Asplenium.| FILICES. 587 
dupe tri-, quadripinnate; sori at the base of the ultimate 
ements 
Frond t tri-, quadripinnate; sori near ihe apex of the ultimate 
segments 
38. A, aspidioides. 
39. A, Baldwini. 
A. Thamnopteris. No. 1. 
1. A, nidus, L. — Hook. Sp. Fil. III, 77. — Caudex short and thick, 
erect. Frond coriaceous, broad lanceolate, 2—4 ft. long, 3—8’ broad, 
entire, Benaile or tapering to a short stipes; the midrib rounded at the 
, 3/3 apart, all parallel, at 
tween rib and edge. Invol. thin, narrow. — Synops. Fil. p. 190. — T 
nopteris nidus, Presl. — Neottopteris nidus, J. Sm 
Common on trunks of trees in the lower forests. The Birds-nest fern, «Ekaha» of the 
natives. — The species extends from Polynesia through tropical Australia and Asia to 
Mauritius and Madagascar 
B. Euasplenium. Nos. 2—30. 
_ A. trichomanes, L. — Hook. Sp. Fil. III, 136. — Caudex short and 
hic pate ise. erect. Stip. densely tufted, 1—4‘ long, dark-brown, 
wiry, naked, flatly grooved. Frond subcoriaceous, linear, nar- 
Si below, 83—8' X 2—6“, pinnate. Pinnae 15—45 on a side, hori- 
zontal, subsessile, suborbicular or ovate, uneven- sided, the upper half the 
est, and truncate at the base, obtusely crenate. Lowest ORE 
distant and small, stipitate in the middle of an even-sided truncate e. 
Veins pinnate, near Sori linear-oblong, 2—4 on each aes 
confluent with age. — A. densum, Brack. Fil. U. S. E. E. p. 151, pl. 20. 
Maui! Hawaii! on the high mountains from 500 00 ft. upward. Nat. name: «Ow 
ol Spread over both temperate zones of nearly the whole wos and the high iconatiia 
regions of many tropical countries. — he Hawaiian plants have an unusually stron: 
root-stock 
3. A. monanthemum, L.— Hook. Sp. Fil. III, 140. 
Stip. tufted, purple-ebeneous, as well as the rhachi 
glossy. Frond firm membranous, linear, 10—15' x} a | 
rhachis often gemmiferous at the height of the first pinnae or near 
apex, Pinnae 20—60 on a side, horizontal, close, subsessile, stipitate Hf 
the lower angle, dimidiato- icant 2—3" deep, the inferior and inner 
sides se straight, the latter secstia to the rhachis with sharp upper 
angle, the upper and outer sides crenate with rounded upper outer angle. 
west pinnae distant and shorter, semicircular, with the base truncate 
on both sides and stipitate at the middle. Veins not excurrent, ending 
— Caudex as before. 
s, 2—6' long, naked, 
4‘, pinnate; the 
