234 COMPOSITAE 
56. SYNTRICHOPAPPUS A. Gray in Torr. Pacif. R. Rep. 4: 106. 1857. 
Low, usually diffuse annuals. Leaves alternate, sometimes opposite below, entire 
3-lobed at apex, narrowed to a petioliform base. Heads many, terminating the beutichtees, 
short-peduncled. Phyllaries of the involucre few, partly enclosing the ray-achenes, in 1 
i J e 
series, erect or a di n anthesis, spreading after achenes ed. R acle flat, 
naked. Ray-flowers pistillate, fertile, as many as the phyllaries, the ligules yellow or white 
and pinkish-tinged, oval and toothed at apex. Disk-flowers perfect, fertile, yellow, tube 
much shorter than the trumpet-shaped throat sat nly lobes. ue ers obtuse - Bios, ap- 
pendaged at apex. Style-branches flattened, Achenes narrowly obpyramidal or 
aie, 5-angled. Pappus none or the paleae aisected into many bar sol cicorhas united 
at base into a ring. [From the Greek meaning united, hair, and pa 
A genus of 2 species, natives of the deserts in California, sition Utah, Nevada, a far erie Arizona, Type 
species, ay whivickotabene fremontit A. Gray. 
Ligules of the ray-flowers yellow; pappus of numerous bristles united at the base. Ae 
Ligules of the ray-flowers white or pinkish; epappo as 
1. Syntrichopappus freméntii A. Gray. Yellow Syntrichopappus or Fremont’s 
Xerasid. Fig. 5383. 
Syntrichopappus fremontii A. Gray in Torr. Pacif. R. Rep. 4: 106. pl. 15. 1857. 
Loosely pian ann uals 3-10 cm. high, diffusely much branched from the base, except in 
depauperate specimens, the Boner ions ascending. Leaves 5-20 mm. long, linear- spatulate to 
spat tiifate. 3- tpgibe ris apex or less often entire, narrowed to 2 Pega estes base; heads many, 
terminating t bean chlets, ~ peduncles ae involucre . high, narrowly campanulate 
to nearly cae ric; phyllar s 5, oblong, and thin at buns hand the mid- 
saltoe strongly concave seid cahanee ers 5, ‘ee: thesis — fe a mm. long, 5-7- — 
disk-corollas 20 or more, "golden yellow, about 2. es 3 mm. lo toes angled, ob- 
pyramidal, hirsute we asc cending hairs, the paieae or femcnd: are 35-40 white barbellate 
bristles united at the base and uous ina r 
Sandy desert plains ot slopes, a Zones; bea Valley region, Inyo County, south i e Mojave we eer 
to Los Angeles, pees an nd San Bernardino Counties, California, east to southern Nevada, Utah, ‘ northwestern 
Arizona. Type ocality : “somewhere between the Roc ky Mountains and the Sierra Nevada.” Collected i ere 
mont. April’ May 
2. Syntrichopappus lemmonii A. Gray. Pink-rayed Syntrichopappus or 
Lemmon’s Xerasid. Fig. 5384. 
Actinolepis lemmonii A. Gray, Proc. Amer. Acad. ste 101. 1880. 
popelgeane te lemmonit A. Cree op. cit. 19: 20. 1883. 
‘a lemmonii Cockerell, Muhlenbergia 3: 9. 1907. 
an floccose to glabrate annuals 2-8 cm. a with reddish gaa et iy mostly branch- 
ing above the base with asce ending | - ct branches. Leaves ong, linear or linear- 
spatulate, obtuse ; heads se everal = wai peduncles 8-10 mm. ey jnvolucre 4-5 mm. high, 
narrowly campanulate; phyllar so G oblong, scarious-margined, the midsection con- 
cave, the ap acute and thin Tanully spre ading i #4 age; neues of ray-flower s 6-8, white or pinkish 
above with darker veins conspicuous g, 3-veined ; disk- flowers pale yellow; 
achenes se pias ut 2 mm. long, attiet thinly atrighae on nearly glabrous, oa 
Sandy slopes, 1 mostly lower eek of Upper Sonoran Zone; western edge of the ee. sert in ‘Saini Los 
Angeles, and San B "Califo rnia. Type locality: Mojave Desert. April-May 
57. RIGIOPAPPUS A. Gray, Proc. Amer. Acad. 6: 548. 1865. 
Slender, more or less hirsutulous annuals, simple or branched above, _ lateral branches 
usually surpassing the ma in axis. Leaves aiding. linea e lowe ually deciduous. 
eads many-flower oT inati ranch 
laries narrowly lanceolate, firm, subequal, in 2 series, iia narrowly hyaline- -margine ad. 
partially clasping the outer achenes. Receptacle flat. ay-flowers pistillate, the ligules 
hort. Disk-flowers perfect, the tube shorter than the Ania fe throat, the teeth very gant 
Anthers obtuse at base, subentire. Style-branches short, with subulate hairy tips. Achen 
linear, abruptly narrowed and truncate at apex, somewhat compressed, finely roa ei 
rugose and strigose with broad-tipped hairs. Pappus of 3-5 firm, strigulose, awn-like 
eens [From the Greek meaning 2 a alg and pappus. } 
A monotypic genus of western United Stat 
1. Rigiopappus elena A. mea Rigiopappus. Fig. 5385. 
Rigropappus leptocladus A. Gray, Proc. Am cad. 6: 548. 18 
heed leptoctadses as lonoiaristatus 8. hen Syn. se N. oe 12: 339. 1884. 
giopapp N. Amer. Fl. 34: 64. 
Gray-green annual 1-3 dm. high. Leaves ire linear, mostly erect, 1-3 cm. long; h 
jacranatio ng the branches; involucres 4-7 mm. high; phyllaries hirsutulous ; ; ray-flowers aS 
