Vol. 40. er A K No. 5 
BULLETIN 
‘TORREY BOTAN ICAL CLUB 
A taxonomic study of the Pteridophyta of the Hawaiian Islands—Ill 
WINIFRED J. ROBINSON 
(WITH PLATES 9-12) 
19. POLYPODIUM L. Sp. Pl. 1082. 1753 
A cosmopolitan genus, including ferns of every habitat. Root- 
stock creeping; leaves articulate; blades various, mostly simple 
or pinnate; veins free or occasionally anastomosing; sori orbicular, 
dorsal on the veins, non-indusiate. 
Type species: Polypodium vulgare L. 
Leaves simple to deeply pinnatifid, not bearing reddish, 
resinous glands beneath. 
Leaves simple 
Margin entire or very slightly undulate. 
Rootstock creeping, 5-8 mm. in diameter, the 
scales light brown; leaves 8-20 cm. X 7.5- 
10 mm. 
Leaves stalked, — with numerous 
r ish brown ts 2-3 mm. long; margin 
entire; sori inframedial. P. Hooker. 
Leaves sessile, pubescent with scattered 
eis hairs less than 1 mm. long; margin 
lightly undulate; sori supramedial. 
eine erect or creeping, less than 5 mm. in 
diameter, the scales dark brown; leaves 
P. Knudsenii. 
5-7 cm. X 2-5 mm. , 
Rootstock. erect, rather stout; leaves sub- 
sessile, linear-lanceolate, entire; sori oval, 
numerous., 
Rootstock creeping, wiry; leaves stalked, 
linear, eighty undulate; sori round, few, 
distant. 
P. pumilum. 
'P. pseudogrammitis. 
[The Buttetin for April 1913 (40: 137-192. pl. 3-8) was issued May 9.) 
