10 22 CICHORIACEAE 



beak the base of which is surrounded by a cup-shaped border. Pappus of capil- 

 lary white bristles, in several series, the outer falling off separate. 

 Corollas white, turning pink; leaves with broad white scarious margins ano^short^broad 

 Corollas yeUow^tuming pink; leaves with very narrow white scarious margms^nd^subu: 



1 G marginata D. C. Eat. Stems many, 1-5 cm. long; leaves numerous, 

 with' winged petioles, runcinate-pinnatifid; lobes rounded, scarious-margined, 

 with triangular obtusish teeth; leaves subtending the heads pectmate-setif erous ; 

 involucres 10-12 mm. high; bracts lance-linear; ligules 2-3 mm. long; achenes 4 

 mm. long; beak 1 mm. Desert regions: Nev. s Utah Ariz. Calif. Ore. L. 

 Son. My-Je. 



2. G. setulosa A. Gray. Stems 1-5 cm. long; leaves petioled, oblanceolate 

 or obovate in outline, runcinate-pinnatifid; lobes rounded, with lance-linear or 

 subulate, setiform teeth; ligules 1-2 cm. long; achenes similar to those of the 

 preceding. Desert regions: s Utah Ariz. s Calif. L. Son. My. 



14. MALACOLEPIS (A. Gray) Heller. SNAKE'S HEAD. 



Leafy-stemmed annuals, with broad leaves. Involucre broadly campanu- 

 late; bracts imbricate in several series, silvery-scarious, with green midribs, the 

 outer short and orbicular. Receptacle bearing slender persistent bristles. Cor- 

 ollas white, becoming purple-tinged in fading. Achenes 4- or 5-angled, 12-15- 

 ribbed, columnar, truncate and denticulate at the apex. Pappus of numerous 

 white capillary bristles, united at the base and falling off together, and one or two 

 stouter outer ones, more persistent. 



1. M. Coulter! (A. Gray) Heller. Stem glabrous, 2-4 dm. high; lower 

 leaves short-petioled, the upper sessile and clasping, all sinuate-dentate to pinnat- 

 ifid, with broad triangular lobes or teeth; heads paniculate; involucres 12-15 

 mm. high. Malacothrix Coulteri A. Gray. Hillsides: s Calif. s Utah Ariz. 

 L. Son. Mr-My. 



15. MALACOTHRIX DC. DESERT DANDELION. 



Annual or perennial herbs, commonly with a basal cluster of leaves. Invo- 

 lucre campanulate or turbinate; bracts narrow, acute or acuminate, imbricate. 

 Receptacle naked or with a few deciduous bristles. Flowers yellow, white, or 

 pinkish. Achenes short, truncate at the apex, with a denticulate border, 10-15- 

 ribbed. Pappus of numerous, capillary, white-scabrous bristles, more or less 

 united at the base and falling off together or with 1-8 stronger outer ones more 

 persistent. 



Divisions of the leaves filiform; plant scapose or nearly so. 1. M. glabrata. 



Divisions or lobes of the leaves not filiform; stem more or less leafy. 



Leaves sinuately runcinate; lobes entire or nearly so; achenes not winged. 



2. M. runcinata. 

 Leaves deeply pinnatifid; divisions toothed or lobed. 



Achenes wing-margined on 5 of the ribs; outer persistent bristles of the pappus 



present. 3. M. Torreyi. 



Achenes not winged ; outer persistent bristles of the pappus none. 



4. M. sonchioides. 



1. M. glabrata (D. C. Eat.) A. Gray. Annual, branched at the base, sub- 

 acaulescent; leaves mostly basal, pinnatifid, with narrowly linear divisions, gla- 

 brous; branches scapiform, bearing 1-3 heads; involucres about 1 cm. high; 

 bracts lance-linear, slightly tomentulose when young; flowers yellow; outer pappus 

 of 2 persistent bristles; achenes narrow, slightlv costate-striate. Dry regions: 

 s Utah Ariz. e Calif. Ida. Son. Ap-My. 



2. M. runcinata A. Nels. Annual; stem branched at the base, 5-15 cm. 

 long, with decumbent branches, glabrous or nearly so; leaves 2-4 cm. long, ob- 

 lanceolate to linear in outline, dentate to runcinate-pinnatifid, with mostly entire 

 lobes; involucres 10-12 mm. high, broadly campanulate; bracts linear-lanceolate, 

 m about 3 series, scarious-margined; achenes linear-columnar, about 3 mm. long, 



