HELJANTH0S COMPOSITE 343 



COREOPSIS 



In moist meadows, southern Oregon and northern California. 



2 Perennials. Receptacle convex to low-conical. Lower 

 leaves almost always opposite. Disk-flowers yellow with dark 

 anthers. 



H. Xuttallii T, & G. Fl, ii, 324. Stems slender, 1-4 feet high, common- 

 ly simple : leaves lanceolate or the upper linear, broader toward the base 

 and tapering to an acute or acuminate apex, serrulate or entire, 3-6 inches 

 long by 3-9 lines broad, short- petioled or subsessile, scabrous both aidesj 

 in small plants not rarely all opposite: heads half-inch high or more: 

 bracts of the involucre naked, or somewhat hirsute at base, lanceolate-sub- 

 ulate, attenuate, fully equalling the disk, herbaceous, loose or soon squarr- 

 ose-spreading : rays about an inch long: paleee of the pappus long and nar- 

 row. In damp places, eastern Oregon to Brit. Columbia and the Rocky 

 Mountains. 



H. Cusickii Gray Proc. Am. Acad. xxi, 413. Stems numerous from a 

 thick perpendicular resiniferous root, forming clumps, at length resting on 

 the ground in an entangled mass, about a foot long: leaves mostly altern- 

 ate, linear-lanceolate, entire, obtusish, attenuate at base but sessile : invo- 

 lucre about half-inch high, its linear-lanceolate bracts hairy-ciliate, acu- 

 minate, lax: rays 1-1 j^ inches long: achenes glabrous: palese of the pap- 

 pus oblong-lanceolate. On dry hills and sage-brush plains, eastern Oregon 

 and Washington. 



H. TUBEROSA L. Sp. ii, 906. (JERUSALEM ARTICHOKF ). Stems usually 

 pubescent or hirsute, 5-10 feet high, branching at the top : leaves mostly 

 alternate on the branches and on the upper part of the stem, ovate or sub- 

 cordate, sometimes oblong, acuminate, thickish-membranaceous, dull green 

 minutely pubescent and occasionally cinereous beneath, soon scabrous 

 above: bracts of the involucre lanceolate, attenuate-acuminate, hirsute, at 

 least the margins toward the base : rays 12-20, often 1% inches long : chaff 

 of the receptacle hirsute-pubescent on the back : achenes more, or less pu- 

 bescent : horizontal rootstocks enlarging at the apex into tubers which are 

 sweet and edible. Escaped from cultivation and becoming common along 

 Rail Roads. 



Subtribe iv, Bidentidese Less. Syn. 229. Achenes obcompressedor 

 sometimes terete and the subtending chaffy bracts flat or barely con- 

 cave. Ray-flowers ligulate, neutral, or wanting; disk-flowers herma- 

 dite and fertile. Style-tips of the disk flowers produced into a cusp 

 or cone or sometimes truncate. 



44 COREOPSIS L. Gen. n. 931. 



Annual biennial or perennial herbs with mostly opposite leaves 

 and long-peduncled heads of yellow pink or brown ray-flowers. 

 Involucre usually hemispheric, its bracts in 2 distinct series, all 

 united at base, those of the outer series commonly narrower and 

 shorter than the inner. Receptacle flat or slightly convex, chaffy, 

 the chaff flat or concave, Ray -flowers neutral ; those of the disk 

 perfect, fertile, their corollas with slender tube and broader 5- 

 toothed limb. Anthers mostly entire at base. Style-tips trun- 

 cate or subulate. Achenes flat, orbicular to oblong, winged or 

 wingless, 



C. Atkinsoniana Dougl. Lindl. Bot. Reg. 1. 1379. Glabrous throughout : 

 biennial: stems stoutish, 1-4 feet high, with numerous opposite branches: 



