596 RoBINSON: PTERIDOPHYTA OF THE HAWAIIAN ISLANDS 
DRYOPTERIS KERAUDRENIANA (Gaud.) C. Chr. Ind. Fil. 272. 
1905 
Polypodium Keraudrenianum Gaud. Voy. Freyc. Bot. 362. 1829. 
Phegopterts Keraudreniana Mann, Proc. Am. Acad. 7: 218. 1867. 
Nephrodium Keraudrenianum (Gaud.) Diels in E. & P. Nat. Pfl. 1*: 
177. 1899. 
TYPE LOCALITY: Hawaiian Islands. 
DIsTRIBUTION: In forests, Hawaiian Islands. 
ILLUSTRATION: Gaud. Voy. Freyc. Bot. pl. 7. 1829. 
SPECIMENS EXAMINED: Hawaii, Robinson 336 V; Wilkes Expedi- 
tion C; Maui, Hillebrand B; Molokai, Hillebrand B; Kauai, 
Forbes 96 BM; Hawaiian Islands, Baldwin 78 C; Baldwin V; 
Gaudichaud (type) B; Hillebrand B, C. 
Although Dryopteris Keraudreniana and Dryopteris rubiformis 
are very similar in habit, they may be easily distinguished by the 
stramineous midrib and broad lanceolate pinnae of the former in 
contrast with the reddish midrib and narrow linear pinnae of the 
latter. Both support their weight by the attachment of the tips 
of the leaves to other plants, in a vinelike coil. If the leaf curves 
so that the end finally reaches the soil, it does not take root. 
. Hillebrand’s variety tripinnata (Hilleb. Fl. Haw. Is. oe 
1888) has toothed segments in its pinnules, but this difference 1s 
too slight to warrant its separation from the species. 
Dryopteris rubiformis nom. nov. 
Polypodium procerum Brack. Fil. U.S. Expl. Exp. 14. 1854. Not 
Dryopteris procera (Baker) Kuntze. 
Phegopteris Keraudreniana var. procera Hilleb. Fl. Haw. Is. 562. 
1888 
TYPE LocaLity: Hawaiian Islands. 3 
DisTRIBUTION: In open places on the mountain sides, Hawat- 
ian Islands. 
ILLUSTRATION: Brack. Fil. U. S. Expl. Exp. pl. 3. 1854- 
SPECIMENS EXAMINED: Maui, Hillebrand B; Kauai, Robinson 
423 V; 829 V; Hawaiian Islands, Baldwin 04 C; Wilkes Expedition 
& 
The reddish stem and midrib of this fern, together with its 
tendency to curve and rest its weight upon other plants 1m 4 
