COMPOSITA. (COMPOSITE FAMILY.) 189 
than the heads ; scales of the involucre slightly hairy. — Damp shady soil, Flor- 
ida to Mississippi, and northward. July and August.— Stem 19-29 high. 
Leaves 3! - 6' long, 2’-4’ wide. Flowers purple. 
2. E. tomentosus, L. Rough-hairy; stem nearly naked ; radical leaves 
spreading, obovate-oblong, narrowed into a petiole; stem-leaves (1-2) small, 
lanceolate; bracts ovate or cordate, usually shorter than the heads; scales of 
the involucre very hairy. (E. nudicaulis, EL) — Dry sandy soil, Florida to 
North Carolina, and westward. June- August.— Stem 19-29 high. Radical 
leaves 4' - 10/ long, 2' wide, spreading on the ground. Flowers pale purple. 
4. PECTIS, L. 
Heads several-flowered, radiate. Rays pistillate. Disk-flowers somewhat 2- 
lipped, perfect. Involucre cylindrical. Scales 5-8, in a single row. Recepta- 
cle naked. Branches of the style short, obtuse. Achenium linear. Pappus 
composed of about five unequal bristle-pointed scales. — Chiefly annuals. 
Leaves opposite, glandular-dotted, bristly on the margins. Flowers small, 
yellow. 
1. P. linifolia, L. Stem diffusely branched (6/— 19! high); leaves linear, 
connate; heads small, on long and slender bracted peduncles; scales of the in- 
volucre slightly produced at the base; achenia hairy. — South Florida. 
Tese IL EUPATORIACE®. Heads discoid; the flowers all tubular and 
perfect: branches of the style, usually elongated, club-shaped, minutely pubescent ; 
the stigmatic lines obscure. — F lowers white, blue, or purple. 
5. CORLESTINA, Cass. 
: Heads many-flowered. Involucre nearly hemispherical ; the scales numerous, 
imbrieated, Receptacle naked or chaffy. Achenia 5-angled. Pappus cup- 
shaped, truncate or more or less prominently toothed, — Leaves opposite, toothed. 
Heads in close corymbs. Flowers blue or purple. 
1. C. maritima, Torr. & Gray. Stem diffuse, somewhat shrubby at the 
base, smooth ; leaves ovate, abruptly contracted into a slender petiole; corymbs 
few-flowered ; receptacle naked; pappus a whitish truncated margin. — South 
Florida, — Stem 19 - 2° long. Flowers blue. CAP 
6. AGERATUM, L. 
i Receptacle always naked. Pappus composed of 5-10 distinct scales. Oth- 
erwise like Ceelestina. | E 2 
