156 ORDER 70. COMPOSITE. 



1 V. fasciculata MX. Lvs. narrowly lanceolate, serrulate ; cyme fastigiate ; invol. 



ovoid-bell-shaped, half as long as the showy, dark-purple fls. Com. W. 3 lOf. Jl. Aug. 



2 V. Novefooracense Willd. Lvs. many, lanceolate, serrulate, rough ; cyme fas- 



tigiate : invol. scales filiform at the ends, or the upper cuspidate. Com. 3 6f. Ang. 



3 V. scafoerrima N. Lvs. all sessile, lanceolate and lance-linear, margins revolute, 



subentire ; hds. 20-30-flowered ; scales lanceolate, ciliate, protracted into long, flexu- 

 ous points. Pine-barrens, S. 2 3f. June August. 



4 V. aiigustifolia MX. Lvs. linear and lance-linear, margins revolute ; hds. 10-15- 



flowered ; lower scales some filiform-pointed. Barrens, S. 2f. September. 



5 V. o valiiolia T. & G. Lvs. many, the lower oval or oblong ; invol. bell-form, 20- 



llowercd ; scales acute or mucronate, short. Dry woods, Fla. 2 3f. June, July. 



6 V. oligopliylla MX. Lvs. mostly radical, oblong-obovate, the 2 or 3 cauline bract- 



like, lanceolate ; scales spreading, acuminate. S. 2f. June, July. 



2. STOKE SI A, L'Her. Fls. all tubular, the marginal larger, ray-like, 

 irregular ; scales of the invol. imbricated, in several rows, the outer spinu- 

 lous and leaf-like. Recept. naked. Cypsela 4-angled. Pap. of 4 or 5 awn- 

 like, rigid, deciduous scales, it Erect, with a downy stem, alternate Ivs., 

 and large terminal heads of showy blue flowers. 



S. cyama L'Her. Wet woods, S. Car. and W. : very rare. 2f. Lvp. glabrous, entire. 

 Bracts spinulous at base, gradually becoming scales, t 



3. ELEFHANTOPUS, L. ELEPHANT'S-FOOT. Heads 3-5-flowered, 

 glomerate into a compound head with leafy bracts. Fls. all 5 and equal. 

 Invol. scales about 8, in 2 series. Cor. deeply cleft on one side. Fr. rib- 

 bed. Pap. chaffy-setaceous, it Erect, with large, alternate, subses.sile Ivs. 

 Cor. purple or white. July September. 



1 E. Caroliniaiius Willd. St. much branched, leafy, hairy ; Ivs. somewhat hairy, 



ovate or oval oblong, obtuse, crenate-serrate. Dry soils, Pa. S. and W. 2f. 



2 E. tomentosus L. St. hirsute, nearly leafless, simple or dichotomous above ; root 



Ivs. hirsute-tomentous, oblong-obovate. Woods, S. 1 2f. Flowers whitish. 



4. AGERATUM, L. Heads co-flowered, , discoid. Scales linear, 

 imbricated, pointed. Recept. naked. Corollas all tubular. Cyp. 5-angled, 

 narrowed at base. Pap. 5 or 10, chaffy, awned scales. @@ Mostly tropi- 

 cal, with opposite, petioled Ivs. and corymbed heads. Fig. 75. 



A. eonyzodes L. Branching ; Ivs. ovate, tooth-crenate, acute or cordate at base, 

 somewhat rugous ; pap. scales 5, as long as the corolla, but much shorter than the 

 conspicuous styles. Wet places, near Savannah. 1 IJf. Blue or white. Apr. Jn. 

 |3. MEXICANA. Lvs. all, or nearly all, cordate. Fls. light blue, perpetual, t 



6. SCLEROLEPIS, Cass. Head co-flowered, $ , discoid. Scales 

 equal, linear, in 2 series. Recept. naked. Cor. 5-toothed. Styles much 

 exserted. Cyp. 5-angled, crowned with a cup-shaped pappus of 5 obtuse, 

 homy scales. ? Glabrous, simple, with 1 3 terminal hds. Lvs. verticil- 

 late. Flowers purple. 



S. verticillaia Cass. li In shallow water, N. J. to Fla. Erect, 1 2f, from a decum- 

 bent base. Lvs. I'm., entire, 1', in whorls of 5's and 6's. Hds. mostly solitary. Jl. Sep. 



6. CARF.HEPHORUS, Cass. Heads (about 20-flowered), involucre, 

 flowers, and fruit as in Liatris. Recept. chaffy. Pales narrow, 3-veined 



