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and C. Clevelandii and C. Fendleri have the upper surface
always smooth, though in both C. Clevelandii and C. myriophylla
the cilia of the scales often curl over the upper
surface of the pinnules and simulate pubescence there.
In all these plants the scales are at first whitish, often
silvery-white, and it is only as the fronds mature that the
scales turn gradually to various shades of brown.
The specimens brought by Mr. Stout from Cajon Pass
and San Jacinto mountain in California have a slenderer
root-stock and less ciliated scales than the commoner form,
but on careful study and comparison I can find no good
reason for considering them specifically distinct.
Many specimens of this fern, including all the California
plants and some from western Texas (C. Wright, No. 2126)
have passed heretofore for C. Fendleri.
Kuhn quotes Mettenius as saying that Desvaux’s specimens
of C. elegans, and C. myriophylla are precisely alike.
1-Ie prefers the name elegans, as being more commonly used
in gardens.
Plate LX X IX .— Fig. 8 -15 . Cheilanthes myriophylla, from California.
Fig. I t is part of a pinna, enlarged. Fig. 12 , a pinnule seen from
beneath. Fig 13 , the same with the scales removed, and showing a
few scattered hairs (which are often wanting). Fig. 14, an ultimate
segment denuded and partly opened. Figs. 8, 9, 15 , scales from different
specimens. Fig. 16, a spore.
P l a t e L X X IX .—F ig . 1 7 - 2 1 .
C t lE IL A N T H E S GRA C ILISIMA , D. C. E a t o n .
Lace-Fern.
C h e i l a n t h e s g r a c i l l i m a :— Root-stocks creeping and assurgent,
forming a dense entangled mass, chaffy with appressed
rigid narrow dark-brown scales; stalks slender, two to eight
inches long, dark-brown, at first sparingly chaffy, soon smooth
and shining; fronds usually one to four inches long, linear-
oblong, bipinnate or sometimes partly tripinnate ; primary and
secondary rachises bearing delicate narrow bright-brown scales
ciliated at the base ; pinnæ many pairs, crowded, three to six
lines long; ultimate pinnules crowded, oblong-oval, about one
line long, at first webby above, soon smooth, beneath heavily
covered with matted ferruginous wool ; involucres yellowish-
brown, formed of the continuously recurved margin.
Cheilanthes gracillima, E aton, in Bot. Mex. Boundary, p. 234; Ferns
of the South-West, p. 3 13 . — H o o k e r & B a k e r , Syn. Fil., p.
139-
Cheilanthes vestita, B r a c k e n r id g e , Fil. of U. S. Expl. Exped., p. 91,
not of Swartz.
H a b .—Growing in dense masses among rocks, mostly at elevations
of from 6000 to 8000 feet, from the Yosemite Valley to Oregon. Also
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