392 ORDER LXVIII. OOMPOSIT-E. 



2. H. teln-uifo'lia, (T. & G.) Stem scabroii?. Leaves linear ; rays 

 10 — 12 ; chaff 3-lobed. Achenia quad rang uJar, glabrous. — Sand-hills. 

 Middle Florida. 



Genus LIT.— ACTIXOME'RIS. Nutt. 



(From aktin, a ray, and meris, a part, alluding to the few rays.) 



Involucre many-leaved, with leaves nearly equal ; ray florets 

 4 — 12, neutral ; those of the disk perfect. RecejHacle chaffy. 

 Seed compressed, marginetl, inclosed by the chaff; pappus 2- 

 awned. 



1. A. helianthoi'des, (Nutt.) Stem erect, -winged, hirsute, pubescent. 

 Leaves lanceolate, serrate, acute, scabrous, villous beneath. Flowers in 

 terminal corymbs ; involucre with leaves arranged in two series, ovate- 

 lanceolate, hispid; ray florets 10 — 12; those of the disk numerous, 

 slightly winged, hairy. — Yellow. 1^. June — July. Middle Geo. 3 

 4 feet. 



2. A. al'ba. Stem smooth and glabrous, or scabrous puberulent to- 

 ward the summit. Leaves scabrous, serrate, narrow-lanceolate, upper 

 ones often decurrent. Heads corymbose ; scales of the involucre shorter 

 than the disk ; rays none ; pappus two slender awns. — White. Com- 

 mon. Aug.— Oct." 3 — 10 feet. 



3. A. SQUARRo'sA, (Xutt.) Stem erect, winged, glabrous when old, or 

 pubescent toward the summit. Leaves lanceolate, serrate, scabrous, on 

 short petioles. Flowers in leafy panicles ; scales of the involucre ex- 

 panding, arranged in 1 — 2 series; ray florets about 4 beneath, lanceo- 

 late. Seed slightly winged, somewhat hairy. — Yellow, If. Aug. — 

 Oct. Middle and low country of Car. and Geo, 3 — 7 feet. 



4. A. nudicau'lis, (Nutt.) {Helianthus aristatiis. Ell.) Stem scabrous, 

 with slender branches. Leaves oval-lanceolate, toothed, sessile, acute ; 

 upper ones alternate, the lower opposite. Flowers in terminal corymbs ; 

 involucre pubescent; ray florets small; pappus consisting of two per- 

 sistent awns. — Yellow, If. Sept. — Oct. Western Geo. 2 — 3 feet. 



Genus LIIL— COREOP'SIS. L. 

 (From l-o/'is, a bug, and opsis, resemblance, from the form of the achenia.) 



Involucre double, each many-leaved ; the exterior equal, the 

 inner one sub-coriaceous and colored. Receptacle chaffy, with 

 flat scales. Seeds compressed, emarginate ; pappus consisting 

 of 2 awns ; ray florets neutral ; those of the disk perfect. 



a. Leaves opposite, entire. 



1. C. l.\nceola'ta, (L.) Stem procumbent, glabrous toward the sum- 

 mit, branching at the base. Leaves sessile, entire, linear-lanceolate, 

 ciliate toward the base. Flowers solitary and terminal, on long, naked 

 branches ; involucre with the leaves about equal in both series ; ray 

 florets toothed at the summit, about 8. Seed compressed, winged ; 

 pappus two subulate, hairy awns ; chaff narrow. — Yellow, if. ApriJ 

 — May. Damp soils. 1 — 2 feet. 



2. C. CRASsiFOLiA, (Ait.) (C. lanceolato,!^.) iS^m pubescent, striate, 



