496 C0NTRIJ3UTI01s^S FROM THE NATIONAL HERBARIUM. 



pinutc 12 to 14 pairs, the lowermost nearly or qnilc opposite and distant, 

 niiddlo ones ovate, approximate and inostly alternate, a]>ex of the frond short; 

 basal phmse very miequally and broadly triangular, 11 to 13 <"m. Ion?, 5 to G 

 cm, broad at base, the first inferior pinnule 1 to 4.5 cm, long and 2 to 3 cm. 

 distant from the main raehis, the iirst superior pinnule 1.5 to 2 cm, long and 

 1 to 1,75 cm. distant from the main rachis; pinnules triangular-ovate, those 

 f>f the lowermost pairs of iilnnje relatively narrower with 6 to 9 pairs of 

 approximate narrowly ovate pinnulae and a snbcntire acute terminal se<;ment, 

 im\y the 3 or 4 larger pairs of pinnulie of the lower pinnules again pinnatifid 

 into small ovate segments; under surface glabrate, with a few yellowish hairs; 

 sori conflnent, continuous or occasionally interrupted by a shallow indeji- 

 tation; indusia narrow, membranous* 



Type in the U. S, National Herbarium, no. 572224, this being one of several 

 sheets of Dr. Edward Palmer's no. 187, collected at A'ictoria, State of Tamaull- 

 pas, Mexico, in a river canyon, under overhanging rocks, altitude about 320 

 meters, February 1 to April 0, 1907. Doctor Tahiier's no. 5G3 and no. 5G4 with 

 identical data are the same. Young scmifertile or sterile plants differ in having 

 the fronds almost ternate or subpentagonal, and the final segments obtuse or 

 even roundetl ; in the last particular considerable variation is to be noted also 

 in mature specimens, 



Clicilanthvs acmula is allied to (7. microphyUa, with which indeed it grew at 

 the type locality; but from that species it differs notably in its broadly triangu- 

 lar fronds and far greater subdivision. 



Additional specimens to be referred here are, as represented in the National 

 Herbarium, Dr. C. G, Pringle's 19SS (distributed as C. micropht/Ua), from 

 shaded banks near Monterey, State of Nuevo Leon, Mexico, June 20, 1888; an<l 

 Doctor Palmer's no. 1413 of his ISSO collection from some part of Coahnila 

 or Nuevo Leon. 



Cheilanthes peninsularis Maxon, sp. nov. 



Plant 15 to 17 cm, high, the fronds borne closely; rhizome short-creeping, 

 branching, with comt)act covering of minute acicular Iirownish-striped scales, 

 those of the growing pohit tawny and long-attenuate; stij^e 7 to 10 cm. long, 

 very slender (about 5 mm. in diameter), dark puri)lish brown, sparsely cov- 

 ered with very slender (mostly filiform) tortnoso shrunken yellowish brown 

 scales, mostly appressed and inconspicuous; lamina G to S.5 cm. long, 4 to 5 cm, 

 broad, narrowly ovate, clear bright green, di'cply tripinnatifid, membranaceous; 

 primary and secondary rachises bearing chaff similar in texture and color to 

 that of the stipe but mostly broader, especially that of the secondju-y rachis 

 which is linear-lanceolate, attenuate, tapering from the base, more or less 

 erose; pinnae about pairs, the loAvermost subopposite, with lower Inisal pin- 

 nules somewhat produced, 3 to 3.7 cm. long, subtriangular-ovate, 2 to 2.5 cm. 

 distant from the next pair above, these oblong-ovate; the remaining jumuc 

 spaced, not overlapping, alternate; in general, the larger pinuie deeply bi- 

 pinnatifid, with about G pairs of spaced alternate oblong-ovate pinnules, these 

 oblifpiely and deeiily dividinl into 4 or 5 pairs of alternate ligulale-cuneate 

 lobes ctjunected by a flexuose wing of nearly e(]ual width, the larger lobes again 

 once or several times cleft toward the apex; sori terminal on the solitary 



^ 



veins of the ultimate lobes; indusia formed by the slightly modifled inflexed 

 margins. 



Type in the U, S. National Ih^-barium, mo. 397942, collected by T. S. Bran- 

 degee in the Cape region of Lower California, Mexico, November, 1902. Tliere 

 are in addition two sheets from ?^an Jos6 del Cabo, that is to say, the same 

 region, also collected by Mr. Braudegee, September 10, 1890, All were dis- 



