Gutierrezia. COMPOSITE. 115 



21. GUTIERRfiZIA, Lag. (Named for some member of the noble 

 Spanish, family, Gutierrez.) — Herbs or suffrutescent plants (N. & S. American), 

 glabrous, often glutinous ; with narrowly linear and entire alternate leaves, and 

 small heads of yellow flowers, either solitary terminating the branchlets, or in 

 dense cymes in the manner of Gymnosperma, from which it is distinguished 

 mainly by the pappus. — Nov. Gen. & Spec. 30 ; Hook. & Am. Comp. Bot. Mag. 

 ii. 51 ; Torr. & Gray, Fl. ii. 193. Brachyris, Nutt. Gen. ii. 103. Brachyachyris, 

 Spreng. Syst. iii. 574. Brachyris (excl. spec, and § 2), Hemiachyris, & Odonto- 

 carpha, DC. Prodr. v. 312, 71. 



G. i,inearif6lia, Lag., the original species (of which no specimen named by Lagasca is 

 extant), on account of the oblong involucre with bracts loose at apex, enclosing only about 8 or 

 10 flowers, may with the highest probability be referred to a Chilian species, the Brachyris 

 paniculata, DC. Prodr. v. 313; and this, although not traceable at Madrid, was collected by 

 Nee, and has been communicated to herb. DC. and herb. Boissier, to the latter by Pavon. 



§ 1 . Pappus of ray and disk similar, or in the former shorter : ligules mostly 

 short : involucral bracts in N. American species all appressed. — Brachyris, Nutt. 



# Suffruticose, and the woody base much branched: heads fastigiately or paniculately cymose: 

 receptacle plane or small: pales of the pappus conspicuous, from narrowly oblong to linear- 

 subulate. 



G. Buthamise, Torr. & Gray. Bushy, from glabrous to hirtellous-puberulent, 6 to 18 

 inches high, with mostly strict and fastigiately polycephalous branches : leaves narrowly 

 linear, verging to filiform : heads mostly clavate-oblong, few-several-flowered, not over 2 

 lines long, some short-pedunculate, others 3 to 5 in a glomerule (in the manner of Solidago 

 § Eulhamia) : flowers of disk and ray not numerous (commonly 3 or 4 each, or the latter 



5 or 6, sometimes only one or two each) : akenes sericeous-pubescent. — Solidago Sarothroz, 

 Pursh, Fl. ii. 540. Brachyris Euthamice, Nutt. Gen. ii. 163; Hook. Fl. ii. 23. B. Euthamice 



6 B. divaricata, Nutt.. Trans. Am. Phil. Soc. vii. 313, the latter an open form. Brachyachyris 

 Euthamice, Spreng. Syst. iii. 574. Gutierrezia Euthamice & G. divaricata, Torr. & Gray, Fl. 

 ii. 193. — Arid plains and rocky hills, Saskatchewan to Montana, south to New Mexico, 

 Arizona, and borders of California. (Adj. Mex., where there is also a form with rather 

 broadly linear leaves, coll. Berlandier, Thurber.) 



Var. microcephala. Heads smaller, narrower, few-flowered, commonly oblong- 

 cylindraceous and the involucre of fewer and narrower bracts : flowers of disk and ray mostly 

 reduced to one or two each : leaves either narrowly linear or nearly filiform : pappus, as in 

 the species, varying from short-oblong and obtuse (as in Berlandier's Saltillo specimens) to 

 linear-lanceolate, and even attenuate-acute (as in Parry & Palmer's) : certainly passes into 

 G. Euthamice. — G. microcephala, Gray, PL Fendl. 74, PI. Wright., &c. G. microphylla, 

 Dnrand & Hilgard, PI. Heerm. 40. Brachyris microcephala, DC. Prodr. v. 313. — S. Texas 

 and New Mexico to S. California. (Adj. Mex., first coll. by Berlandier.) 

 G. Calif ornica, Tore. & Gray, 1. c. More loosely branched : heads seldom glomerate- 

 fascicled, obovate-turbinate, 2 or 3 lines long : involucral bracts (except small outermost) 

 broad, oblong to obovate : rays 8 to 10, short : disk-flowers 6 to 12 : akenes more villous. — 

 Brachyris Californica, DC. 1. c. Gutierrezia linearifolia (with some of G. Euthamice), Gray, 

 Bot. Calif, i. 302, not Lag. — Hills, California near the coast, from San Francisco Bay south- 

 ward (first coll. by Douglas) : also San Bernardino Mountains (Parish), and Mesas of Ari- 

 zona, Palmer, Lemmon, Pringle. 



* # Annual herbs, loosely much branched : heads singly terminating the branchlets and panicu- 

 late: involucre hemispherical or obscurely obovate, about 2 lines in diameter, many-flowered: 

 rays 9 to 15; disk-flowers 20 to 30: receptacle more or less elevated and hirsute-fimbrillate : 

 akenes very short, obovate or turbinate, 10-costate; the ribs very silky-villous. 



G. spheerocephala, Gray. Low: receptacle of the flowers obtusely conical or hemi- 

 spherical : pappus of 5 or 6 ovate short coroniform-concreted paleas, barely half the length 

 of the akene.— PI. Fendl. 73, PI. Wright, ii. 79. — S. W. Arkansas, E. New Mexico, and 

 S. W. Texas, Fendler, Wright, &c. 



