Aswijkii. 



6.e. Stipes longer, iO — 30 m.M. long. \ Fronds commonly 



\roimdish in outline. (9) T. nitidulum. 



41.*. Spurious veins present. (10) T. parvulum. 



3.3. Margin bounded by a thickened line or purveyed with a submarginal 



spurious vein. 



>(c. Marginal line {spurious vein) continuous. (11) T. nanum. 



itotc. Submarginal spuriom vein interrupted. (12) T. rupicolum. 

 3.2. Edges ciliate. 



$. Ciliae ' tooth li/eOf distant. Veins naked. (13) T. digitatum. 



$.$. Ciliae capillary, approximate. Veins hairy. (14) T. palmatifidum. 

 ±.±. Fronds proliferous, i. e. the stipe, rachis or casta bearing 1 or more sessile 

 or- stalked secmidary frondiculae, which gives the whole frond the appearance 

 of a very irregularly and pinnately divided single frond, besides which there 

 often are also not-proliferous ones. 

 >|c. Frondiculae few. 



S. Fronds and frondiculae ternate or quinale. (15) T. diffusum. 



$.$. Fronds and frondiculae with more numerous segments. 



(16) T. minutum. 

 ;tc.>|<. Frondiculae many. 



•J>. Rhizome hairy. Ultimate segments complicate. (17) T. proliferum. 

 •{•.•{•. Rhizome nearly naked. Ultimate segments not complicate. 



(18) T. Teysmanni. 



