Gutierrezia. COMPOSITE. 115 



21. G-UTIEIlR:fiZIA, Lag. (Named for some member of the noble 

 Spanish family, Gutierrez.) — Herbs or suifrutescent 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 Gt/mtiogperma, from which it is distinguished 

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

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

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

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



G. LiNEAEiFOLiA, 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 sj)ecies, the Braclt)jris 

 pan icu/ata, DC. Prodr. v. 313; and this, altliough not traceable at Madrid, was collected by 

 Nee, and has been communicated to herb. DC. and htrb. 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 fastigiateh' or paniculately cymose: 

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

 subulate. 



G. Euthamise, Tork. & Gray. Bushy, from glabrous to hirtellous-puberulent, 6 to 18 

 inches high, with mostly strict and fastigiately polycephalous bi'anches : leaves narrowly 

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

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

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



5 or 6, sometimes only one or two each) : akeues sericeous-pubescent. — Solidai/o Sdwlhrce, 

 Pursh, Fl. ii. 540. Brachi/ris Euthamia, Nutt. Gen. ii. 163; Hook. Fl. ii. 23. B. Euthamm 



6 B. du:aricata, Nutt. Trans. Am. Phil. Soc. vii. 313, the latter an open form. Brachi/achyiis 

 Euthamice, Spreng. Syst. iii. 574. Gntierrezia Eiithamue & G. divaricafa, Torr. & Gray, Fl. 

 ii. 193. — Arid plains and rockj^ 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, Thitrher.) 



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

 cyliudraceous 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 Berlaudier's Saltillo specimens) to 

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

 G. Eiifhamup. — G. mirrocepliakt, Gray, PI. Fendl. 74, PI. Wright., &c. G. mlcrophijlla, 

 Durand & 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. Californica, Torr. & 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 Cidifornica, DC. 1. c. Gutierrezia. linearifolia (with some of G. Eutliamia'), 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, Prinrjle. 



* * 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-timbrillate : 

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



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

 spherical : pappus of 5 or 6 ovate short coroniform-concreted palew, 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. 



