320 COMPOSIT.E. Lapluimia. 



L. Lindheimeri, Gray. Stems a foot or less high from a thick woody base : leaves thiri- 



• ner, oblimg or o\ ate, glabrous, few-toothed or some entire, contracted at base into a short 



jjetiole : heads loosely cymose ; rays 3 to 6, very short, sometimes none : pappus a single 



slender bristle equalling the proper tube of the corolla. — PI. Wriglit. i. 101 . — Eocky banks 



of the Guadalupe, near Xew Braunfels, Texas, Lindheimer. 



* * * Involucre 35-50-flowered, of numerous carinate-concave brae's, somewhat puberulent or 

 glandular on the back ; herbage minutely puberulent : leaves thickish. 



-i — riowers said to be white : leaves mostly opposite, numerous up to the heads, dentate. 

 L. Palmeri, Guav. Scabrous-puberulent : leaves broadly ovate or deltoid-rotund, rigid, 

 coarsely S-7-dentate or laciniite-lobed, half-inch long, veiny, abruptly short-petioled : heads 

 somewhat crowded on the fastigiate flowering branches, little surpassing the upper leaves : 

 involucre campanulate, about 35-flowered ; its bracts linear, somewhat pubescent : rays none : 

 pappus a bristle of the length of the akene and a little shorter than the corolla. — Proc. Am. 

 Acad. xiii. 372. — Cailons at Beaver-dam, N. W. Arizona, pendulous from rock-crevices. 

 Palmer, who notes that the flowers are " creamy white." 



-I— -t— Flowers 3'ellow: leaves small, 2 to 4 lines long, mostly orbicular, more entire, the upper 

 alternate, scattered : heads solitary and naked, terminating the loose branchlets, nearly hemi- 

 spherical. 



L. megacephala, "Watsox. Base of stem and lower leaves unknown ; those of flowering 

 branches all very small, alternate, short-petioled : in^ulucre about 50-flowered ; its bracts 



lanceolate-linear, minutely glandular: rays none: pappus none. — Am. Nat. vii. 301. 



8. Xevada, Wheeler. 



L. Stansbtirii, Guay. Stems slender and lax from a woody base : lower leaves opposite 

 and on petioles of their own length ; upper alternate, also slender-petioled : involucre 35-40- 

 flowered, its bracts fewer and broader, lanceolate-oblong, nearly glabrous : ravs 6 to 10, con- 

 spicuous, oblong: pappus a bristle somewhat shorter than the disk-corolla. — PI. Wright, 

 i. 101 ; Eaton in Bot. King Exp. 164. Momthrix Stanshurii, Torr. in Stansb. Rep. 389, 

 t. 7. — Eocks on Stansbury Island, &c.. Salt Lake, Utah; first coll. by Stanshury. 



§ 3. DiTHEix. Pi^ppus a pair of stouter naked bristles, one from each angle 

 of the akene : head only 6-8-flowered. 



L. bisetosa, Tore. Hispidulous-pnberulent, minutely resinous-atomiferous and punctate: 

 stems 1 to 3 inches high from the woody base : leaves mostly alternate, coriaceous, spatulate- 

 ovate, obscurely few-toothed (quarter-inch long including the petiole) : heads solitarv and 

 sessile: rays none: involucre (3 lines long) with bracts broadly linear, slightly pubescent, 

 carinate-concave at base: flowers proportionally large: corolla "(whitish or pale vellow ?) 

 with glandular tube one-third the length of the campanulate cylindraceous throat": akeues 

 hispidulous-puberulent, the narrow marginal nerves naked : rigid awns rather shorter than 

 the akene, more than half the length of the corolla. — Gray, PI. Wright, ii. 1011. — On the 

 Eio Grande, Texas, in a canon below Presidio del Norte, Parry. 



135. PERfTYLE, Benth. (Jiepi, around; TuX?y, a callus; the akenes 

 calloiw-maroi-aed.) — Californian and Mexican herbs, the genuine species mostly 

 annuals ; with petiol.;ts dentate or palmately-lobed leaves, lower opposite, upper 

 alternate, and small or middle-sized pedunculate heads terminating the branches : 

 disk-flowers yellow (or sometimes white?) : rays when ,iresent vellow or white.— 

 B:.t. Sulph. 23 & 110, t. lo ; Gray, PI. Fendl. 77, Proc. Am. Acad. ix. 19-1, & 

 Cot. Calif, i. 39G. 



P. 7NCAXV, Gr.ay, Proc. Am. Acad. xi. 78, from Guadalupe Island, ofe Lower California, is 

 an outlying auomabius species : all the others are as follows. 



§ 1. Crown of the pappus an entire or undulate firm and shallow border: 

 akene hardly ciliate : suffruticulose : transition to Laphaniia. 

 P. dissecta, Gray. Dwarf, ,3 or 4 in.-hes high from the woodv base, oinereous-pube.scent, 



very leafy : leaves with blade (qnartcr-inch long) equalled by the petiole, round-cordate iu 



