104 COMPOSITE. Briclcellia. 



reach Florida) is widely tropical American, and there is an anomalous species in 

 Brazil. — Sk. ii, 2<J0 ; Benth. Bot. Sulph. 22 ; Gray, PI. Wright, i. 84, & Proc. 

 Am. Acad. xvii. 206 ; Benth. & Hook. Gen. ii. 247. Coleosanthus, Cass. Diet. 

 X. 30. Hoscdesia, Llave & Lex.? Glavigera & BuJhostylis, DC. Prodr. v. 127, 

 138. 



B. iiASTATA, Benth., is a well-marked species of Lov/er California, described in Bot. Sulph. 

 21. In that work the genus was first extended to its proper limits, but made to rest on the 

 bulbous base of the style (which is of little account) instead of the 10-costate akene. 



* Heads 35-50 flowered, large or middle-sized: pappus-bristles merely scabrous or densely- serru- 

 late. 



-i— Herbage whitc-tomentose : leaves rounded, pointless. 



B. incana, Gray. A foot or two high, loosely branched from a suffrutescent base; dense 

 and fine tomentum somewhat deciduous : leaves alternate, sessile, subcordate-rotund or 

 ovate, entire (less than inch long) : heads solitary terminating the brauchlets, inch high, 

 pedunculate : involucre broadly campanulate, pluriserial ; its bracts firm-chartaceous ; short 

 outer ones ovate, inmost lanceolate-linear : akenes (5 lines long) cinereous-jjubescent. — Proc. 

 Am. Acad. vii. 350, & Bot. Calif, i. 300. — S. E. California along the Mohave Eiver, Cooper, 

 Parry, Parish. 



+~ -i— Puberulcnt to almost glabrous: leaves sessile or subsessile, all alternate, not cordate, 

 -K- Rigid-coriaceous, spinulose-pointed and t'lotlied: fruticulose. 

 B. atractyloicles, Gray. A foot or less high, woody except the new shoots, much 

 branched : leaves ovate, acuminate, bright green, minutely scabrous-atomiferous, 3-nerved 

 and reticulate-veined (an inch or less long) : branchlets terminating in a solitary (half-inch 

 long) and slender-pedunculate head : involucre campanulate ; its bracts firm-chartaceous ; 

 outer ovate, acuminate, little shorter than the linear-lanceolate innermo.st. — Proc. Am. 

 Acad. viii. :29G. — RcK'ky ravines, S. Utah {Palmer, Parrj/) to S. E. California. 

 ++ ++ Loaves not coriaceous, pointless, seldom an inch long, sometimes viscidulous: stems her- 

 baceous fr.ni a Jignescent ba=e or stock, a span to a foot or so high, leafy to the top: heads 

 jnostly singly terminating corymbose leafy branches. 

 = Heads three fourths of an inch long, involucrate'y surrounded or subtended by small upper- 

 most leaves. 

 B. Greenei, Gray. Very viscid : leaves ovate, obtuse, minutely more or less serrate, and 

 the lower short-petioled ; upper oblong and often entire, uppermost forming accessory loose 

 bracts to the involucre : proper involucral bracts lanceolate and linear, acuminate, glabrous : 

 akenes not glandular, glabrous, or at tlie upper part hirtellous with a few scattered short 

 bristles on the ribs. — Proc. Am. Acad. xii. 58. — N. E. California, on Scott River, Greene. 



= = Heads two-thirds or over half inch long, naked at base, connnonly somewhat peduncled: 

 leaves entire, rare)}' with a tooth or two, obscurely 3-nerved, puberulent and minutely some- 

 what grar;(Udar-granulose or atomifcrous, graveolent, becoming slightly viscidulous. 



B. oblongifolia, Xutt. Leaves oblong or some upper ones lanceolate, obtuse or mucro- 

 nate : involucral bracts all acute or mucronate-pointed ; outer and short ones oblong-lanceo- 

 late; inner narrowly linear: akenes sprinkled with minute sessile and stipitate glands, 

 toward summit often a few bristles. — Trans. Am. Phil. Soc. 1. c. 288 ; Torr. in Wilkes 

 Pacif. Exp. xvi. t. 9; Eaton, Bot. King Exp. 137. — In gravelly or dry soil, E. Oregon to 

 Brit. Columliia, first coll. by Nuttall. 



Var. abbreviata, Gray. Dwarf: leaves seldom half-inch long: involucral bracts 

 less acute: akenes minutely and sparsely glandular on the ribs, otherwise glabrous. — Eaton, 

 1. c, t. 15, f. 7-10. — W. Humboldt Mountains, Nevada, Watson. 



B. linifolia, Eaton. Rather more pnbCvScent: leaves oblong-lanceolate to almost linear: 

 involucre of the preceding, or bracts more attenuate-acute : akenes minutely hispid on the 

 ribs, not glandular. — Bot. King Exp. 137, t. 15, f. 1-6. — Sandy banks of streams, &c., 

 Sierra Nevada, California, to Utah and borders of Arizona; first coll. by Watson. 



B. Mohavensis. Low, more cinereous-pubescent, brachiately branched : leaves narrowly 

 oblong : bracts of the involucre obtuse, rather broadly linear, outermost oblong : akenes 

 cinereous-hispidulous : pappus-bristles approaching barbellulate. — Rocky washes in the 

 Mohave Desert, S. E. California, Parish. 



