142 COMPOSITtE. Bigelovia. 



§ 5. Aplodiscus, 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. ramulostcs, which is a Baccharis. 



* Herbaceous down to sufEriitescent base : leaves linear: bracts of the involucre thin-coriaceous or 

 ahnost chartaceoiis, and witli obscure if any greenish tips. 



B. pluriflora, Gray, 1. c. Leaves narrowly linear, entire : heads 15-18-flowered, 4 lines 

 liioli : involucre somewhat tiirl)inate, very smooth ; its thiunish bracts lanceolate, acute : 

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

 Chrysocoma grareolens, Torr. Ann. Lye. N. Y. ii. 211, not Nutt. Li>ios>/ris pluriflora, Torr. 

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

 James in Long's expedition. 



B. Wrightii, Gray, 1. c. Commonly glabrous or nearly so : stems rather strict and slender, 

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

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

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

 corymliiform cyme : bracts of the iuvolucre oval-oblong to broadly lanceolate, obtuse ; the 

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

 hetcrojihylla, 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: invohicre nearlv of the preceding. 



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

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

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

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

 S. Texas along the Kio Grande, Wright, Bigelow, Ilacard, Palmer. 



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

 -f— 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-olilong, 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 Pio Grande ; first coll. by Berlandier, 

 Drumntond, Tre'cul. E. Arizona, Rushy. (Adj. Mex., Palmer.) 



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

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

 rarely some small teeth; heads glonierate-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. 



H— -)— Leaves serrate, dentate, or pinnatifid, occasionally entire : shrubby, 2 to 4 feet Iiigh. 



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

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

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



