22 
FEENS OF THE WEST 
base. Rootstock short, thick, chaffy. 2 to 3 feet high. (^Osmunda , 
L.; Blechnum boreale, Swartz.) 
Damp canyons; Santa Cruz (California) to Oregon, in the coast ranges. A pecu- 
liar fern. 
60. Variety serratlim, Wollaston. (The toothed variety.) 
Margins strongly and doubly serrate. 
Deep ravines, Multoonal Co., Oregon (Howell). 
A very peculiar form [Blechnum doodioides, Hooker), found in British Columbia, 
had the lower half of the fronds sterile and the upper half fertile, and the fruit-dots 
broken up into several short ones on each pinna. 
X. WOODWAB-DIA5 Smith. Chain-Fern. 
Veins forming oblong meshes on each side of the midrib, at least. 
Tall ferns. Dedicated to Woodward. 
A genus of 5 or 6 species. Two or three Asiatic, the rest American. 
61. W. radicans, Smith variety Americana, Hooker. (The 
rooting h.., American variety.) 
Fronds pinnate, almost leathery; pinnte parted ; 8 to 15 inches long, 
2 to 4 wide; final divisions triangular - lanceolate, curved, acuminate, 
spiny-toothed; fruit-dots close to the midrib. Rootstock stout, rising 
somewhat above the ground. 4 to d feet high. ( W. Cha?nissoi, Brack- 
enridge; W. spinulosa, Martens.) 
Mendocino County (California), southward in the coast ranges and the Sierras; ex- 
tending to Guatamala. The typical European form has a bud at the tip of the frond. 
TRIBE V.-ASPLENIE^. 
XI. ASPLENIUM, Linnaeus. Spleenwort. 
Fruit-dots sometimes on the lower side of the veinlets also. Veins 
free in our species. (Greek against spleen^ because of their reputed 
remedial qualities.) 
A genus of 300 species; 18 in the United States. 
* Indusium straight. Fr-onds pinnate ; pinnce very numerous, almost 
sessile. Small ferns. 
62. A. TricllOHianes, L. (The A. like Trichomanes.') 
Stalks I to 5 inches long, nearly black, and narrowly winged as well 
as the rachis. Fronds 2 to 8 inches long, evergreen, linear, rather rigid ; 
pinnae round, oval or oblong ; base wedge-shaped or truncate, entire or 
minutely scalloped; fruit- dots 3 to 6 on each side of the midrib; indu- 
sium very delicate, scalloped or entire. Rootstock thick and short. 
Clefts of rocks. Rare in the west. California, Colorado, Oregon, Washington Ter- 
ritory. Common in the eastern States. Throughout the temperate zone. 
63. Variety mclsiiili, Moore. (The cut variety.) 
Pinnae cut-lobed; lobes often scalloped. 
Southern California. 
64. A. paryilllim, Martens and Galeotti. (The vefj small A.) 
Stalks short. Fronds almost linear, stiff-papery ; pinnae very many. 
