COMPOSITE. 187 



32. LEPACHYS. Raff. Lepachys. 



(From the Greek Xsn-t? , a scale, and TTU^VS, iJiick ; in reference to the chaff of 

 the receptacle.) 



Heads many-flowered ; the ray flowers few, in a single series, 

 neutral ; those of the disk small, tubular, perfect. Scales of 

 the involucre few, linear or subulate, spreading, sometimes with 

 an inner series of small obtuse scales. Receptacle elongated, 

 spiciform ; chaff truncate or obtuse, thickened and hairy at the 

 summit. Achenia of the ray 3 -angled, hairy ; of the disk, 

 compressed, smooth or ciliate. 



L. pinnata Torr. <$ Gr. : leaves pinnate ; leafets 3 7, oblong-lanceo- 

 late, acuminate at each end, sparingly serrate, the uppermost undivided ; 

 rays much longer than the disk. Rudbeckia pinnata Mich, and R. digitata 

 WiUd. Obeliscaria pinnata D, C, 



Shores of Lake Erie, N. Y. Dr. Sartwett. Penn. S. to Flor. W. to Miss. July 

 Sept. 1|.. Stem 34 feet high, rough and pubescent, sulcate. Heads ter- 

 minating the branches ; rays slightly toothed at the apex, bright yellow ; disk 

 flovxrs with short recurved teeth. Tall Lepachys. 



33. COREOPSIS. Linn. Coreopsis. 



(From the Greek topis, a bug, and ot^jf, resemblance; in allusion to the form 

 ol the achenia.) 



Heads many-flowered ; ray flowers about 8, neutral ; those 

 of the disk tubular, perfect. Involucre double, each of about 

 8 scales ; the outer narrow, leafy, spreading ; the inner broader 

 and somewhat membranaceous. Receptacle flat or slightly 

 convex, chaffy. Achenia obcompressed, often 2 -toothed or 

 2-awned at the summit ; the awns smooth or hispid upwards. 

 * Leaves alternate. 



1. C. gladiata Walt. : stem smooth, terete, dichotomous at the summit ; 

 leaves alternate, somewhat fleshy, entire or slightly lobed ; lower oblong- 

 lanceolate, tapering into a long and somewhat clasping petiole ; scales of 

 the outer involucre ovate-lanceolate ; achenia obovate-oblong, surrounded 

 by a pectinate wing. C. dichotoma Mich. 



Swamps. N. J. ? N. Car. to Flor. July Sept. .Stem 23 feet high, 

 slender. Lower leaves large. Heads on the dichotomous branches; rays 3- 

 lobed, yellow ; disk dark purple. Forked Coreopsis. 



** Leaves opposite, undivided. 



2. C. rosea Null. : stem smooth, leafy ; leaves opposite, narrow-linear, 

 entire ; heads few, peduncled ; scales of the outer involucre much shorter 

 than the inner ; rays unequally 3-toothed ; achenia nearly naked. Cal- 

 liopsis rosea Spreng. 



Swamps. N. Y. and Mass, to Geor. Aug. 1\..Stem about a foot high, 

 sparingly branched. Heads few; rays about 8, rose-color ; disk yellowish. 



Rose-colored Coreopsis. 



