ROBINSON: PTERIDOPHYTA OF THE HAWAIIAN IsLaANps 211 
SPECIMENS EXAMINED: Maui, Bailey C; Hillebrand B; Finsch 
27 B; Oahu, Mt. Kaa, Macrae B; Hawaiian Is., Baldwin Bo 
Wilkes Expedition B, C; Lindley C. 
The difference between A. densum Brack. and the European 
A. Trichomanes L. consists in the fewer sori (never more than one 
row in the Hawaiian plant) and the more prominent wings upon 
the rachis, which suggests the question whether slight differences 
between plants widely elope geographically should be regarded 
as specific. 
ASPLENIUM PAVONICUM Brack. Fil. U. S. Expl. Exp. 150. 1854 
Asplenium normale Hilleb. Fl. Haw. Is. 588. 1888. Not Don. 
TYPE LOCALITY: Saw Mill, Hawaii. 
DISTRIBUTION: In moist, shady forests, Hawaiian Islands; 
rare. 
ILLUSTRATION: Brack. U. S. Expl. Exp. pl. 20. f. 1, ra, 1b. 
SPECIMENS EXAMINED: Hawaii, Wilkes 50465 N (type); Kil- 
auea, Lichtenthaler N; Maui, Bailey C; Lichtenthaler N; Kauai, 
Forbes 160 BM; Heller 2771 C, N; Knudsen 10 B; Robinson 823 V; 
Oahu, Heller 2218 C; Safford 976 N; 977 N; Hawaiian Is., Baldwin 
33 C; Lydgate B; Macrae B; Van Ingen C; ex Herb. John Donnell 
Smith N; Wilkes Expedition B. 
A. pavonicum is very nearly related to A. normale Don from 
Ceylon, but differs in the form of the pinnae and in size. . 
ASPLENIUM PSEUDO-FALCATUM Hilleb. Fl. Haw. Is. 597. 1888 
_ Type Loca.ity: Hawaiian Islands. 
DistriBuTION: Hawaiian Islands. 
SPECIMENS EXAMINED: Hawaii, Hillebrand B; Robinson, 628 V; 
620 V; 279 V; Wilkes Expedition N; Maui, Lichtenthaler Gs 
Robinson 716 V; 710 V; ex Herb. John Donnell Smith N; Oahu, 
Hillebrand B; Remy B; Robinson 144 V; 173 V; seoheenage Is., 
ex Herb. Mt. Holyoke College C. 
From the forms of A. lobulatum the pinnae of which are little 
divided, A. pseudo-falcatum is distinguished by its chartaceous 
texture in contrast to the coriaceous texture of A. lobulatum. — 
