222 RoBINSON: PTERIDOPHYTA OF THE HAWAIIAN ISLANDS 
SPECIMENS EXAMINED: Hawaii, Robinson 616 V; 625 V;. Maui, 
Bailey C; Finsch B; Hillebrand B; Robinson 715 V; Oahu, Chamisso 
B; Diell C; Forbes BM; Hillebrand 27 B; Macrae B; Meyen B; 
Kauai, Heller 2623 C; Hillebrand 118a B; Hawaiian Is., Baldwin 
53 B, C; Gaudichaud (type) B; Miss Sessions C; Wilkes Expedition 
G. 
ATHYRIUM BALpwInit (Hilleb.) C. Chr. Ind. Fil. 140. 1905 
Asplenium Baldwinit Hilleb. Fl. Haw. Is. 618. 1888. 
TYPE LOCALITY: Kauai. 
DISTRIBUTION: High altitudes, Kauai. 
SPECIMENS EXAMINED: Kauai, Bailey C; Baldwin 54 (type) 
B, C, K; Forbes 125 BM; 240 BM; Robinson 4o2 V; 426 V; 458 V; 
461 V; 464 V. 
The sori are subapical in this species and a fibrillose scale 
appears at the base of almost every pinna, while the sori of A. 
Poiretianum are typically medial or proximal upon the veins. 
28. DIPLAZIUM Sw. Jour. Bot. Schrad. 18007: 61. 1801 
Rootstock short, creeping or suberect; leafblades simple to — 
quadripinnatifid; basal scales of leafstalk clathrate, with or with- — 
out glands; vascular bundles two at the base of leafstalk uniting 
above; veins free, once to several times forked; sori linear, 11- 
dusiate, often double, the indusium opening as in Asplenium. 
Type species: Diplazium plantaginifolium (L.) Sw. 
The Hawaiian species of Diplazium form a very natural grouP, 
more firm in texture and coarser in habit than the species of 
Athyrium, hence it seems better on account of the limitations of 
this paper to follow Diels (Eng. & Prantl, Nat. Pflanzenfam. 1°: 
224. 1902) than to place these plants in the genus Athyrium, 
following Milde (Bot. Zeit. 24: 373. 1866) and Copeland (Philipp- 
Jour. Sci. 3: (Bot.) 285. 1908) 
Leaves pinnate; rootstock erect or creeping; leafstalks more or 
less paleaceous at base, with non-glandular scales 
Rootstock erect; leafstalks stout, dull green, dark pecan’ in 
drying; basal scales few, light brown; leafblade ovate- 
lanceolate, 15-30 cm. long, membranous; middle pinnae 
linear-lanceolate, 12.5-15 cm. 7-22 mm.; basal pinnae ae 
reduced, the lowest auricled. D. marginale. | 
Rootstock creeping; leafstalks slender, stramineous; basal. 2 
scales dark brown. 
