116 COMPOSITE. 



G. eriocarpa, Gray. Low or taller (a foot or two high) : receptacle obtusely high-conical : 



pappus of 12 or more linear-lanceolate or subulate and mostly distinct palese, about half the 



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



Havard. (Mex.) 



G. Beklandieki, 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, Tokk. & Gkay. 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 : rays 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 palese, of length less than the breadth of the akene. — PI. ii. 194. Hemiachyris 

 Texana, DC. Prodr. f. 314. Brachyris microcephala, Hook. Ic. t. 147, not DC. — Sterile 

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



22. AMPHlACHYEJS, Nutt. (Brachyris § Amphiachyris, DC.) — 

 ('A/j.(j)C, about, or on both sides, and axypov, 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 (Amphipappus, Torr. & 

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



A. dracunculoid.es, Nutt. 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 paleae, cupulately 

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

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

 dracunculoides, DC. PI. Par. Genev. vii. 1, t. 1, & Prodr. v. 313. Brachyris ramosissima, 

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

 351. — Plains, Kansas to Texas. 



A. Fremontii, Gkay. 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 corymbosely 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 » 

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

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

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

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

 PL Prem. 17, t. 9. — Arid deserts on the Mohave, S. E. California, Fremont, to S. "W. Utah, 

 Palmer. 



23. G-RIND^LIA, Willd. (Prof. Hieronymus Grindel, of Riga and 

 Dorpat.) — Herbs, or some species shrubby, of coarse habit (American, mostly 

 of the U. S. west of the Mississippi) ; with sessile or partly clasping and usually 

 serrate rigid leaves, and rather large heads of yellow flowers terminating the 

 branches ; the narrow rays usually numerous, occasionally wanting ; central disk- 

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

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



