336 FILICES. Kuthulanu. 



tire or slightly cvenate : sporangia rather large, blackish, at length emergent from 

 the tomentiim. — Torr. liot. LuUetin, iv. 12, and Ferns of N. Amer. i. 301, t. 39, 

 fig. 11 -U. 



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

 lected in San Dicj^o County by Pro/. A'cicbcrrij. The touicntuui is exceedingly fine; tiiou<;h at 

 first nearly pure white, it gradually becomes more or less lerrugiuous, while the covering of the 

 stalks wears olf, leaving them smooth and faintly shining. 



2. N. Parryi, E;iton. Kootstock short, inclined, laden with narrow rather rigid 

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

 high, dark-brown or blackish, minutely striated, pubescent with spreading jointed 

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

 pinnie distant ; ultimate segments crowded, rountlish-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. jS'aturalist, ix. 351, and Ferns of N. 

 Amer. ii. 209, t. 74. 



Crevices of dry rocks, Marengo Pass, San Bernardino County {Dr. Purr;/), and on the eastern 

 slope of San Jacinto iMountain, Mr. iV.a. Sluat. Originally found near St. (Jeorge, Utah, and 

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

 nltimate segments ami much coarser tomentum. It more resembles UhcUanlhcs laniujiuosa,- 

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



* * Frond beneath wuxij-pidveraceoua. — {Clncinalls, l^csv.) 



3. N. Candida, Hooker. Kootstock cree[)ing, 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 ; \n\n\x, lanceolate from a broad base, 

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

 and again pinnatihd, the other pairs gradually decreasing to the apex of the frond ; 

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

 with wliite or yellow waxy powder, except on the blackish midribs ; margins slightly 

 revolute, but not covering the intramarginal line of dark-brown si)orangia. — Sp. 

 Fil. ii. IIG, anil v. 110 ; Eaton, Ferns of N. Amer. ii. 21, t. 49, fig. 1-3. N. pnl- 

 veracea, Kunze, in Liniuxia, xiii. 135. ^\ salphurea, J. Smith, JJot. Yuy. Ibnald, 

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



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

 several other places in the same county, Cleveland, Parrij, Wni. Stout. The Calirornia .sprcimens 

 arc all rather small, and the color of the waxy powder is i>ale yellow. Larger fronds, with white 

 liowder, 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, Swaitz. Lir-Fiiix. 

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

 fers from NuiholcKiia only in the presence of a marginal iiivoluciv, which is sometimes so continu- 

 ous as to render the separation of the species from Pcl/ccu vt-iy dilhcult. 



§ 1. Involucres separate, one to each fertile velnlet. — Ani.\.NToreis, Hooker & 

 JJaker. (Adiaulupsis, Fee.) 

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

 inches louy : fronds 2 to 4 inches long, smooth and green on botli surfaces, broadly 



