1 28 PATAGONIAN EXPEDITIONS I BOTANY. 



Species chiefly tropical ; also many in New Zealand, and some in tem- 

 perate climates. 



TRICHOMANES Linn. 



Indusium tubular or cuplike, sometimes 2-lipped. 

 Species 100, mostly tropical. 



T. OESPITOSUM (Gaud.) Hook. (Serpyllopsis antarctica Besch.) 

 Frond once-pinnate, 5 cm. high ; pinnae small, entire, their surface hori- 

 zontal, their rachis not winged. Reddish hairs on stipe and veins. 



Patagonia to Cape Horn; Falklands. "Common on trunks of trees." 



T. FLABELLATUM Bory. 



Frond fan-shaped, orbicular, palmately divided halfway; the ultimate 

 lobes short, linear, entire, 5 cm. high. 

 Falklands. 



HYMENOPHYLLUM Linn. 



Indusium 2-valved, receptacle not protruding. 

 Species at least 100, chiefly tropical. 



H. ABRUPTUM Hook. f. 



Glabrous, 25 mm. high. Frond oval-triangular, once-pinnatifid ; pinnae 

 at most simply forked. Main rachis broad-winged below. 

 (W. Indies; Brazil); Patagon.; Clarence I. (var. brevifrons]. 



H. /ERUGINOSUM Carm. 



10 cm. Stipe tomentose. Frond thrice pinnatifid, pubescent. Main 

 rachis winged above. Ultimate segments linear with terminal sori. 

 (Tristan) ; W. Magellan. 



H. BRIDGESII Hook. 



1 2 cm. Frond ovate-triangular, thrice-pinnate. Rachis slightly winged 

 above. Ultimate segments narrow-linear, rigid, not crisped, spinulose- 

 toothed. Sori at base of pinnules. 



(Melville I.) ; Fuegia (by Dusen). 



H. OESPITOSUM Christ. 



Low, densely cespitose, 2-3 cm. Its 12-15 pinnae spirally arranged, 

 simple or bipartite. Sori ? 



W. Patagon. ; S. Fuegia (by Dusen). 



