oo^ FILICES. Notholwna. 



tire or sli"litly crenate : sporangia rather large, blackish, at length emergent from 

 the tomentum. — Torr. Bot. Bulletin, iv. 12, and Ferns of N. Amer. i. 301, t. 39, 

 fig. 11-14. 



In dry rocky places in the soutViern part of the State, and on Guadahipe Island. First col- 

 lected in San Diego County by Prof. Newberry. The tomentum is excee.liugly Ime ; though at 

 first nearly pure white, it gradually becomes more or less hTruguious, while the covering ot tlie 

 stalks wears off, leaving them smooth and faintly shining. 



2 N. Parryi, Eaton. Eootstock short, inclined, laden with narrow rather rigid 

 scales, which are fulvous and often have a blackish niidnerve : stalks 2 to 5 inches 

 hi"h 'dark-brown or blackish, minutely striated, pubescent with spreading jointed 

 whitish hairs : fronds as long as the stalks, oblong-lanceolate, tripinnate ; lower 

 pinnae distant; nltimate segments crowded, roundish-ovate, about one line long, 

 crenately incised, densely covered above with entangled white hairs, and beneath 

 with a still heavier pale-brown tomentum : sporangia blackish, when ripe projecting 

 beyond the margin of the segments. — Amer. Naturalist, ix. 351, and Ferns of N. 

 Amer. ii. 209, t. 74. 



Crevices of dry rocks, Marengo Pass, San Bernardino County (Dr. Parry), and on the eastern 

 slope of San Jacinto Mountain, Mr. IVm. Stout Originally found near St George Utah and 

 since seen also in the mountains of Arizona. It is a smaller fern than the last, and has larger 

 ultimate se<nnents and much coarser tomentum. It more resembles Chcilanthes hvmujimsa, 

 Nutt., but has no involucre, and the pubescence is coarser and more entangled. 



>k * Frond beneath tuaxy-jmlveraceous. — {Cincinalis, Desv.) 



3 N Candida, Hooker. Eootstock creeping, the scales narrow, rigid and 

 nearly black : stalks tufted, 3 to 6 inches long, wiry, black and shining : fronds 

 shorter than the stalks, deltoid-ovate, pinnate ; pinnae lanceolate from a broad base, 

 deeply pinnatifid, the lowest pair having the inferior basal segments much elongated 

 and aoain pinnatifid, the other pairs gradually decreasing to the apex of the frond ; 

 segments oblong, slightly curved, obtuse, minutely glandular above, beneath covered 

 wfth white or yellow Avaxy powder, except on the blackish midribs ; margins slightly 

 revolute, but not covering the intramarginal line of dark-brown sporangia. — Sp. 

 Fil. ii. 116, and v. 110 ; Eaton, Ferns of N. Amer. ii. 21, t. 49, hg. 1-3. N. pul- 

 veracea, Kunze, in Linn;T3a, xiii. 135. K suljyhurea, J. Smith, Bot. Voy. Herald, 

 233 ; Hooker & Baker, Syn. Fil. 373. 



In crevices of sunny rocks ; Spring Valley, San Diego County {Miss A. L.Surbcck), and in 

 several other places in the same county, Cleveland, Parry, Wm. StmU. The Califonna specimens 

 are all rather small, and the color of the waxy powder is pale ye low. Larger fronds, with white 

 powder have been gathered in Western Texas, New Mexico and Arizona, and the range extends 

 southward to Chili, the powder being of all shades from silvery white to orange-yellow. 



4. CHEILANTHES, Swartz. Lip-Fern, 

 Sporangia borne on the thickened ends of free veinlets, forming small and round- 

 ish distinct or somewhat confluent marginal sori, covered by a whitish and mem- 

 branaceous, or sometimes unchanged and herbaceous, common involucre, formed of 

 the reflexed margin of separate lobes or of the whole segment. — Small ferns, with 

 2 to 4 times pinnate fronds, the under surface either smooth or variously covered 

 with hair, wool, scales or waxy powder. 



A "-enns of over sixty species, of which about eighteen are found in the United States. It dif- 

 fers from Notholcena only in the pi'esence of a marginal involucre, which is sometimes so continu- 

 ous as to render the separation of the species from Pellcea very difficult. 



§ 1. Involucres separate, one to each fertile vemfe^. — Adiantopsis, Hooker & 

 Baker. {Adiantopsis, Fee.) 

 1. C. Californica, Mettenius. Stalks densely tufted, dark-brown, glossy, 4 to 8 

 inches Ion" : frouds 2 to 4 inches long, smooth and green on both surfaces, broadly 



