260 COMPOSITAE 
reduced, ovate-lanceolate to linear-oblong, broadly clasping ; heads 3-5 cm. across, —- 
aed and translucently resinous, the long green tips of the phyllaries rolled back in a loop; r 
= 8-15 mm. long. 
Dry eee and banks, also borders of salt marshes and shores, Upper Sonoran Zone; not far inland, Santa 
Barbara County, California, to northern Lower California. Tyee ‘locality: San Pedro. Mar ch—Sept. 
Sia cuit var. bractedsa (J. T. Howell) Keck, Aliso 4: 102. 1958. le nae Bids te a Daal 
eo ogg Beste 2: 22. 1931; G. “Shieleaalis var. bracteosa Steyermark, Ann. Mo. Peas rd. : 227. 1934.) 
Hea scoid. Dry hills and eee Ana Up . se Zone; away from the snc Shere ag tt; tone tae perni4 
Hil, Los Angeles cued: to e Hills, n Diego County, California. Type ontitr! Santa Ana Cany 
May-Jul 
69. GUTIERREZIA* Lag. Gen. & Sp. Pl. 30. 1816. 
Perennial herb or subshrub, glutinous, glabrous to hirtellous. Leaves alternate, entire, 
filiform to narrowly oblanceolate, usually punctate-glandular. Heads very small, radiate, 
yellow, numerous, scattered or crowded in cymes or panicles. Involucre cylindric to turbi- 
nate-subglobose, the imbricated phyllaries coriaceous, appressed, whitish. Receptacle fo- 
veate, sometimes hairy ay-florets pistillat fertile. Disk-florets perfect, sometimes 
sterile. Achenes obovoid or aS ong, paeeeent: pappus of 10-12 oblong, unequal, free 
scales, shorter on the ray-achen | Named for the Spanish nobleman, Pedro Gutierrez. ] 
foli es genus of about 25 species, ese = western North and South America. Type species, Gutierrezia lineari- 
olia Lag. 
Heads flaring, more than 4‘ flowered. 
, 3-5 mm. thick; ray-florets 5-10; disk-florets 6-16; cismontane. 
1. G. californica. 
Involucre narrowly turbinate, 2—3 mm. thick; ray- and disk-florets each 3-6; transmontane. an 
- sa 
Heads cylindric, about 1 mm. thick, 2—4-flowered. . G. seerniia 
1. Gutierrezia californica cases Torr. & Gray. San Joaquin Matchweed. 
Fig. 5429. 
Brachyris californica DC. Prod. 5: 313. 1836. 
Gutierrezia californica Torr. & Gray, Fl. N. Amer. 2: 193. 1842. 
= manoeeeyean oe ee um Greene, Man. Ba Pye ihe tenes 
Abrams, Bull. pad cist 34: 
Gutierrezia californica var. bracts ata H. M. Hall, sa: ee a Bot. 3: 36. 1907. 
Subshrub 3-6 dm. high, nearly as to densely poms the branches stiff es ay or 
metimes sping and spreading, very twiggy above. Lea preading to deflexed, up to 5 cm. 
long, ostly 1 mm. wide; heads usually solitary at ends of hratich bas. arel¥ crow es oe 
oie ag curb ae -O oveid or campanulate, 5-7 mm. high, 3-5 mm thick, the usually broad blunt 
sdvyltisics with definite green tips; ray- -florets 5-10; disk-florets 6— 
Dry hills and plains, Sonoran Zones; Marin County, California, the Sana South foam Range from San 
Fra Bove a Bay to sone San ar, pe: and Seemontane pat oi California east to Arizona and Chinaahds. 
Type locality: California. May tergrading with G. sarothrae in southern California. 
2. Gutierrezia saréthrae — Britt. & Rusby. Common Matchweed or 
keweed. Fig. 5430. 
semeas estar Pursh, Fl. —_— Ce 2: 540. 1814. 
63. 1818. 
Gutierrezia e eT ; Fi, . 1842. 
Gutierrezia sarothrae Britt. & Rusby, Trans. N.Y. Acad. 7: 10. 1887. 
sy eereete PETERS. Gree Pittonia 4:56. 1899, in large part. 
ricina » Rep. Nov. Sp. 7: 195. 1909. 
Gutierrezia ionensis Lunell, Amer Midi. Mat. 2: ng 1912. 
Xanthocephalum — Shinners, Field & Lab. 18: 29. 1950. 
above. Leaves ‘punctate, a5. ce on 1m. ide; in ii escence flat-topped, the numerous 
resinous heads scattered or usually mall glomerules ; involucre narrowly turbinate, 45 mm 
high, 2-3 mm. thick, the a bi faith lea peat thic eed herbaceous tips; ray- and disk- 
florets 3-8 each, the ligule about 3 mm. long; achenes subsericeous- bevery pappus of ray about 
0.7 mm. long. of disk about 1.5 m m. long. 
plains and mountainsides, a Zones; southeastern Washington and eastern Oregon south along 
the Califo Mojave Desert ‘and San Diego County; more abundant eastward to the Great 
Plains, from Saskatchewan to northern Mexico. Type locality: plains of the Missouri River. —Oct. 
3. Gutierrezia microcéphala (DC.) A. Gray. Small-headed Matchweed. 
Fig. 5431. 
elie dara DC. Prod. 5: 313. 1836. Not Hook. 1837. 
Gutterr. microcephala A. Gray, Mem. Amer. Acad. II. 4: 74. 1849. 
pasttctaed euthamiae var. eatiroetihel A Gray, Syn. Fl. N. Amer. 12: 115. 1884. 
* Text contributed by David Daniels Keck. 
