262 COMPOSITAE 
of branchlets. Involucre obovoid, — 3-seriate, strongly graduate, pale, the 7-12 broad 
rounded phyllaries thin, with scarious erose margins. Receptacle fimbrillate. Ray-florets 
1-2, pale yellow, small, pistillate, fertile. Disk-florets 4-7, perfect, sterile. Anthers nar- 
) 5 
tortuous, hispidulous, irregularly basally united, white paleae of unequal width, ae 
the corolla. [Name Greek; amphi, both (kinds of), RE 5 pappos, pappus. | 
A monotypic genus. 
1. Amphipappus fremontii Torr. & Gray. Chaff-bush. Fig. 5432. 
Amphipappus fremontii Torr. & Gray, Bost. Journ. Nat. Hist. 5: 108. 1845. 
Amphiachyris fremontit A. Gray, Proc. Amer. Acad. 8: 633. 1873. 
Much-branched, white-barked shrub 3-6 dm. high with yellow- -green cast, glabrous throughout, 
slightly ee te around heads. Leaves 5-12 mm. long, 2-4 mm. wide, obtuse or acute, l-nerved; 
hea , the phyllaries closely app pressed. 
pen igh ss ve an a atiitine flats, Lower Sonoran Zone; Death Valley region, California, from Inyo and Argus 
Ranges to Funeral Mountains and Renestep Valley, Inyo and San Bernardino Counties; east to Nevada. Type 
locality: m the M ohave abies a Apri 1—-May 
Am bhis ipappus fremonti bsp. spindsus tA. s.) Keck, Aliso 4: 102. 1958. aig, “eae: ga fremontit 
var. spinosa A. Nels. Bot. Gas. ‘47: ert 1909; , Amphipappus spinosa A. Nels. Pine Journ. Bot. 21: 579, 1934; 
tit var. spinosus C. L. T, op. 30: 483. 3.) Herbage densely scabrohispidulous. Similar 
. fremon 
sites, eastern Mojave Desert, California, and farthee south in ee Bernardino County; east to Utah and Arizona. 
Type locality: Moapa, Neva ada. 
71. ACAMPTOPAPPUS* A. Gray, Proc. Amer. Acad. 8: 634. 1873. 
Low, much-branched, desert shrubs with white bark. Leaves alternate, small, usually 
spatulate or oblanceolate, entire, l-nerved. Heads yellow, radiate or discoid, subglobose, 
— Achenes subturbinate, short, densely villous. Pappus persistent, of about 
very flattened paleae and bristles of different whee the broader ones usually somewhat 
dist ae [ Name Greek, meaning stiff pappu 
s of 2 known species. Type species, Aplopappus Te licwislis Harv. & Gray. 
Heads discoid, small, gathered in small cymes. ae ea 
Heads radiate, large, solitary at tips of branches. ACS 
1. Acamptopappus sphaerocéphalus (Harv. & Gray) A. Gray. Goldenhead. 
Fig. 5433 
Aplopappus sphaerocephalus Harv. & Gray in A. Gray, Mem. seg aero Il. 4: 76. 1849. 
Acamptopappus sphaerocephalus A. Gray, Proc. Amer. Acad. 8: 
Round-topped shrub 2-9 dm. high, corymbosely MEE often iat twiggy, glabrous 
fa gsi or rages hispidulous o nm leaf-margins. Leaves linear et — ate, 5-20 mm. long, 
m. wide, obtuse to acute, eucronulate firm, sessile, gray-gre spears " subglobos e, 7- 10 
mum. hig beste mostly liats but approximate at tips ‘of cymosely caaianl branchlets ; involucre 
-6 oe igh. 
Open Lower Sonoran Zone; eastern Mojave Desert and western border of Colorado Desert, Inyo 
Kot ee. to oe "nae *Comuty, California, east to Nevada, Utah, and Arizona. Type locality: ‘‘California.” 
pri 
Aca ampt opappus sphaerocephalus var. hirtéllus Blake, Journ. Wash. Acad. 19: 270. 1929. Stems ms 
leaves peneely herteflows. Western borders . eer Dessert to Lone Pine, Inyo County, California; wester 
Nevada. Type locality: Lone Pine. May-Jun 
2. Acamptopappus shéckleyi A. Gray. Shockley Goldenhead. Fig. 5434. 
Acamptopappus shockleyi A. Gray, Proc. Amer. Acad. 17: 208. 1882. 
Rounded shrub 1.5—5 dm. high, poor ge pean the spoken: 6 finely hirtellous or hispidulous. 
—_ ge pm oblanceolate, oa . SHlipt 15 mm. long, u mucronulate; heads glo pati 
wide, solitary a adr or nearly naked Pebiaces: ; favolacre 8-11 mm. Eich; ra 
8-13, the oblong. lieu le about 1 bso toes 
Desert and washes, Lower Sonoran Zone; White Mountains, Inyo County, to Clark Mountain, 
San Bernardino County, California; “Southern Nevada. Type locality: near Candelaria, Nevada. April-June. 
* Text contributed by David Daniels Keck. 
