396 
BOTANY. 
ingly many-jointed, and their persistent bases remain on the rootstock several 
years. Plate XL. Fig. 17. Plant; natural size. Fig. 18. Sporangia, in 
position ; magnified twelve diameters. Fig. 19. A sporangium ; magnified 
forty diameters. Fig. 20. A sterile frond. (1,361.) 
Pell^a densa, Hook. Sj). Fil 2. 150. {OmjcUum densum, Brackenr. 
BoL of Wilkes s Exp., Ferns, 120, t. 13.) Rootstock short, scaly with 
blackish chaff; stalks clustered, poUshed, dark-brown, 4-10' long, very 
slender and much longer than the ovate densely tripinnate frond ; pinnules 
hnear-oblong, acute, much crowded, 3-5" long, membranaceous or somewhat 
coriaceous ; sterile ones denticulate, fertile ones with the proper margin re- 
curved and bordered with a narrow involucre. — Rogue's River and Fort Or- 
ford, Oregon, to the Yosemite. Rocky gorge above Cottonwood Caiion in the 
Wahsatch; 7,000 feet altitude. (1,362.) 
Ckyptogeamme aceostichoides, R. Brown. {AUosorus acrostichoides, 
8pi-eiigcl.) Arctic America and Alaska to California, and eastward to Lake 
Superior. In the Clover Mountains, Nevada, and in the Wahsatch and Uin- 
tas ; 9-10,000 feet altitude. (1,363.) 
Asplenium Filix-fcemina, Bernh. Throughout Europe and much of 
Asi:» and Africa. America from Alaska and Labrador to Venezuela. In the 
East Humboldt Mountains, Nevada ; 6-7,000 feet altitude ; a form with am- 
ple fronds of delicate texture, 2J-3J° high. (1,364.) 
Var. Michauxii, Mettenius. Fil. Hort. Lips., p. 79. {A. angiistum, 
Willd.) Fronds somewhat rigid and much narrower in outhne, bipinnate ; 
pinnae narrowly lanceolate, usually diverging from the rachis at an acute angle 
or curved upward ; pinnules serrated or shghtly lobed ; fruit-dots short; indu- 
sium straight or recurved.— Common from Maine to Lake Superior Cahfor- 
nia, (Brewer.) Rocky side-gorge above Cottonwood Cailon in the Wahsatch ; 
7,000 feet altitude. (1,365.) 
AspiDiUM LoNCHiTis, Swartz. Throughout Europe and in the Hima- 
layas. Greenland and Arctic America to Canada and Lake Superior, and 
\\-csf\vard to Alaska and Oregon. Same locahty with the last; 8-9,000 feet 
aUitude. (1,366.) 
Cystopteris fragilis, Bernh. From Iceland to Tasmania, and from 
Japan westward to tlie Saiulwich Islands. Greenland, Arctic America 
Alaska and Labrador to Chili. In the AYashoe, AVost Humboldt and East 
Humboldt Mountains, Nevada, and in the Wahsatch and Uintas; 6-9,000 
