180 Evans: TAXONOMIC STUDY OF DUMORTIERA 
E. D. Merrill 7901; 1910, E. Fénix 12814; 1907, A. D. A. Elmer 
8614; Bontoc Subprovince, Luzon, 1910, Father Vanoverbergh 
875; near the Shibuyan River, Davao District, Mindanao, 1904, 
E. B. Copeland 985. 
SuMATRA: foot of Mt. Singalang, 1894, V. Schiffner (distri- 
buted as D. velutina in Iter Ind. 32). 
Java: Buitenzorg, F. A. W. Miquel; same locality, 1894, V. 
Schiffner (distributed as D. velutina in Iter Ind. 27); same local- 
ity, 1906, D. H. Campbell; Tjibodas, Preanger Province, 1894, V. 
Schiffner (distributed as D. hirsuta var. latior in Iter Ind. 24). 
Borneo: Bidi Caves, Bau, Sarawak, 1913, D. H. Campbell 
(type of D. calcicola). 
HawallAN IsLAnDs: without definite localities, D. Dousiss 71 
(type of Marchantia trichocephala); 1864-70, H. N. Bolander; 
1876, J. Bailey 1; Honolulu, Oahu, 1892, D. H. Campbell; Panoa, 
Oahu, 1895, A. A. Heller 2330; Manoa Valley, Oahu, 1917, D. H. 
Campbell; Oahu, 1918, H. L. Lyon; West Maui, 1875, D. D. 
Baldwin. 
SAMOAN IsLANDs: Utumapa, Upolu, C. & L. Rechinger (dis- 
tributed as D. velutina in Krypt Exsic. Mus. Palat. Vindob. 
1391); without definite locality, 1888, Frances C. Prince. 
The type specimen of Hygropyla nepalensis in the Taylor 
Herbarium shows a thallus with numerous surface papillae asso- 
ciated, as Taylor’s figures indicate, with a bristly female recep- 
tacle. The type specimen of Marchantia trichocephala in the 
same herbarium shows a thallus with still more numerous papillae 
and female receptacles which are still more bristly. Both speci- 
mens clearly belong to the same specific type. The var. latior of 
D. hirsuta, which is listed above in the synonymy, was probably 
an admixture; it was based on specimens from various parts of 
the world and may have included forms which would now be 
referred to the true D. hirsuta. The var. trichopus, however, is 
_undoubtedly a true synonym of D. nepalensis, as the specimens 
distributed by Spruce clearly indicate. 
The last two species which are listed among the synonyms have 
already been discussed to some extent in the preceding pages. 
D. velutina is distinguished from strongly papillose forms of 
D. nepalensis by certain features of the female receptacie, but 
