SUNFLOWER FAMILY 261 
WIZ Wi. 
Sit Se i 
Pie ‘ly Ohare 
CA She 3 Y doo ae BES 
5428. Grindelia robusta 5430. Gutierrezia sarothrae 
5429. Gutierrezia californica 5431. Gutierrezia microcep. 
Xanthocephalum — Greene, ve e 282. 1892. 
Gutierrezia lucida Greene, Fl. Fran 
Gutierrezia glomerella biwe ene, tig €: cs 
u 
Gutierrezia sarothrae var. microcephala L. Benson, keer: Journ. ~~ 30: 631. 1943. 
Xanthocephalum microcephalum tae Field & Lab. 18: 29 
Many-stemmed, 3-6 dm. high, seb resinous, cnt glabrous, si slender stems striate- 
angled, much-branched above. Leaves 2-5 cm. long, 0. e 2m wae frvaee 2 — ed; in — 
rescence cymose-paniculate, the see heads about 3 mm. hi si wide: eect" terminal 
glomerules of 2-5 or a few solitary ; phyllaries yellowish white eith yellow t tips, the teealitie rei 
prominent, the inner row of only 2 a as long as the disk-florets ; ray- and disk-florets 1-2 
each, the ligule up to 2.5 mm. lon ay-achenes fertile, appressed- ios, their pappus of about 
8 oblong paleae 0.8 mm. Pa Sh okcoee of about 12 paleae 1 mm. lon 
desert, Sonoran Zones; Mojave Desert from White ee a0 oe nty, to Palmdale and Little 
+ pepe pic i ocpietccigess . California; east to Colorado, Texas, and northern Mexico. Type locality: Saltillo, 
ug 
70. AMPHIPAPPUS* Torr. & Gray, Bost. Journ. Nat. Hist. 5: 107. 1845. 
Low shrub with divaricate spinescent branchlets. Leaves alternate, small, entire, oval 
to elliptic or obovate, short-petioled. Heads radiate, few-flowered, small, glomerate at tips 
* Text contributed by David Daniels Keck. 
