COMPOSITAE (COMPOSITE FAMILY) 487 



a lens: lowest leaves opposite, the pairs remote, very thin, deltoid-ovate, 

 5-8 cm. long, acute, coarsely serrate-toothed; the upper and those subtend- 

 ing the branches of the panicle alternate, all with slender and rather long 

 petioles: involucres 6-7 mm. high, strongly imbricated; the bracts ovate to 

 oblong-linear, obtuse, strongly nerved and tomentose-ciliate : flowers ochro- 

 leucous: achenes with 5 prominent angles and as many intervening ribs, not 

 glandular, the angles and ribs scabrb-serrulate. (Coleosanthus ambigens 

 Greene, Bull. Torr. Bot. Club 25: 118. 1898; C. Garrettii A. Nels. Proc. Biol. 

 Soc. Wash. 20: 38. 1907.) New Mexico, Colorado, and Utah. 



3. Brickellia Wrightii Gray, PL Wright. 2: 72. 1853. Usually much 

 branched from a woody base, 3-10 dm. high, puberulent, sometimes a little 

 scabrous: leaves broadly deltoid-ovate, or rounded-cordate and obtuse, or 

 at most acute (but not prolonged upward), more or less crenate-dentate 

 (larger cauline 3-4 cm. long, smaller only 1 cm.) : heads glomerate-paniculate, 

 the clusters shorter than or little surpassing the subtending leaves: involucre 

 often purple, turbinate, 10-20-flowered ; bracts either obtuse or acute, the 

 outer short-ovate, the inner linear: corolla ochroleucous : pappus white. 

 [Brickellia (Coleosanthus) albicaulis (Rydb.), Bull. Torr. Bot. Club 31: 646. 

 1904.] Colorado and Utah to Texas and Arizona. 



4. Brickellia microphylla Gray, PL Wright. 1: 85. 1852. Glandular- 

 puberulent or pubescent and viscid, 3-5 dm. high, from a partly woody base, 

 paniculately much branched; the short leafy branchlets terminated by 1-3 

 heads: leaves subcordate or ovate to oblong, when old somewhat scabrous, 

 obtuse or apiculate, sparingly denticulate or nearly entire, the larger 10-14 

 mm. long, those of flowering branchlets 2-5 mm. long: heads 10-12 mm. long, 

 about 15-flowered; involucral bracts firm, the outer with green and spreading 

 tips, the lowest herbaceous and passing into the leaves of the branchlets. 

 [Brickellia (Coleosanthus) scaber (Greene), Pitt. 3: 100. 1906.] From Col- 

 orado and Wyoming to Oregon. 



5. Brickellia atractyloides Gray, Proc. Am. Acad. 8: 290. 1870. Stems 1-3 

 dm. high, woody except the new shoots, much branched: leaves ovate-acumi- 

 nate, green, minutely scabrous-atomiferous, 3-nerved and reticulate-veined, 1-3 

 cm. long: branchlets terminating in a solitary and slender-pedunculate head: 

 involucre campanulate; the bracts firm-chartaceous; outer ovate, acuminate, 

 little shorter than the linear-lanceolate innermost, 10-13 mm. high, 35-50- 

 flowered. (Coleosanthus venulosus A. Nels. Bot. Gaz. 37: 262. 1904.) Arid 

 areas; Colorado to California. 



6. Brickellia linifolia Eaton, Bot. King's Exp. 137. 1871. Minutely glandular- 

 puberulent; stems 1-several, 2-4 dm. high from a woody rootstock, simple 

 or corymbose at the summit: leaves numerous, alternate, sessile, elliptical- 

 lanceolate to linear, entire, obscurely 3-nerved, 2-3 cm. long: heads large, 1 or 

 more on elongated somewhat leafy branches: involucre 40-50-flowered, the 

 scales in several series, outer ones ovate, inner ones linear, acute: branches of 

 the style club-shaped, exserted : achenes with a double row of minute bristles 

 along the striae; pappus obscurely plumose. [Brickellia (Coleosanthus) humilis 

 (Greene), Pitt. 4: 124. 1900.] Sandy banks; Colorado to the Sierra Nevada. 



6. LIATRIS Schreb. BLAZING STAR 



Erect perennial herbs, usually from a globular tuber, simple or little 

 branched, with alternate, entire, 1-5-nerved leaves, and spicate or racemose 

 discoid heads of rose-purple flowers. Involucre oblong, ovoid, or subhemi- 

 spheric, the bracts imbricated in several series, the outer shorter. Receptacle 

 flat or slightly convex, naked. Corolla regular, the tube slender, the limb 

 5-lobed or 5-cleft. Style branches elongated, obtuse or flattened at the apex. 

 Achenes 10-ribbed, slender, tapering to the base. Pappus of 1 or 2 series of 

 slender, barbellate or plumose bristles. (Laciniaria Hill.) 



Heads 4-6-flowered; pappus plumose . . . . . . . 1. L. punctata. 



Heads 50-70-flowered; pappus minutely barbellate . . * , 2. L, ligulistylis. 



