116 COMPOSITE. Gutierrezia. 



G. eriocarpa, Gkat. Low or taller (a foot or two liigli) : receptacle obtusely lilgh-conical : 

 pappus of 1 2 or more linear-lanceolate or subulate and mostly dlstiuct paleo3, about half the 

 length of the akene. — PI. Wright, i. 94. — Plains and prairies, S. and W. Texas, Wright, 

 Havard. (Mex.) 



— G. Beelandieri, Gray, Proc. Am. Acad. xv. 31, is an allied species of the northern part 

 of Mexico, with a pappus of numerous minute palese, which do not surpass the silky hairs of 

 the akene. 



§ 2. Pappus wanting in the ray-flowers : ligules comparatively long : habit of 

 the preceding subsection. — Hemiachyris, DC. 



- G. Texana, Tore. &, Grvt. Annual, effusely much branched, 2 or 3 feet high : branches 



slender, bearing the very numerous pedunculate heads in open compound panicles: invo- 

 lucre turbinate-campanulate, a line or two long : ray.s 8 to 10 (3 or 4 lines long) ; disk-flowers 

 as many : akenes minutely pubescent ; those of the disk with a minute pappus of ovate or 

 subulate paleas, of length less than the breadth of the akene. — Fl. ii. 194. Hemiachyris 

 Texana, DC. Prodr. v. 314. Brachi/ris microcephala, Plook. Ic. t. 147, riot DC. — Sterile 

 plains, W. Arkansas to Texas. (Adjacent Mex.) 



22. AMPHlACHYRIS, Nutt. {Brachjris § Amphiadnjris, DC.) — 

 ( 'Afjicjji, about, or on both sides, and a.-)(ypov, chaff.) — As here constituted, the 

 genus consists of two rather low and fastigiately or diffusely much-branched and 

 erect glabrous plants, with entire leaves ; the first with the habit of Gutierrezia, 

 the second sufficiently different to form a subgenus (AniPHlPArpus, Torr. & 

 Gray) : fl. yellow in late summer and autumn. 



A. dracunculoides, NriT. Annual, rather low, effusely corymbiform, the slender 

 branches and branchlets terminating in single pedunculate heads : leaves narrowly linear or 

 the uppermost filiform: involucre hemispherical or short-campanulate ; the bracts 10 or 12, 

 firm-coriaceous and whitish with abrupt green tips, mostly ovate or oval: rays 5 to 10, oval 

 or oblong, nearly as long as the involucre-; disk-flowers 10 to 20, wholly sterile, the ovary 

 quite abortive ; their pappus of 5 to 8 scarious almost aristiform smooth palere, cupulately 

 united at base and slightly dilated upward : akenes (of the ray) with a minute or obscure 

 coroniform pappus. — Trans. Am. Phil. See. vii. 313 ; Torr. & Gray, Fl. ii. 192. Bradtyris 

 dracuncidotdes, DC. PI. Ear. Genev. vii. 1, t. 1, & Prodr. v. 313. Brachi/ris ramosustma, 

 Hook. Ic. t. 142 ; DC. Prodr. vii. 278. Gutierrezia Lindheimeriana, Scheele in Linn. xxii. 

 351. — Plains, Kansas to Texas. 



A. Premontii, Gr-at. Shrubby, a foot or two high, with rigid tortuous branches : leaves 

 short (half or quarter-inch long), obovate or spatulate, commonly narrowed at base into a 

 margined petiole : heads mostly sessile and glomerate in small coryrabosely disposed cymes : 

 involucre campanulate or oblong, 2 lines long; the bracts 7 to 9, thin, mostly destitute of 

 green tips : rays 1 or 2, short : disk-flowers 3 to 6, with infertile glabrous ovary, and' a 

 pappus of about 20 flattish denticulate-hispid tortuous bristles, some of them lirancliing 

 or irregularly paleaceous-concreted at base : ray-akenes with a pappus of fewer and short 

 bristles or squamella;, more united at base. — Proc. Am. Acad. viii. 633, & Bot. Calif, i. 

 302. Amphipappus Fremontii, Torr. & Gray in Jour. Bost. Sot-. Nat. Hist. v. 4 ; Torr. 

 PI. From. 17, t. 9. — Arid deserts on the Mohave, S. E. California, Fremont, to S. W. Utah, 

 Pcdmer. 



23. G-RIND:fiLIA, Willd. (Prof, inenvn/mus Grindel, of Riga and 

 Dorpat.) — Herbs, or some species shrubliy, of roar.sc habit (American, ''mostly 

 of the U. S. west of the Mis.sissippi) ; Avith sessile or partly claspino- and usually 

 serrate rigid leavl^s, and rather large heads of yellow flowers terminating the 

 branches ; the narrow rays nsu.iUy numerous, ocrusionally wantino- ; central disk- 

 flowers not rarely infertile. Ilevliage often balsamic-viscid, the heads especially 

 so before and during anthesis (whence called Gum-plant in California) : fl. all 



