334 BOTANY. 



or triangular-lanceolate, usually fully bipinnate ; pinnae broadly oblong- 

 lanceolate, the lowest ones broadest and scarcely shorter than the middle 

 ones ; pinnules oblong, incised or doubly serrate, with spinulose teeth, 

 conspicuously veiny; sori large, nearer the midrib than the margin; 

 indusia firm, convex, orbicular, with a very narrow sinus, the edge bearing 

 short-stalked glands. — Aspidium argutum, Kaulfuss, Enum Fil. p. 242. 

 Lastrca rigida, "larger and more developed" Moore, Nat Print British Ferns. 

 Nephrodium rigidum, 1 var. Americanum, Hooker, British Ferns, t. 16; Sp. 

 Fil. iv, p. 120. 



Rocky cations at d hillsides of California, apparently rare east of the Coast Ranges, hut extending 

 northward to Umqua Co., Oregon ( Wilkes Expl. Exped.), and southward to the Sierra Madre, Northwestern 

 Mexico. It is also given hy J. Smith in the Botany of the Herald as found in Panama and the 

 Hawaiian Islands, but I suspect there is some error of either identification or locality. This is related 

 to the last species, and small forms have been mistaken for it, but it has a broader and more compound 

 frond, not or but very slightly narrowed towards the base; the under surface is somewhat glandular, 

 and tho plant very fragrant in drying; the teeth of the segments are softly spinulose, whence the namo 

 chosen by Kaulfuss, and the involucres have a very evident glandular margin. Hartweg's No. 2039, 

 from near Monterey, is this species rather than Filix-mas, to which it has at times been referred. Our 

 Fern differs from the European A . rigidum, with which is was united first by Moore and then by Hooker, 

 ouly in the considerably greater size and the more decidedly spinulose teeth, and I see no good reason 

 for still considering it distinct. The fragrance is equally characteristic of the European plant, and 

 persists many years in herbarium specimens. 



ASPIDIUM SPINULOSUM, var. DILATATUM, a form with dark scales on the stalk and smooth 

 indusia, occurs in Oregon, but does not come withiu our limits. 



$2. POLYSTICHUM. 



Indusium orbicidar and entire, peltate, fixed hy the depressed centre: 

 fronds evergreen, sabcoriaceous; pinna; and pinnules usually auricled on the 

 upper side at the base, and mucronately serrate; veins free. 



*Fronds simply pinnate. 

 Aspidium Ltonchitis, Swartz. 



Utah, in the Wahsatch (TVatson), and near Spriug Lake, Parry. From British Columbia north- 

 ward, and eastward to Montana, Lake Superior, and Canada. Greenland. Northern Europe and Asia, 

 and in the high mountains of Southern Europe and Northern India. 



Aspidium munitum, Kaulfuss. 



Rootstock stout; stalks often a foot long, chaffy, like the rachis, with 

 abundant glossy-brown scales; fronds growing in a crown 1-4 feet long, 

 or even longer, lanceolate in outline, tapering slightly towards the base, 

 pinnate; pinnae very many, linear-acuminate, 3-4 inches long, subcoria- 



