Cheilanthes. FILICES. 337 



deltoid-ovate, delicately quadripinnatifid ; the upper portion of the main rhachis and 

 all its divisions with a narrow herbaceous border ; lower pinnae much the largest, 

 triangular-ovate, more developed on the lower side ; upper pinnae gradually smaller 

 and simpler ; ultimate pinnules lanceolate, very acute, incised or serrate ; when 

 fruiting, with mostly separate crescent-shaped meinbranaceous involucres in the si- 

 nuses between the teeth, which are often at length recurved. Cheilanthes, 44; 

 Eaton, Ferns of N. Amer. i. 45, t. 6, fig. 2. Hypolepis Californica, Hooker, Sp. 

 Fil. ii. 71, t. 88, A. 



In moist ravines and shady canons, not rare in the Coast Ranges of the southern counties, and 

 also sent from near Santa Cruz by Bolander, and from Sonoma County by W. A. T. Stration, 

 who finds it covering an immense rock of sandstone on Dry Creek, a branch of Russian River ; 

 Sonora, Mexico, Scliott. This is a very delicate little fern, with evident relationship to 0. Schim- 

 peri, and having very little iu common with the genus Hypolepis, in which it is placed by 

 British writers. 



2. Involucres more or less confluent, usually extending over the apices of several 

 veinlets, but scarcely continuous all round the segment : segments not 

 bead-Like. EUCHEILANTHES, Hooker & Baker. 



2. C. viscida, Davenport. Stalks tufted, 3 to 5 inches high, wiry, dark-brown 

 or blackish and shining, chaffy at the base with narrow bright-ferruginous crisped 

 scales : fronds herbaceous, minutely glandular and everywhere viscid, 3 to 5 inches 

 long, narrowly oblong in outline, pinnate with 4 to 8 rather distant pairs of nearly 

 sessile deltoid bipinnatitid pinnae 5 to 8 lines long and nearly as broad ; segments 

 toothed, the minute herbaceous teeth recurved and each covering from 1 to 3 spo- 

 rangia. Torr. Bot. Bulletin, vi. 191; Eaton, Ferns of the Southwest, 311, and 

 Ferns of N. Amer. i. 85, t. 12, fig. 1. 



Downieville Buttes and on bluffs at the White Water River in the Colorado Desert (Lemmon), 

 and near San Gorgonio Pass, Parry, Lemmon. The obvious affinity of this species is with 

 C. Wrightii, from which the viscid and more dissected fronds and the herbaceous involucre abun- 

 dantly distinguish it. 



3. C. Cooperae, Eaton. Stalks densely tufted, 1 to 4 inches long, dark-brown, 

 fragile, hairy like tiie frond with entangled or straightish nearly white articulated 

 often gland-tipped hairs : fronds 3 to 8 inches long, ovate or ovate-lanceolate, bipin- 

 nate, the rather distant pinnae oblong-ovate ; pinnules roundish-ovate, crenate or 

 crenately incised, the ends of the lobules reflexed and forming herbaceous invo- 

 lucres ; segments at first slightly concave, becoming flat at maturity. Torr. Bot. 

 Bulletin, vi. 33, and Ferns of N. Amer. i. 7, t. 2, fig. 1. 



Clefts of rocks in canons and on the sides of mountains ; near Santa Barbara ( Mrs. Elwood 

 Cooper, Mrs. Stanley Bagg); Santa Clara County (H. G. Isaman) ; Downieville Buttes (Lem- 

 mon) ; near San Bernardino, Lemmon, Parry, W. G. Wright. Related to the eastern C. veslita, 

 Init in that fern the hairs are always acute, and the frond has a narrower outline. The drawing 

 above cited does not give a good idea of the plant. 



3. Ultimate segments minute, bead-like ; involucre usually continuous all round 

 the margin : fronds 2 - ^-pinnate, the lower surface tomentose or scaly, 

 the covering at first ivhite, often becoming tawny as the fronds mature. 

 PHYSAPTERIS, Presl. (Myriopteris, Fee.) 



* Ultimate segments tomentose beneath, but not scaly. 



4. C. gracillima, Eaton. Rootstocks creeping and assurgent, forming a dense 

 entangled mass, chaffy with narrow rigid dark-brown appressed scales : stalks slen- 

 der, dark-brown : fronds 1 to 4 inches long, linear-oblong, bipinnate or sometimes 

 partly tripinnate ; primary and secondary rhachises bearing delicate narrow bright- 

 brown scales, as do the stalks when young ; pinnae many pairs, crowded, 3 to 6 

 lines long ; ultimate pinnules crowded, oblong-oval, f to 1 line long, at first webby 

 above, soon smooth, beneath heavily covered with ferruginous matted wool ; invo- 

 lucres yellowish-brown, formed of the continuously recurved margin. Bot. Mex. 



