CATALOGUE. 303 



ordek. filices. 



Suborder. POLYPODIACEiE. 



Tribe I. POLYPODIEJ1. 

 I. POLYPODIUM. Linn. 

 Polypodium vulgare, Liuu. 



Mount:. in- of Colorado (Ball and Barbour, Vaney), and on rocks at the Twiu Lakes, Wolf. 

 Cottonwood Caiiou, Wahsatch Mts., Watson. The Colorado plants are uniformly small as compared 

 with the common eastern form, measuring from less than an inch up to three inches high, and pro- 

 portionately narrow. The segments are small and numerous for the size of the plant. The Wahsatch 

 specimens are rather larger, hut narrow, and with very ohtuse segments, much as in Oregon specimens. 

 In British Columbia and Unalashka, the species nearly resumes its eastern character. 



Var. occidentale, Hooker. 



Frond ample ; 6-10 inches long ; segments long-pointed, sharply ser- 

 rated towards the point; texture chartaceous. — Flor. Bor. Am. ii, p. 258. 



From San Francisco and Benicia northwards, often growing on trees. This form of the species 

 scarcely deserves to he separated as a variety, especially since nearly similar forms occur in Europe, and 

 more rarely in the Atlantic States. 



POLYPODIUM FALCATUM, Kellogg, Proc. Cal. Acad, i, p. 20, (P. Glycyrrhiza, D. C. Eaton, in 

 Sill. Jour. July, 185G, p. 138), with larger and thinner fronds (12-15 inches long), the segments numerous 

 (3-4 inches long), tapering from a broad base to a very slender point, sharply serrate, veins free, with 

 mostly four veinlete, fruit-dots smallish, nearest the midrib, occurs outside of our limits, but may possibly 

 be discovered within them.— Shoalwater Bay, Washington Territory, J. G.Swan. Port Orford, Oregon, 

 Gen. A. V. Kautz. Usually on trees: considered a form of P.vulgare by Mr. Baker (Synopsis Filicuni, 

 p. 334). 



Polypodium (Jaiilbrnicuui, Kaulfuss. 



Rootstock creeping, chaffy with light-brown scales ; stalks straw- 

 colored when dry, fronds from ovate to oblong-lanceolate, pinnatifid to the 

 midrib; segments numerous, mostly oblong-linear, the lower ones narrowed 

 at the base and decurrent, the upper gradually smaller and closer placed, 

 passing into the incised apex of the frond ; texture papery-herbaceous ; 

 veinlets 4-6 to each vein, the lowest veinlet bearing an ovoid or elliptical 

 fruit-dot, the upper ones anastomosing occasionally near the margin of the 

 segment, — Enum. Fil p. 102. P. intermedium, Hooker & Arnott, Bot. 

 Beechey, p. 405. 



California, mostly near the coast, from San Diego and Guadalupe Island northward. Plant in 

 general resembling P.vulgare, the fronds usually of ample size, 10-18 inches high, 3-5 inches broad. It 



