Perityle. COMPOSIT.E. 321 



outliue, pedately cleft or parted and dissected into short linear lobes: heads subsessile, 3 or 

 4 lines high : involucre canipanulate, of numerous narrow linear bracts : rays none : disk- 

 flowers about 20 (perhaj)s wliite) : akenes linear-oblong, minutely cinereous-hirsute, and the 

 cartilaginous margins somewhat more hirsute ; a short scabrous awn from one angle, of 

 nearly half its length, or this wanting : style-branches slender-subulate, not short and ob- 

 tuse, as said in Proc. Am. Acad. ix. 195. — Luphamia dissecta, Torr. in PI. Wriglit. ii. 81. 

 — Rocks at Presidio del Norte on the Kio Grande, between Texas and Mexico. 



§ 2. Genuine species : pappus a crown of hyaline lacerate squamellas, either 

 somewhat united at base or distinct, rarely obsolete. 



* Siiffniticulose perennial, with cominonh' dissected leaves: rays and perhaps disk-flowers also 

 wliitu. 



P. COronopifolia, Gray. Cinereous-puberulent, many-stemmed from the woody base, a 

 foot or less liigh, slender, leafy: leaves small, somewliat pedately or jjinnately once or twice 

 divided or parted into linear or narrow spatulate lobes, or some coarser and merely trifid : 

 heads disposed to be paniculate, 3 lines high: rays as long, broadly oblong, coarsely 3-toothed 

 at apex : style-tips slender-subulate : akenes narrowly oblong, glabrate on the faces, densely 

 hirsute-ciliate : awns 2, little shorter tlian tiie corolla. — PI. Wriglit. ii. 82, & Bot. Mex. 

 Bound. 82. — Rocks on mountain-sides. New Mexico and Arizona; first coll. by Wrirjht. 

 Varies with roundish merely incisely-cleft leaves. 



* -* Herbaceous, chiefly and perhaps all with annual root, loosely branching, and bearing 

 scattered pedunculate heads: leaves often palmately (left. 



-K- iVkenes thin-margined, hispidulous or hirsutely ciliate: crown of pappus minute or obsolete 

 and awns wanting: style- appendages short, acute. (Perhaps extra-limital.) 



P. Fitchii, Torr. Viscid-pubescent : leaves and involucre nearly of the following species : 

 akenes unknown : ovaries apparently destitute of pappus. — Pacif. R. Rep. iv. 100. — " Cali- 

 fornia, Rev. A. Fitch," in herb. Torr. Probably from the islands : imperfect, seemingly 

 winter specimens. (To this apparently is to be joined var. Palmeri, P. Emoryi of coll. 

 Pa!:ner, no. 44, which has the whole aspect and foliage of P. Californica, var. nuda, but akenes 

 narrowly oblong, somewhat falcately oblique, with a short pappus of numerous squamellsie 

 united into an erose-denticuiate crown. — Guadalupe Island off Lower California.) 



-1— -1— Akenes callous-margined and densely ciliate with long beard : pappus-crown more con- 

 spicuous: awns rarely wanting. 



++ Style-branches with short and obtuse or acute minutely hirsute appendages : rays G to 12, 

 short, the oblong or broader ligule little longer than the tube, perhaps always white. 



P. Californica, Bentu. Somewhat hirsutely pubescent, also viscid and glandular: leaves 

 broadly ovate or roundish-cordate, incisely lobed or more deeply 3-5-cleft and the lobes 

 coarsely dentate : heads fully 3 or 4 lines high and broad : bracts of the involucre narrowly 

 oblong : akenes oblong, densely hispid-villous on the margins, crowned with conspicuou.s 

 scjuamelUc, and with a single more or less barbellate awn of about the length of the akene. — 

 Bot. Sulph. 23, t. 1.5. P. Emoryi, Torr. in Emory Rep. (1848), 142 ; Gray, Bot Calif, i. 397, 

 form with usually more rounded lobed and incised leaves. — Desert-region of the Mohave 

 and Gila, S. E. California and W. Arizona. (Lower California, Guadalupe Island, &c. 

 Now found by many collectors.) 



Var. nuda, Gray, Bot. Calif. 1. c., under P. Emon/i. Awn of the pappus none : 

 otherwise as in the P. Emoriji form. — P. nuda, Torr. Pacif. R. Rep. iv. 100. — With the 

 aristate form and cf)mmoner. (Lower Calif.) 



P. plumigera, Gkay. Flowering branches only seen, small-leaved, viscid-glandular: heads 

 much smaller than in the preceding (narrowish, barely 3 lines high) : akenes oval-oblong, the 

 margins very densely long-villous : awn s(ditary, longer than the akene, sparsely barbellate- 

 his])id. — PI. Eendl. 1. c. — "California," probably Arizona, Coulter. Possibly a late-flower- 

 ing form of the preceding. 



P. microglossa, BicxTir. Merely puberulent, obscurely glandular above : leaves broadly 

 ovate with snbcordate or truncate base, or upper somewhat liastate, incisely dentate, often 

 3-5-lobed : heads 3 lines high : akenes obovate or obovato-oblong, with l)road summit, villous- 

 ciliate margins, and a pair of delicate awns, which barely equal the breadth of the akene and 

 are twice or thrice the length of the crown of squamellaj. — Bot. Sulph. 119; HemsL Biol. 



21 



