ROBINSON: PTERIDOPHYTA OF THE HAWAIIAN IsLANDS 573 
DISTRIBUTION: On ground in wet woods at 600-700 m. eleva- 
tion, Hawaiian Islands, Society Islands. 
ILLUSTRATION: Fée, Mém. Foug. 2: pl. gr. 1845 
SPECIMENS EXAMINED: Hawaii, Mann & Brigham 286 N; 
Maui, Lichtenthaler N; Robinson 303 V; Oahu, Heller C, N; 
Robinson 4V; 48 V; Wilkes Expedition N; Kauai, Heller C; Robin- 
son 833 V; Hawaiian Islands, Baldwin too C; Miss Sessions C; 
ex Herb. Mt. Holyoke College C. 
2. PTERIS.-L. Sp.Ft. 1073. 1753 
A cosmopolitan genus of various habit. Rootstock usually 
creeping; leafstalk articulate; blades variously divided; sori mar- 
ginal, linear, continuous upon a slender receptacle, connecting the 
tips of the free veins, indusiate. 
Type species: Pteris arborea L. 
Leaf blade broadly oblong, bipinnate; sterile pinnae broader than 
fertile pinnae, segments of former irregularly crenulate, segments of 
latter entire; midrib not winged. P. excelsa. 
Leaf blade ovate to ovate-oblong, bipinnate to quadripinnate; midrib 
winged throughout or terminal pinnae decurrent. 
Midrib winged toward the apex, the terminal pinnae decurrent; 
leaf pinnate; pinnae linear-lanceolate, simple, or the lowest 
pair often bi-tripartite. 
Midrib winged throughout; leaf quadripinnate; pinnae varying 
from linear-lanceolate and entire to oblong and crenate-den- 
tate. 
PTERIS EXCELSA Gaud. Voy. Freyc. Bot. 388. 1829 
Pieris terminalis Wall. Cat. no. 101. 1828 (nomen). 
Pteris owahuensis Presl, Tent. Pterid. 145 (nomen). 1836. 
Type LocaLity: Hawaiian Islands. 
Distripution: In damp gulches at elevations of 600-900 m.; 
Northern India, Malaysia, and Fiji Islands. 
ILLUSTRATION: Hook. Sp. Fil. 2: 136. 1846. 
SPECIMENS EXAMINED: Hawaii, Robinson 226 V; 235 V; Maui, 
Bailey C; Robinson 306 V; Oahu, Forbes BM; Hillebrand 407 V; 
Robinson 104 V; Kauai, Heller 2649; Hawaiian Islands, Baldwin 18; 
Wilkes Expedition 11 C; Miss Sessions C. 
PreRIs CRETICA L. Mant. 130. 1767 
Pteris nervosa Thunb. Fl. Jap. 332. 1784- 
Pteris serraria Sw. Jour. Bot. Schrad. 18007: 65. 1801. 
P. cretica. 
P. irregularis. 
