236 ROBINSON: PTERIDOPHYTA OF THE HAWAIIAN ISLANDS 
vernation; veins free; sporangia developed from a group of epi- 
dermal and subepidermal cells, separate or coalescent, in the latter 
case forming boat-shaped or circular synangia. Prothallia green, 
thalloid, large. 
MARATTIACEAE 
Characters of the order. 
MARATTIA Sw. Prod. Fl. Ind. Occ. 128. 1788 
Rootstock tuberous, starchy; leaf blades deltoid, dark green, 
thick, glabrous, bipinnate to tripinnate; stipules two, fleshy, at 
the base of the fleshy leafstalk; venation free; sporangia near the 
ends of the veins, coalescent, forming synangia upon a slightly 
elevated receptacle; these in some species subtended by a pseudo- 
indusium. 
Type species: Marattia alata Sw. 
Maratita Douctast (Pres!) Baker; Hook. & Baker, Syn. Fil. 
441. 1868 
Marattia alata Hook. & Arn. Bot. Beech. 102. 1832. Not M. 
alata Sw. 1788. 
Stibasia Douglasii Presl, Suppl. Tent. Pterid. 16. 1845. 
Gymnotheca Douglasii Moore, Ind. Fil. 121. 1857. 
TYPE LOCALITY: Hawaiian Islands. 
DistRIBUTION: In moist, shady localities, above 600 ™- 
elevation, Hawaiian Islands. 
ILLUSTRATION: Vriese, Mon. Marat. pl. 4. 24. 1853: 
SPECIMENS EXAMINED: Hawaii, Robinson 202 V; Maui, Robir- 
son 329 V; Oahu, Diell C; Kauai, Heller 2770 C, N; Lichtenthaler 
N; Hawaiian Islands, Baldwin 111 C, N; Wilkes Expedition C; 
Hitchcock C; ex Herb. Mt. Holyoke College C; ex Herb. Joha 
Donnell Smith N. 
The fleshy tubers taste somewhat like a turnip and are eate? 
either raw or baked by the native Hawaiians. 
4, FILICALES 
Plants terrestrial or epiphytic (aquatic in Ceratopteridaceae)+ 
varying in habit from minute herbaceous forms to arbo 
