580 FILICES. [Cystopteris. 
bi pinnae faleate, acute. A few very short paleaceous surculi, similar to those which oce 
in N. tuberosa, but without buds or tubers, are to be seen in a specimen of the smaller sort. 
12. CYSTOPTERIS, Bernh. 
Sori globose, placed on the back of the veins. Involucre thin, hood-like, 
attached with its broad base below the sorus, free laterally and externally, 
soon reflexed. — Fronds small, Soba two or three times divided. 
Veins free. Stipes asians with the rhizome, holding 2 fib. vas, 
fascicles. Spores bilateral. 
A ll genus, inhabiting the temperate zones of both hemispheres. 
. C. Douglasii, Hook. Sp. Fil. I, 200. — Rhizome short, horizontal, 
the apex covered with curly pees hairs, each consisting of a single 
series of elongate cells, several rising from a common base. Stip. crowded 
at the ends of short branches, 3—8’ ane weak, compre stot stramineous, 
naked, glossy. Frond dark, Sokemsaak oblong, rather obtuse, 4—12‘ long, 
nearly as broad at the base as at the middle, pinnate, with pinnatifid 
0 
8/s—21/2‘ long, subentire near the blunt apex, the lower portion cut into 
ovate-oblong and obovate- obtuse crenate or incised lobes of 3—6“ in 
ength. Sori irregular, placed across the trunk, at the fork or on one 
or both branches of a bifurcation, or on the lower sor of simple veinlets. 
Invol. semiorbicular when young, with an emarginate base, almost as in 
Nephrodium, dentate but glandless, very ee. ges of 14—16 cells. 
Spores muricate. — C. fragilis, Synops. Fil. p. 103 
o Leeward side of Mauna Kea, near Waihu, Hawaii! 6000 ft.; Haleakala above Makawao, 
aui! 
8 var. — Frond brighter and more tender, ovate-lanceolate, acute, more. 
open; the rhachis margined only in the upper portion. Lowest pinnae. 
longest, 1—21/2‘, ovate-lanceolate, acuminate, cut deeply into narrow-oblong 
or linear-oblong obtuse segments or pinnules. Sori on the outer halves. 
of simple veinlets or fork-branches, nearer the margin. Some veins eX- 
current in the sinus of an ae os bisine as in C. alpina. — C. Sand~ 
wicensis, Brack. Fil. U. 8. E. E. 
Oahu! Makaleha of the solr range; W. Maui! Distinct from C. fragilis 
1 on 
and the s j : 
of C. fragilis, a. bf accompanied by the broad transpare t scales athe g their pers 
altogether ibe 
13. SADLERIA, Kaulf. 
‘Sori linear, continuous on each side of the costa, parallel and close to 
it. Involucre firm, linear, attached to the outside of the an and. 
