Pteris. } FILICES. 629 
E. Maui! Ulupalakua. In the simplest forms only the two lowest pairs of pinnae 
are segmented. 
3. P. excelsa, Gaud . Bot. Voy y. Freyc. p. 388. —- Caudex short a 
thick, tinea olotied at the end with narrow lanceolate, light brow cone 
thin hyaline scales of about 1/2‘. Stip. 1'/2—4 ft. long, pale brown or 
purplish, naked, glossy. Frond thin chartaceous, bright green, broad 
oblong, 3—6 ft. in length, bipinnatifid throughout, with a terminal pinna, 
cyatheoid. Lateral pinnae 10—12, slightly Bae subsessile, ovate- 
lanceolate, long acuminate, the lowest shortly stipitate and often bipartite, 
—14‘ long and 3—6‘ broad at the base, all cut ad to the rhachis into 
oblong subfalcate s pean or pinnules, which are 2—5“ broad, subacute, 
entire, the fertile ones often contracting from above the cai sessile 
bate Veins rather dishes once or twice forking. Sori continuous from 
the base to near the denticulate apex. Invol. broad, Bos Sporangia 
and fib. vas. fase. as before. — Agardh, Pterid. p. — Hook. Sp. 
Fil. II, 183, tab. 136. — Synops. Fil. p. 159. — Brack. 1. c. — P. terminalis, 
Wall. — In young fronds only the —— fee of pinnae is pinnatisect. 
On all islands, with the preceding species. Nat. name: «Waimakanui».— Is found also in 
the Himalayas, Ava, the Philipines, Java, New menor New Hebrides, and the Viti Islds 
The largest species of the quadriauri up. The lowest pinnae are not always bi 
partite, and the segments, although separated by ni Ww sinuses in the immature 
e fronds, enclose broader ones alhemiirhg when fertile and contra , sO 
becomes very slight, 
that the difference between our species and P. patens, ok 
considering that in the deeply cut sate of the oie species the costal arches ar 
Doryopteris. — Frond short and broad, pedate, cyatheoid, with 
blackish stipes. Veins anastomosing. Involucre single. Spores tetraedro- 
ose, 
ecipiens, Hook. Sp. Fil. II, 209. — Caudex very short and 
thick, its scales curved, stiff and narrow, 1'/2—2” long, consisting of a 
eroded near the apex 2 
or black, naked and poltabed. Frond subcoriaceous, glabrous, cordate in 
outline, measuring usually 3—6‘ each way, bi-, tripinnatisect, with the 
main mnebia interruptedly (cuneately) winged, the lowest interval some- 
times wingless. Primary segments opposite in 3—6 pairs besides the 
pinnatifid apex, lanceolate, falcate, long- acuminate, the lowest ones del- 
sided, their inferior segments longer and again snag 
the basal one much the longest; ultimate segments triangular ob’ 
falcate, ascending, '/s—1‘long. Veins hidden, anastomosing (nervy. pismo 
Sori broad, continuous along the acute sinus and apices. Inyol. narrow, 
soon reflexed. Annulus with about 20 joints. Spores muricate. 
small central crescent-shaped fib. vas. fase. — Synops. Fil. pe- 
data, Gaud. Bot. Freye. — Bot. Beech. p.107. — Pellaea geraniaefolia, Hook. 
