xi, c, 4 Copeland: Hawaiian Ferns 173 



ELAPHOGLOS8UM ROCKII 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, oblanceolata, breviter 

 acuminata, deorsum usque ad basin abrupte truncatam sensim 

 angustata, minute et sparse squamulosa, papyracea (sicca) ; 

 fronde fertile paullo angustiore, aliter conforme. 



Koolau Mountain, Punaluu, Rock 259, 21U- 



This differs from Elaphoglossum crassicaule Copel. T 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 Brackenridge's plate of Polypodimn 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 707U 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 Polypodivm Rockii shows no 

 "surculi." 



7 Philip. Journ. Sci. 9 (1914) Bot. 440. 



