Maxon — Lip-ferns Related to Cheilanthes myriophylla. 151 



the numerous cilia of the reduced under scales closely entangled; cells of 

 the scales irregular, with deeply sinuous partition walls; tertiary seg- 

 ments simple to ternately divided or sometimes fully pinnate; ultimate 

 segments in general very small, flattish, close, sessile, subcordate-orbicu- 

 lar (the terminal ones larger and relatively longer), above glabrous, but 

 with the recurved cilia of some of the large dorsal scales and the slender 

 divisions of reduced filamentous scales of tbe upper side of the rachises 

 lying among and partly over them; sporangia rather numerous, borne 

 partly within the narrowly revolute border of the segments nearly 

 throughout, the margin crenulate, nearly unchanged. Leaf tissue rigidly 

 spongiose-berbaceous, dull green. 



This species was described originally from specimens collected " on a 

 mountain about forty miles from San Diego, California," at an elevation 

 of about 750 meters, by Daniel Cleveland, in 1874. Its range is stated by 

 Parish* as "mountains of San Diego County [California] , north to Beau- 

 mont, Riverside County, and south into Lower California. " The num- 

 erous specimens in the National Herbarium are all from San Diego and 

 Riverside counties with tbe exception of the following, these apparently 

 extending the accepted range of the species: Bartlett's Canal, Santa 

 Barbara, California, 1875, Rothrock 60, labelled by Davenport "a large 

 form of C. gracillima;" Santa Cruz Island, California, August, 1893, 

 Yates; same locality, July 17, 1917, Eastwood 6399. 



Although occasional specimens of the common California plant here 

 called C. Covillei have been determined as C. Clevelandii, true C. Cleve- 

 landii has rarely been misidentified. In its large size, slender, woody, 

 appressed-paleaceous, creeping rhizome, stout, light brown stipes, spaced 

 pinnules, and general scanty aspect it is well marked, as also in the sub- 

 cordate form of its pinnules and their dense covering of closely appressed, 

 small, deltoid-ovate, richly colored scales. It is more copiously fertile 

 than most related species, the sporangia less concealed and extending 

 almost to the extreme base of the segments. Its nearest ally, apparently, 

 is C. Covillei. 



* Fern Bull. 12: 7.1904. 



