GuTiKRRKziA. COMPOSlTiE. 193 



37. GUTIERREZIA. Lagasca, nov. gen. S^- spec. (1816) p. 30; Don, 

 and Hook. S^- Arn. in coirqmn. to hot. mag. 2. p. 51. 



Brachyris, Nutt. (1818)— Brachyris § 1. (excl. no. 6.) & Hemiachyris, DC. 



Heads 8-40-flowered; the ray-flowers ligulate, pistillate, fertile, in a single 

 series ; those of the disk tubular, perfect and fertile. Involucre carapanulate 

 or turbinate ; the scales appressed and closely imbricated, rigid, with some- 

 what foliaceous greenish tips. Receptacle naked. • Corolla of the ray oblong 

 or oval, with a short tube ; of the disk infundibuliform, 5-toothed ; the teeth 

 short, recurved. Branches of the style in the disk-flowers linear, elongated, 

 obtuse, hairy down to the very short stigmatic lines at the base ; in the ray 

 glabrous, the stigmatic lines extending to the summit. Achenia somewhat 

 obconic and terete, pubescent or silky. Pappus of several linear or oblong 

 chaffy scales, mostly in a doable series, persistent ; that of the ray sometimes 

 obsolete or wanting. — Perennial or snflruticose plants (natives of the region 

 beyond the Mississippi,'and of Mexico and South America to the extremity of 

 the continent), glabrous, somewhat glutinous and balsamic, with linear or 

 lanceolate entire mostly irapressed-punctate alternate leaves. Heads solitary, 

 or aggregated (about 3 together) at the summit of the corymbose or paniculate 

 branchlets. Flowers yellow. 



§ 1. Pappus as long as the achenium, more or less distinctly in a double se- 

 ries ; that of the ray similar to the disk, or often shorter. — Gutierrezia, 

 Lag. (Brachyris, Nutt.) 



1. G. Californica : stem terete, somewflat paniculate at the summit; 

 leaves linear, acute, attenuate at the base, scabrous, slightly ciliate, strongly 

 1-nerved ; heads few, sometimes glomerate, turbinate or obovate; flowers of 

 the disk and ray each 8-10 ; pappus of mostly 9 narrowly linear rather acute 

 chaffy scales, in the disk longer than the achenium. — Brachyris Californica, 

 DC! prodr. 5. p. 313; Hook. 6^' Am. ! bot. Beechey, suppl. p. 351. 



California, Douglas ! — Stem a foot high. Limb of the ligulate corolla 

 broadly oval. Achenia silky. Pappus manifestly in a double series ; that 

 of the ray shorter. — Hooker & Arnott consider this species not only identical 

 with the following, but also probably the same as G. linearifolia. Lag. In 

 G. Euthamise, however, the scales of the pappus are shorter and broader, 

 the achenia less hairy, &c. ; yet all these species are too closely allied. 



2. G. Euthamiee: stems woody and much branched at the base, angled ; 

 leaves crowded, narrowly linear, acute, attenuate at the base, 1-nerved, 

 slightly scabrous ; corymb compound, fastigiate, contracted ; the heads 

 mostly glomerate, turbinate-cylindrical ; flowers of the ray and disk each 

 about 5 ; pappus mostly of 9 oblong-linear obtuse chaffy scales, about the 

 length of the achenium. — Brachyris Euthamise, Nutt. ! gen. 2. p. 163 ; Hook. ! 

 jl. Bor.-Am. 2. p. 23 ; DC. I. c. Brachyachyris Euthamise, Spreng. syst, 



3. p. bl^. Solidago Sarothree, Pursh, Jl. 2. p. 540. 



Arid hills of the'Upper Missouri, &c., Lewis, Nuttall! to the Saskatcha- 

 wan, Drummond! Douglas! — Srems numerous, 6-12 inches high. Ligulate 

 flowers spreading; the limb broadly oval. Pappus in a double series; that 

 of the ray mostly a little shorter, but otherwise similar. 

 VOL. II. — 25 



