346 COMPOSITE. Coreopsis. 



18. C. tinctoria (Nutt.) : annual, jjlabrous; lobes of the leaves linear-ob- 

 long and linear ; scales of the exterior invoUicre very short, acute ; rays 3- 

 lobed at the summit, twice the length of the interior involucre ; achenia ob- 

 long, wingless, minutely tuberculate on both sides, or sometimes nearly 

 sinoolh. — Natl. ! in jour. acad. Philad. j;. 114 ; Bart. ji. Amcr. Sept. 2. t. Ab ; 

 Bot. mag. t. 2512,- Bot. reg. I. 846,- Brit. Ji. gard. t. 72. Diplosastera 

 tinctoria, Tausch., hort. Canal., ex DC. Calliopsis bicolor, " Reichenb. mag. 

 t. 70"; Spreng. syst. 3. p. 611. C. tinctoria, DC. ! p)rodr. 5. p. 568; 

 Hook. bot. mag. t. 3511. (/3. atropurpurea). 



Damp prairies, from the Upper Missouri, {Mr. Nicollet!) to Western Ar- 

 liansas, Nuttall ! Dr. Pitcher! Dr. Leavenworth! Dr. Engelmann ! West- 

 ern Louisiana, Dr. Hale! Texas, Drumrnond ! Dr. Leavenworth! (Very 

 common in cultivation.) July-Oct. — Stem 1-3 feet high. Rays golden 

 yellow, towards the base deep brownish-purple : in cultivation nearly the 

 whole ray sometimes becomes dark purple, as figured in Bot. mag. t. 3511. 



* * Achenia winged. 



19. C. AtMnsoniana (Dougl.) : perennial, glabrous; lobes of the leaves 

 linear or linear-spatulate ; scales of the exterior involucre linear-oblong, ob- 

 tuse, somewhat scarious ; rays obtusely 3-tooihed, thrice the length of the in- 

 terior involucre ; achenia elliptical, distinctly winged, crowned with 2 very 

 short (often deciduous) subulate teeth. — Dougl. in Lindl. ! bot. reg. t. 1376. 

 Calliopsis Atkinsoniana, Hook.! JI.. Bor.-Am. 1. j^- 311; DC. ! prodr. 5. 

 p. 568. 



Oregon, near the coast, Douglas ! Dr. Scovler ! — This species, now com- 

 mon in the European gardens, appears to be the only one indigenous to Ore- 

 gon, or any part of the country west of the Rocky Mountains. It greatly re- 

 sembles C. tinctoria, but is a larger plant. 



20. C. cardaminefolia ; annual, glabrous; lobes of the leaves obovate- 

 oblong, of the upper linear-spatulale or narrowly linear; scales of the exte- 

 rior involucre very short, rather obtuse; rays 3-cleft at the summit, twice 

 the length of the interior involucre ; achenia broadly oval, winged, often with 

 2 short subulate teeth, smooth or very minutely tuberculate. — Calliopsis car- 

 daminefolia, DC! I. c. 



(3. angustiloba : lobes of the leaves all narrowly linear ; achenia tubercu- 

 late. 



Texas, Berlandier ! [3. Western Louisiana, Dr. Hale ! — The young 

 achenia are usually crowned with two subulate teeth, which are united with 

 the wing, and sometimes project a little beyond it. 



§ 3. Branches of the style truncate or terminated with a very obtuse cone: 

 achenia straight or slightly incurved,' crowned with two upwardly serridate 

 or hisjnd aicns or subulate teeth ; the ivinged margin mostly fringed or dis- 

 sected : chaff deciduous with the fruit: exterior involucre small : rays about 

 3-toothed or cleft at the summit, yellow : disk-flowers dark purple : stem, 

 naked and dicholomously corymbose at the summit : leaves o2'>posite or alter- 

 nate {often in the same species), entire or sjMringly lobed. — Coreoloma. 



* Achenia slightlij incurved, surro^mdcd icith a broad entire icing. — Calliopsidium. 



21. C. Leavenworthii : glabrous ; stem terete, slender, dichotomously 

 branched at the summit; leaves opposite, narrowly linear, entire, or fre- 

 quently with two lateral linear lobes ; the lower ones petioled ; scales of the 

 exterior involucre very short, ovate-lanceolate ; rays 3-toothed ; achenia (in- 



