CHICORY FAMILY 1021 



3. N. nigrescens (Henders.) Heller. Perennial, with a taproot and short 

 caudex; leaves linear-oblanceolate, 3-24 cm. long, 3-10 mm. wide, pale green, 

 acute or acuminate, mucronate; scape 1-2 dm. high, slightly villous below the 

 head; involucres campanulate ; bracts in 3 series, abruptly acuminate, the outer 

 ovate, the inner lanceolate, conspicuously scarious-margined and black-dotted; 

 flowers purple on the outside; achenes blackish; pappus of very narrow scales 

 gradually attenuate upwards into long bristles. Micoseris nigrescens Henders. 

 Wet meadows: Mont. — n Wyo. — Ida. Plain — Submont. Je. 



11. CALYCOSERIS A. Gray. 



Much branched winter annuals, glabrous below, glandular in the inflorescence. 

 Involucre campanulate; bracts many, scarious-margined, equal, with 1-2 outer 

 series of small calyculate ones. Receptacle with capillary bristles. Flowers 

 yellow or rose-colored. Achenes 5-ribbed, narrowed above into a short beak, 

 ending in a denticulate cro^vTi. Pappus of niunerous capillary white bristles 

 united at the base and falling away in a ring. 



Flowers rose-colored; achenes with the short beak about .5 mm. long. 1. C. Wrightii. 



Flowers jellow; achenes with the long beak about 10 mm. long. 2. C. Parryi. 



1. C. Wrightii A. Gray. Stem 2-4 dm. high, branched from the base; 

 leaves mostly close to the base, pinnately or bipinnately dissected into narrow 

 linear divisions; heads corymbose; involucre 12-15 mm. high; bracts more or less 

 glandular-ciliate; bracts proper linear or lance-linear; flowers tinged with rose; 

 ligules 10-15 mm. long; achenes rugose on the thick ribs. Arid regions: N.M. — • 

 s Utah— Ariz. L. Son. Mr-My. 



2. C. Parryi A. Gray. Stem more leafy, 3-5 dm. high; leaves pinnatifid, 

 with linear or lanceolate divisions; heads paniculate; involucres 12-15 mm. high, 

 bracts glandular-ciUate, in about 3 series, lanceolate, the outer squarrose; bracts 

 proper lance-linear; flowers yellow, about 15 mm. long; achenes more slender, not 

 rugose; beak with a more distinct arjicai cup. Arid regions: Ariz. — s Utah— s 

 CaUf. L. Son. My. 



12. YOUNGIA Cass. 



Low or depressed perennials, with many basal leaves. Heads several, 8-15- 

 flowered. Involucres cylindric; bracts linear, obtuse, in single series, not thick- 

 ened on the back, with 3 or 4 short calyculate ones at the base. Flowers yeUow. 

 Achenes narrow, 10-striate, tapering above and there enlarged into a disk, bearing 

 the pappus. Pappus of numerous white capillary deciduous bristles. 



Achenes conspiciiously beaked; stem 1-2 dm. high. . 1. Y. elegans. 



Achenes scarcely beaked, merely constricted below the disk; stem 5 cm. or less high. 



2. Y. nana. 



1. Y. elegans (Hook.) Rydb. Perennial, with a taproot; stem branched, 

 1-2 dm. high; leaves petioled, 5-10 cm. long; blades oblanceolate, entire to sintl- 

 ately lyrate-pinnatifid, with triangular salient lobes; heads paniculate; involucres 

 about 8 mm. high; bracts proper narrowly linear; achenes 4 mm. long. Crepis 

 elegans Hook. Barkhausia elegans Nutt. High mountains: Mack. — Sask. — 

 Wyo.— B.C.— Yukon. Mont. Jl-Au. 



2. Y. nana (Richards.) Rydb. Depressed perennial, with creeping root- 

 stock; stem 1-5 cm. high; leaves mostly basal, petioled, 2-5 cm. long; blades 

 obovate or spatulate, entire, repand-dentate, or lyrate; involucres 8-10 mm. high; 

 bracts proper linear, obtuse, with the backs thickened at the base; achenes cyl- 

 indric, about 5 mm. long, 0.5 mm. thick. Crepis nana Richards. Y. pygmaea 

 Ledeb. High mountains: Lab. — Alta. — Utah — -Ida. — B.C.; Asia. Mont. — Sub- 

 alp. Jl-Au. 



13. GLYPTOPLEURA D. C. Eat. 



Tufted annuals, with thick runcinate leaves. Involucres campanulate; 

 bracts 7-12, linear-lanceolate, in one series, and a few loose and foliaceous ones 

 at the base. Flowers white, pink, or yellow. Achenes obtusely 5-angled, oblong, 

 each interval with two rows of tubercles, abruptly contracted above into a stout 



