CATALOGUE. 335 



ceous, often cEaffy beneath on the midrib, very sharply and often doubly 

 serrate; the teeth with commonly appressed needle-like points, the base of 

 the pinnae auricled on the upper and obliquely truncate on the lower side; 

 sori abundant, forming a row each side the midrib midway between it and 

 the margin.— Enum. Fil. p. 236. Hooker, Sp. Fil. iv, p. 10, t. 219. 



California generally, extending through Oregon to Nntka in the north and Guadalupe Island 

 (Palmer) in the south. The largest and fineBt specimens are from Crescent City {Brewer), and Port 

 Orford, Oregon (Gen. Kaulz). One of the handsomest of American Ferns, and, like many others, subject 

 to considerable variations. The shaggy covering of the stalks and rachis consist usually of largo 

 cinnamon-brown chaff, intermixed with much smaller acuminate scales of the same color, but sometimes 

 the color is much darker, and the scales mostly confined to the very base of the stalk. 



Yar. nudatum. 



Frond smaller, the scales almost entirely lacking; pinnae few and 

 rather remote, short and broad, oblong-oval, the teeth closely appressed; 

 sori scanty, on the ends of the few uppermost pinnae. 



Nevada Fall, Yosemite, Prof. Wood. Also from Moore's Flat, on the Yuba Eiver, collector 

 unknown. The lower portion of the stalk is missing : this was probably somewhat scaly, but the part 

 preserved, and the whole frond, are absolutely naked, and have a pale, almost glaucous appearance. 



Yar. imbricans. 



Frond smallish, not narrowed at the base; pinnae crowded, lanceolate- 

 oblong, pale, ascending and imbricated; fruit-dots nearer the margin than 

 the midrib ; stalk with shining brown lance-acuminate scales at the base, 

 otherwise almost naked, as are the rachis and the frond. 



Eed Mountain, Mendocino Co. (Kellogg). Mts. near Trinity Eiver (Prof. Wood). Plumas Co., 

 Mrs. Austin. Still another form, with ample fronds, broad and somewhat incised pinns, and scattered 

 sori, was collected by Dr. Lyall near the 49th parallel. 



**Fronds bipinnate, or nearly so. 



Aspidium aculeatum, Swartz. 



Rootstock stout, erect; stalks of variable length, commonly very 

 chaffy, with large and small scales intermixed, as is the rachis; fronds 1-2 

 feet long, forming a crown, oblong-lanceolate, pinnate; pinnae closely 

 placed, lanceolate from a broad base, mostly curved upwards, incisely 

 pinnatifid or again pinnate; the lobes or segments of variable shape, oval- 

 rhomboidal, or unequally triangular-ovate and auriculate on the upper side 

 of the slightly stalked base, entire or serrate or incised, the lobes and teeth 

 of all degrees aculeate or needle-tipped; under surface more or less chaffy- 



