142 COMPOSITE. Bigelwitb 



§ 5. AplodisctJs, Gray, 1. c. Heads several-many-flowered : bracts of the 

 involucre either coriaceous or firm-chartaceous, and usually somewhat herbaceous 

 or thickened at the obtuse or barely acute apex, all strictly appressed and well 

 imbricated, but the vertical ranks inconspicuous : style-appendages subulate- 

 lanceolate or broader, shorter than the stigmatic portion : akenes short, sericeous- 

 pubescent: herbaceous or suffruticose, commonly more or less balsamic- viscid : 

 leaves not punctate, sometimes dentate or pinnatifid. — Aplopappus § Aplodiscus, 

 DC. Prodr. v. 350, excl. A. ramulosus, which is a Baccharis. 



# Herbaceous down to suffrutescent base: leaves linear: bracts of the involucre thin-coriaceous or 

 almost cbartaceons, and with obscure if any greenish tips. 



B. pluriflora, Gray, I, c. Leaves narrowly linear, entire: heads 15-18-flbwered, 4 lines 

 high : involucre somewhat turbinate, very smooth ; its thinnish bracts lanceolate, acute : 

 otherwise like the next, of which it is perhaps a mere form, but is insufficiently known. — 

 Chrysocoma graveolens, Torr. Ann. Lye. N. Y. ii. 211, not Nutt. Linosyris pluriflora, Torr. 

 & Gray, Fl. ii. 233. ^— Colorado 1 probably on the Arkansas or South Fork of the Platte, 

 James in Long's expedition. 



B. "Wri.gh.tii, Gray, 1. c. Commonly glabrous or nearly so : stems rather strict and slender, 

 a foot or two high from the lignescent base : leaves thickish, narrowly linear, entire, some- 

 times lower ones sparingly laciniate-dentate, margins either smooth or sparingly hirtello- 

 scabrous : heads (4 or 5 lines high) 7-15-flowered, usually numerous and crowded in a 

 corymbif orm cyme : bracts of the involucre oval-oblong to broadly lanceolate, obtuse ; the 

 back at or near the apex usually greenish, but no definite tip. — Linosyris Wrightii & L. 

 heterophylla, Gray, PI. Wright, i. 95, ii. 80. — Banks of streams and in saline soil, W. Texas 

 to S. Colorado and Arizona ; first coll. by Wright. 



Var. hirtella. Leaves cinereous-hirtellous or hirsute-pubescent and roughish, but 

 often glabrate in age or only ciliolate : stems sometimes pubescent. — Linosyris hirtella, 

 Gray, PI. Wright, i. 95. — Same range ; first coll. by Wright. 



# # Suffrutescent: leaves linear-filiform and pinnately parted : involucre nearly of the preceding. 



B. coronopif olia, Gray, 1. c. Glabrous : stems freely branching, slender, a foot or two 

 high, leafy : divisions of the leaves 3 to 9, often half-inch long, not thicker than the filiform 

 rhachis, setulose-mucronate : heads somewhat thyrsoid-glomerate (4 or 5 lines long), 10-12- 

 flowered. — (Excl. pi. Arizona, Palmer.) Linosyris coronopif 'olia , Gray, PI. Wright, i. 96. — 

 S. Texas along the Rio Grande, Wright, Bigelow, Havard, Palmer. 



# # * Suffruticose : bracts of involucre more coriaceous and more definitely greenish-tipped. 



■**- Leaves all entire (or rarely a tooth or two), linear or spatulate-linear : branches partly her- 

 baceous: glabrous. 



B. Drummondii, Gray, 1. c. About a foot high, with many slender erect or ascending 

 branches or stems from a woody base: leaves all narrowly linear, with tapering base (inch 

 or two long, seldom over a line wide) : heads 5 or 6 lines high, rather numerous in a corymbi- 

 form cyme, 18-30-flowered: involucre campanulate; its bracts linear-oblong, with obtuse 

 or obtusish and short green or greenish tips: pappus rather soft. —Linosyris Drummondii, 

 Torr. & Gray, Fl. ii. 233. — Coast of Texas, and Lower Rio Grande ; first coll. by Berlandier, 

 Drummond, Triad. E. Arizona, Rushy. (Adj. Mex., Palmer.) 



B. acradenia, Greene. A foot or so high, very many slender stems or branches forming 

 broad tufts from a woody base: leaves spatulate-linear (half -inch to inch long), entire or 

 rarely some small teeth: heads glomerate-cymose, 4 lines high, 10-20-flowered: involucre 

 campanulate, of more rigid oblong bracts, the back at the obtuse apex bearing a protuber- 

 ant rounded resiniferous gland: pappus rigid, of very unequal bristles. — Bull. Torr. Club, 

 x. 126. — Mohave Desert, S. E. California, Greene, Parry, Jared, &c. S. Utah, Palmer. 

 Transitions apparently occur between this and the next. 



-f— -i- Leaves serrate, dentate, or pinnatifid, occasionally entire : shrubby, 2 to 4 feet high. 

 B. verieta, Gray. Glabrous, or the herbage when young loosely pubescent, or almost to- 

 tnentose : leaves short (half-inch or lower twice or thrice this length), spatulate or oblan- 

 ceolate, or sometimes cuneate-oblong, sparsely or irregularly spinulose-dentate or serrate, or 



