ROBINSON: PTERIDOPHYTA OF THE HawatlAN IsLANDs 241 
Mertensia dichotoma Willd. Sv. Vet.-Akad. Handl. II. 25: 167. 
1804. 
Dicranopteris dichotoma Bernh. Neues Jour. Schrad. 17: 38. 1806. 
Gleichenia linearis Clarke, Trans. Linn. Soc. II. 1: 428. 1880. 
TYPE LOCALITY: Java. 
DISTRIBUTION: Forming thickets at from 200-1,000 m. eleva- 
tion, tropical countries. 
ILLUsTRATIONS: Burm. Fl. Ind. pl. 07: f. 2. (1768s i numb. 
Fl. Jap. pl. 37. 1784. 
SPECIMENS EXAMINED: Hawaii, Hillebrand B; Robinson 240 V; 
Maui, Bailey B, C; Robinson 316 V; Oahu, Didrichsen 3772 C; 
Forbes BM; Robinson 24 V; Kauai, Forbes 80 BM; Heller 2761 C; 
Hawaiian Islands, Baldwin 1 C; Wilkes Expedition C; ex Herb. 
Eaton C; ex Herb. Mt. Holyoke College C. 
Dicranopteris owhyhensis (Hook.) comb. nov. 
Gleichenia owhyhensis Hook. Sp. Fil. 1: 9. 1844. 
Mertensia hawaiiensis Brack. Fil. U.S. Expl. Exp. 295. 1854. 
Gleichenia hawatiensis Hilleb. F l. Haw. Is. 544. 1888. 
TYPE LocaLity: Byron Bay, Oahu, Hawaiian Islands. 
DistRIBUTION: At elevations of 1,500-2,000 m., rare; Hawai- 
lan Islands, 
SPECIMENS EXAMINED: Maui, Bailey C; Hillebrand B; Oahu, 
Baldwin 9B; Hillebrand B; Heller C; Kauai, Hillebrand B; Robin- 
7m 407 V; 410 V; Hawaiian Islands, Baldwin 2 C; Macrae B, C. 
The name is derived from an early spelling of Oahu; the type 
Was collected upon this island by Macrae. 
3. CYATHEACEAE 
Mainly arboreous plants of the humid elevated regions of the 
Topics; reotstock stout and erect or decumbent; leaves cespitose, 
oy twice or more pinnate, rarely simple, articulate or non- 
nt aoe leaf blades mostly one to several meters long; sori 
dusiate- orsal or terminal upon the veins, indusiate or non-in- 
’ SPorangia usually numerous, ovoid, the annulus complete 
. i i . . 
ne Tan ad with or without a definite orifice; dehiscence hori- 
The family Cyatheaceae is represented in the Hawaiian flora 
