246 ROBINSON: PTERIDOPHYTA OF THE HAWAIIAN ISLANDS 
matted covering, which resembles a liverwort in general appear- 
ance. . 
TRICHOMANES HUMILE Forst. Prod. 84. 1786 
Trichomanes minutulum Gaud. Freyc. Voy. Bot. 377. pl. 12. f. 2. 
1827. 
Didymoglossum humile Presl, Hym. 23. 1843. 
Trichomanes Endlicherianum Presl, Abh. Béhm. Ges. 5: 333. 1848: 
Trichomanes Draytonianum Brack. Fil. U.S. Expl. Exp. 252. 1854. 
TYPE LOCALITY: Society Islands. 
DistRIBUTION: On tree trunks in moist woods; Polynesia, 
Java, Formosa, New Zealand, Australia. 
ILLustRATIONS: Presl, Epim. 10. pl. 54. 1849; v. d. Bosch, 
Hym. Java pl. rz. 1861; Brack. Fil. U. S. Expl. Exp. #1. 36. 
1854. 
SPECIMENS EXAMINED: Maui, Bailey C; Oahu, Robinson 55 V; 
99 V; Kauai, Heller 2556 C; Hawaiian Islands, Baldwin 108 C; 
Remy 83 B; Wilkes Expedition 9 B, C. 
TRICHOMANES CYRTOTHECA Hilleb. Fl. Haw. Is. 636. 1888 
TYPE LOCALITY: Kahana, Oahu. : 
DiIsTRIBUTION: Above 600 m. elevation; Hawaiian Islands, 10 
wet woods. 
ILLUSTRATION: PLATE Ig. 
SPECIMENS EXAMINED: Maui, Bailey C; Oahu, Hillebrand B; 
Robinson 107 V; Hawaiian Islands, Baldwin B; Baldwin 106 C- 
The color and size of the leaves are similar in T. cyrtotheca and 
T. radicans and both grow in deep wet forests, but they may be 
distinguished by the deltoid form of the leaf blade, the curving 
of the sori, and the smaller size of the rootstock of the former and 
the irregular outline, blunt pinnae with sori subimmersed, 
thicker rhizome of the latter. 
I 
TRICHOMANES RADICANS Sw. Jour. Bot. Schrad. 1800°: 97: 180 
Trichomanes speciosum Willd. Sp. Pl. 5: 514. 1810. 
Trichomanes davallioides Gaud. Bot. Freyc. Voy. 3- 1827: 
Trichomanes sandvicense v. d. Bosch, Ned. Kr. Arch. 5°: 165- 1861- 
TYPE LOCALITY: West Indies. 
DistRiBuTION: Tropical countries, Ireland, Wales. 
