Malacothrix. COMPOSITE. 421 



dentate : heads half-inch or more high : outer bracts of the involucre broader and spreading : 

 akeues oblong, with 5 broad ribs and little or no beak : pappus of unequal sparsely plumose 

 bristles, deciduous in a ring. Lam. 111. t. 648; Reicheub. Ic. Fl. Germ. t. 1375. Intro- 

 duced in a few places (as in Illinois, Hull), and as a ballast-weed. (Nat. from En.) 



Var. Japonica, HEGEL. Very hispid with dark bristles, even to the involucre. P. 

 Jafionica, Thunb. Fl. Jap. 299. P. Kamtschatica, Ledeb. Mem. Acad. 1814, & Fl. Alt. iv. 

 159. P. Davurica, Fischer & Hornem. Hort. Hafn. Suppl. 155. Sitka, Mertens, according 

 to Herder. (Occurs on Behriug Island, off Kamtschatka, as well as on the mainland, 

 Japan, &c.) 



P. (HELMI'XTHA) ECIIIOIDES, L., of the Old World., is a ballast-weed of occasional appear- 

 ance near New York and Philadelphia : it is known by the ovate and subcordate foliaceous outer 

 bracts of the .involucre, 3 to 5 in number, and by the narrow inner ones becoming thickened at 

 base in age ; also by the slender beak to the akeue and a densely plumose pappus. 



221. PINAROPAPPUS, Less. (rTirapo's, dirty, Trownros, pappus, this 

 being sordid or fuscous.) Syn. 143 ; DC. Prodr. vii. 99. Single species. 



P. roseus, LESS. 1. c. Glabrous and glaucesceut deep-rooted perennial stems scapiform 

 with a few minute bracts, and monocephalous, or leafy below with a few naked branches, 

 slender, rather rigid : leaves lanceolate and entire, and some pinnatifid : involucre over half- 

 inch high : ligules conspicuous, rose-tinged or almost white. Tro.rimon /.'</ mtriunnm, Scheele 

 in Linn. xxii. 165. High and rocky prairies, Texas, Lindheimer, Writ/Id, &c. (Mex.) 



222. CALYCOSERIS, Gray. (Ka\v a cup, alluding- to the shallow 

 cup at summit of akene, crepts, a Cichoriaceous plant.) New Mexican and Cali- 

 fornian winter annuals, low, branching from the base, glabrous below and glau- 

 cescent ; with leaves pinnately parted into narrow linear lobes, and showy rather 

 large heads terminating the branches ; the ligules elongated ; peduncles sparsely 

 or copiously hispid with tack-shaped glands. Fl. spring. PL Wright, ii. 104, 

 t. 14, Bot. Mex. Bound. 106, & Bot. Calif, i. 431. 



C. Wrightii, GRAY. Flowers rose-color : akeues with thick and broad somewhat rugulose 

 ribs and thickish beak. PI. AV right. 1. c. t. 14. New Mexico from the Rio Grande to 

 Arizona and S. Utah ; first coll. by Wriyht. 



C. Parryi, GRAY. Flowers yellow : alienes more slender, 5-angled by the acute ribs, with 

 narrower beak and smaller apical cup. Bot. Mex. Bound. 1. c. ; Bot. Calif. 1. c. San 

 Diego Co., California, to S. Nevada and adjacent Utah ; first coll. by Parry. 



223. MALACCJTHRIX, DC., extended. (MoXaKo's, soft, 6p& hair.) 

 W. N. American herbs, leafy-stemmed or sometimes scapose ; with pedunculate 

 heads usually nodding before anthesis : flowers yellow or white, sometimes becom- 

 ing purplish-tinged ; in spring and early summer. DC. Prodr. vii. 192; Torr. 

 & Gray, Fl. iL 485; Gray, PI. Fendl. 113; Benth. & Hook. Gen. ii. 518; 

 Gray, Proc. Am. Acad. ix. 213, & Bot. Calif, i. 432, excl. 3. 



1. MALACOLEPIS, Gray, 1. c. Involucre very broad, of silvery-scarious bracts 

 with only a linear central portion green, regularly imbricated in several series ; 

 the short outer ones orbicular ; inner from oval to oblong-lanceolate : receptacle 

 bearing slender persistent bristles : corollas white, closed in sunshine, purplish- 

 tinged in fading : broad-leaved annual. 



M. Coulteri, GRAY, 1. c. A foot or two high, rather stout, glabrous : leaves oblong or 

 spatulate, upper cauliiie ovate or cordate and clasping, sparsely laciniate-dentate : heads 

 terminating loose branches, short-peduucled, hemispherical, over half-inch high : akenes 

 acutely about 15-ribbed and 4-5-angled, the summit obscurely denticulate by projection of 

 the ribs : one or two stouter pappus-bristles more persistent. S. California, from the 

 Mohave desert to San Luis Obispo, c. ; first coll. by Coulter. 



