XI, C, 4 
Copeland: Hawaiian Ferns 
173 
ELAPHOGLOSSUM ROCK1I sp. nov. 
Species gregis E. gorgonei, rhizomate fere 1 cm crasso, cum 
stipitibus brevissimis et basibus costarum paleis castaneo-ferru- 
gineis anguste linearibus valde crinitis 10-30 mm longis densis- 
sime obtectis ; fronde 25-40 cm alta, obianceolata, breviter 
acuminata, deorsum usque ad basin abrupte truncatam sensim 
angustata, minute et sparse squamulosa, papvracea (sicca) ; 
fronde fertile paullo angustiore, aliter conforme. 
Koolau Mountain, Punaluu, Rock 259, 21b. 
This differs from Elaphoglossum crassicaule Copel. 5 in its dense mass of 
brownish paleae, less stout stipe, and less horizontal venation. 
Rock’s Nos. 212, 215, and 244 differ in having dark chestnut paleae 
and fronds gradually narrowed below. They may represent still another 
species; but as more complete collection in the locality where all these 
were found may close the gap between them, they may stand for the 
present as varying forms of one kind. 
Of Elaphoglossum Fauriei, Rock has collected several specimens, all 
from Molokai. 
ELAPHOGLOSSUM HIRTUM (Sw.) C. Chr. 
This species is more variable than any description indicates. At one 
extreme are the most densely scaly plants, with ferruginous rhizomatal 
paleae, with their tips darker but by no means black. Other very scaly 
plants have these tips practically black, as described by Hillebrand. At 
the other extreme are some sparsely scaly plants from Koolau Mountain, 
Punaluu, with slender stipes and the paleae of the rhizome black through- 
out. Complete collections would very likely reveal an entire series of 
intermediate forms. The paleae of the upper surface of the frond are 
usually paler than those of the nether surface, and this difference some- 
times goes so far that the former are clear-white and shining. 
POLYPODIUM ROCKII sp. nov. 
P. adenophorum, P. sarmentoso affine, stipitibus gracillimus 
2-4 cm altis, segmentis remotis decurrentibus linearibus integris, 
venis costis subparallelis, soris paucis. 
Koolau Mountain, Punaluu, Rock 272. 
Mr. Maxon, of the United States National Museum, has been kind enough 
to send me photographs of Braekenridge’s plate of Polypodium sarmen- 
tosum and of the type sheet in the National Herbarium, the latter bearing 
two plants both of which are accurately reproduced on the plate. Of these 
two, the larger, regarded by Mr. Maxon as the type plant, collected on 
the mountains back of Honolulu, is surely a freak plant; different as 
the two appear, they may well represent one species. This is represented 
by 707b of the College of Hawaii herbarium, from the Wailau trail, Molokai. 
The veins leave the costae at an angle much wider than do those of Poly- 
podium Rockii. The paleae of the latter are darker, but this difference 
may not be constant. The specimen of Polypodium Rockii shows no 
“surculi.” 
7 Philip. Journ. Sci. 9 (1914) Bot. 440. 
