CATALOGUE. 313 



rather distant pinnae oblong-ovate; pinnules roundish- ovate, eremite and 

 incised; the ends of the lobules reflexed and forming herbaceous involucres; 

 segments at length flat. — Bulletin of the Torrey Botanical Club, vi, p. 33. 



Canon 15 miles north of Santa Barbara, California (Mrs. EUwood Cooper); Sierra Valley (J. G. 

 Lemmon), and near San Bernardino, Dr. Parry. This has much the appearance of the eastern C. vestita, 

 which ranges from New York to Kansas, but which has never been found west of the Rocky Mountains. 

 In C. vestita, the hairs are always very acute, while in the present species they aro usually tipped with a 

 glandular and viscid enlargement. The rootstock appears to be short, and its scales are soft and of a 

 deep ferruginous brown. 



$3. PHYSAPTERIS. 



Ultimate segments minute, rounded ; involucre usually continuous all round 

 the margin ; fronds, in all our species, 2-3-pinnate, with the loiver surface 

 tomentose or scaly, the tomentum or scales at first white, often becoming tawny 

 as the fronds mature. 



*Frond tomentose beneath, but not scaly {except on the rachises in C. 

 Eatoni). 



-(- Upper surface naked or nearly so; frond rarely more than twice pinnate. 



Cheilanthes gracillima, D. C. Eaton. 



Rootstocks creeping, branched, and forming a dense entangled mass, 

 scaly with narrow rigid dark-ferruginous chaff; stalks slender, dark 

 chestnut-brown, glossy, 3-4 inches long; frond 1-4 inches long, linear- 

 oblong, bipinnate; primary and secondary rachises bearing delicate nar- 

 row bright-brown scales, as do the stalks when young ; pinnae many pairs, 

 crowded, 3-6 lines long, pinnately divided into about 9 closely placed 

 oblong-oval ultimate pinnules, which are rounded and at first slightly 

 webby above, soon smooth, f-1 line long, beneath heavily covered with 

 pale-ferruginous matted wool ; involucres yellowish-brown, formed of the 

 continuously recurved margin. — Botany of Mexican Boundary, p. 234; 

 Hooker & Baker, Syn. Fil. p. 139. C. vestita, Brackenridge, Ferns of U. S. 

 Exploring Expedition, p. 9 1 (not of Swartz). 



In rocky places, mostly at high elevations, 6000-8000 ft., from the Yosemite to Oregon. Sacra- 

 mento Valley, Brackenridge. Mendocino Co., Eellogg $■ Harford. Near Pend d'Oreille Kiver, British 

 Columbia, Lyall. Readily distinguished from the other species of this section of the genus by tho naked 

 upper surface of the pinnules, and by the rarely more than bipinnate fronds. Tho Meudocino County 

 specimens and those from Sacramento Valley exceed the common dimensions a little; and in these there 

 is a slight tendency towards a thrice pinnate condition of the frond. Called "Lace Fern" by visitors to 

 the Yosemite. 



