340 COMPOSITE. Coreopsis. 



eions linear, elongated, sparingly toothed ; the lateral shorter, lobed or incised. 

 — Diodonta leptophylla, Nutt. in trans. Amer. pJiil. soc. I. c. 



y. incisa : lower leaves bipinnately parted or divided ; the upper pinnately 

 3-7-parted, the divisions incised or toothed. — C. niitis, Miclix. ! fl. 2. p. 138. 



Wet places tliroughout the Soiilhern States! originally described from a 

 specimen collected in East Florida hy Bartram ! (v. sp. in licrh. Banks.) 

 Aug.-Oct. — @? Stem 2-4 feet high, at length much branched. Rays 

 about 8, obovate-oval, rather large. Achenia 2-3 lines long, commonly not 

 more tlian half as large as in C. trichos]3erma, and proportionally broader: 

 the summit emarginate-truncate, or vvitli very short somewhat hairy teeth. 



4. C. tricliosperma (Michx.) : glabrous; stem somewhat 4-angled ; leaves 

 on short sparsely ciliate petioles, pinnately 5-7-paried or divided ; the divi- 

 sions lanceolate or linear-lanceolate, serrate or incised ; the uppermost leaves 

 often 3-5-cleft, nearly sessile ; heads paniculate-cor^ymbose ; scales of the 

 exterior involucre about the length of the interior, linear or subspatulate, 

 somewhat ciliate; achenia narrowly cuneiform-oblong, minutely and sparse- 

 ly hairy, hispidly ciliate above, crowned with two triangular-subulate hispid 

 teeth or stout awns.— Mjc/?x. .' ji. 2. p. 139 ,• Pursh, fi. 2. p. 568; Ell. sk. 2. 

 p. 439 ; Biirel. ! ji. Bost. ccl. 2. p. 315 ; DC. ! jnodr. 5. p. 572. C. mitis, 

 Ell. I. c. S^- DC. l. c, as to char. C. aurea, Lindl. hot. reg. t. 1228. 



/?. achenia smaller; the teeth shorter, and sometimes obsolete ! 



Swamps, Massachusetts! and New York ! to Carolina. Aug.-Oct. — (§)? 

 Stem 1-2 feet high, rriuch branched. Leaves membranaceous. Rays 

 sometimes an inch long, showy, bright yellow. Achenia when mature 4-6 

 lines long, including the stout teeth, which sometimes taper into short erect 

 awns, but are variable, and occasionally almost wanting: the prominent ridges 

 also not unfrequently produced into obscure intermediate teeth, and all the 

 teeth somewhat connected. — Either this or the preceding species is the 

 C. coronata of the Linntean herbarium (Virginia, Sp. PI.) ; but the charac- 

 ter, synonymy, and observations all relate to a West Indian plant, the Bidens 

 pentaphylla, &c.. Plum. Amer. cd. Burm. t. 53, /. 2, which is ])robably 

 Bidens leucantha. — Tlcksecd-Sunjloiver. 



5. C. aristosa (Michx.): minutely pubescent, or rarely glabrous; stem 

 quadrangular below; leaves pinnatel3% the loAver bipinnately 5-7-parled or 

 divided, petioled ; the divisions lanceolate, sharply serrate, incised, or incise- 

 ly pinnatifid; heads paniculate-corymbose, numerous, peduncled ; scales of 

 the exterior involucre (10-12) about the length of the interior, linear-oblong, 

 minutely hispid or ciliate ; achenia flat, oblong-obovate, surrounded with an 

 obscure wing or margin, strongly hispid-ciliale ; the hispid awns slender, di- 

 verging, about the length of the achenium. — Michx..' JI. 2. j)- 140,- DC. I. c. 

 C. "aristata, Wdld. spec. 3. p. 2253 ,• Pursh, I. c. (excl. local. S. Car.) 

 Diodonta aristosa, Nutt. ! in trans. Amer. phil. soc. I. c. 



Swamps, Michigan! Ohio! Missouri! to Western Louisiana ! Aug.- 

 Sept. — @? Stem 2-3 feet high, at length brachiately much branched. 

 Rays large. Awns (sometimes 4 in number) somewhat variable in length, 

 but longer and more slender than in any related species ; the achenium also 

 broader and flatter, with very hispid margins ; the surface likewise sparingly 

 hispid. If we mistake not, the achenia are sometimes awnless ! 



6. C. involucrata (Nutt.) : minutely pubescent ; stem quadrangular be- 

 low ; leaves 1-2-pinnately 3-7-parted ; the divisions linear-lanceolate, in- 

 cisely toothed ; heads paniculate ; scales of the exterior involucre (about 20) 

 linear-lanceolate, hirsute (as well as the peduncles), longer than the interior; 

 ovaries oval, hispid-ciliate, 2-toolhed at the summit. — JSlutt. ! in jour. acad. 

 Philad. 7. p. 74. Diodonta involucrata, Nutt..' in trans. Amer. phil. 

 soc. I. c. 



