CHICORY FAMILY ' 1027 



few black hairs along the midvein. C. occidentalis gracilis D. C. Eat. C. exilis 

 Osterhout. Hillsides and mountain slopes: Mont. — Colo. — Xev. — Ida. Son. — 

 Submont Je-Au. 



16. C. pumila Rydb. Stem rather low and stout, 1.5-2 dm., rarely 3 dm. 

 high, canescent-tomentose, leafy; basal leaves petioled; blades 8-10 cm. long, 

 broadly lanceolate, acute, laciniate-pinnatifid about halfway to the midrib, with 

 lanceolate-triangular lobes; the stem-leaves sessile; involucres canescent, cam- 

 panulate, about 12 mm. high; principal bracts about 10, linear or linear-lanceo- 

 late. C. occidentalis costata A. Gray. Dry hillsides: Mont. — Wyo. — Utah — 

 Nev, Submont. My-Au. 



17. C, occidentalis Nutt. Stem stout, 1-3 dm. high, canescent-tomentose, 

 usually also glandular-hispid in the inflorescence; basal leaves petioled; blades 

 1-2 dm. long, broadly lanceolate or oblanceolate, runcinate-lobed or cleft, usually 

 about halfway to the midrib, canescent-tomentose, acute; lobes triangular or 

 lanceolate, often toothed; involucres campanulate, 12-15 mm. high; bracts 

 proper 9-14, tomentose. Plains and hillsides: Sask. — Colo. — ^Ariz. — Calif. — B.C. 

 Plain — Submont, My-Au. 



18. C. subacaulis (Kellogg) Coville. Stem 1-2 dm. high, striate, canescent- 

 tomentose as well as hirsute but not glandular; basal leaves petioled; cauline 

 leaves sessile, all pinnatifid or bipinnatifid, tomentose and somewhat hirsute on 

 the rachis and ribs; involucres campanulate, 12-15 mm. high; bracts proper 11- 

 17, lance-linear, tomentose and usually with scattered bristles. C occidentalis 

 subacaulis Kellogg. Dry hillsides: Calif. — Wyo, Son. — SubmonL Je. 



19. C. atribarba Heller. Stem 4-5 dm. high, tomentose or in age glabrate; 

 basal leaves petioled; blades lanceolate, 1-1.5 dm. long, deeply pinnately lobed 

 or runcinate, with lanceolate or lance-linear divisions, canescent-tomentulose, 

 long-caudate; uppermost cauline leaves much reduced and entire; involucres 

 campanulate, 12-14 mm. high, tomentose; bracts linear, somewhat scarious- 

 margined, with scattered black bristles on the back. Hills: Mont. — Ida. Son. 

 — Submont. Je. 



20. C. scopulorum Coville. Stem 1-4 dm. high, scantily tomentose, usually 

 glabrate in age, bearing scattered glandlcss bristles; basal leaves petioled, pinnat- 

 ifid or bipinnatifid, with linear or linear-lanceolate divisions, tomentose and 

 also hirsute on the veins; heads cor^inbose, long-peduncled; involucres cam- 

 panulate, 10-12 mm. high, sparingly tomentose, and sparingly greenish hispid; 

 calyculate bracts lanceolate, 2 mm. long; bracts proper 13-17, lance-linear. 

 Mountains: Mont. — Colo. — Nev. — Ore. SubmonL My-Jl. 



21. HETEROPLEURA Schultz-Bip. 



Perennial leafy-stemmed herbs, of the habit of Hieracium. Involucre cam- 

 panulate; bracts in 1 or 2 series, subequal, narrow, with a few calyculate ones at 

 the base, not thickened on the back. Flowers light yellow. Achenes tapering 

 from the base to the summit, 10-ribbed, the alternating ribs much stronger. 

 Pappus of numerous dirty white soft bristles. 



1. H. Fendleri (Srhultz-Bip.) Rydb. Stem scape-like, 2-3 dm. high, sparingly 

 setose-hirsute; basal leaves spatulate or obovate, with short wang-margined 

 petioles, setose-hirsute, the hairs long, with pustulate bases; stem-leaves few, the 

 upper or all reduced, narrowly linear, and bract-like; heads rather few, racemiform- 

 paniculate, long-pcdunchnl, nodding in anthesis; involucres campanulate, 12-14 

 nim. high; bracts proper lance-linear, puberulent or glabrate, with or without a 

 few long hairs; achenes reddish or blackish. Heteropleura ambigua (A. Gray) 

 Schultz-Bip. IlicraciumFctullcriSchultZ'Bip. IL nigrocollinus S.SYaXa. Woods: 

 (Black Hills) S.D.— N.M.— Ariz. Submont —Mont. Je-Au. 



22. HIERACIUM (Tourn.) L. Hawkweed. 



Perennial, mostly caulescent herbs, with entire or dentate leaves and panicu- 

 late heads. Involucre cylindric or campanulate; bracts in 1-3 series, subequal 

 or somewhat imbricate, not thickened on the back, with a few small calyculate 



