558 FILICES. [ Polypodium. 
separated by pellucid streaks which extend from the margin inward. 
Sori at the apex of the first anterior branch, large and round, in two 
straight rows between rib and margins or nearer the former. Sporangia 
with 13—16 joints. Spores verrucose or reticulate. Fib. vas. fasc. 3—6. — 
Bot. Beech. p. 103. — Sp. Fil. IV, 206. -- Synops. Fil. p. 334. — Hook. Ie. 
Pl, tab. 944. — Gaud. Bot. Freye. p. fe — Brack. l. c. p. 10. — Luerssen, 
in Flora, 1875, p. 423. 
Common on the mountains of Hawaii! Maui! Kauai! from 5000 ft. upward. The 
pellucid streaks, owing to a iiieatie of the frond, ogmnige a tendency to split in these 
directions, which is realized to an eminent degree in yar. 6. 
B var. opacum. — — as before, entire, broadest near the ree 
top, but with a tendency to form an auricle at the upper base. Veins 
opaque, excepting the clavate apex. Pellucid streaks wanting or reduced 
to a small dot at the crenature. Stipes longer than the frond. Fib. vas. 
fasc. 8 in a semicircle, the two lowest largest. 
Molokai! pali of Waikolu; a single specimen, searcely differing from P. vulgare. 
7 var. — Segments acute, entire or crenate or coarsely serrate, the 
frond of thinner texture and often narrowing below. Occasionally two 
anterior or two posterior branches of veins anastomose so as to form an 
elliptical ansa; more frequently the first anterior branch ne into two 
branchlets which unite again below the sorus. Fib. vas. fase. 3—6. 
ith w Of-this var., too, I have a Kauai specimen in which the transparency 
of the veins and ro 7: quite indistine tt. 
8 var. bi-pinnatifidum, Hook. Ic. Pl. tab. 945. — Stip. 6—12‘. Frond thick, 
16—20‘, narrowing below, pinnate, its middle pinnae 5—8‘ long, shortly 
decurrent and again deeply pinnatifid in oblong or linear, crenate or 
serrate, rather obtuse segments, of which those about the middle are 
again much the longest and sometimes attain 1'/2’ in length; their veins 
pinnate with veinlets one oMremte Sori large and numerous over the 
whole song Fib. vas. fase. 4—6. — P. myriocarpum, Hook. Ic. PI. tab. 84. 
Rare. ile come from Haleakala on Maui! and from Kauai! The 
outline of t the frond is q irregular, as only one or goreed — here and there in 
creases sand ¢ — soem eeper, while the others remain short and simply 
serrate or laciniate. _ “any eng ey ar. cambricum o = 
The species r to the Wewtas Islands, but altogether ‘resembles P. vulgare 
and —— by fl pen The difference consists in the transparent = and pellucid 
streaks the greater number of fib. vas. paseo and in the occasional 
ma ieecae te between veinlets of the same group 
B. Phymatodes. — Veins anastomosing in fine copious meshes, the sori 
at the ends of free appendages or at their junctions. 
12. P. lineare, Thunb. — Hook. & Baker, Synops. Fil. p. 354. — Rhizome 
creeping, woody, of the size of a crow's quill; its deciduous scales small, 
blackish, stiff, narrow lanceolate, denticulate, rising from a paler orbicular 
base. Stip. at distances of 1/4—1/2', rigid, naked, 1—2’ long. Frond 
