218 COMPOSITAE. (COMPOSITE FAMILY.) 
r 
cled, the terminal ones clustered; pappus of the fertile flowers 3-4 times as - 
long as the involucre. — Low ground, near the coast, Florida and north wee 
Sept. and Oct. — Shrub 29 - 12? high. 
2, Ik glomeruliflora, Pers. Branches angled ; leaves wedge-obovate, - js 
coarsely toothed, rigid; the uppermost obovate, entire; heads very numerous, . 
in dense sessile hry clusters ; pappus of the fertile fore twice as long as - 
the involucre. (B. sessiliflora, Michx.) — Swamps along the coast, Florida fo ; 
North Carolina, November. — Shrub 69— 129 high. i 
3. B. angustifolia, Michx. Branches numerous, angled ; leaves linet : 
entire ; heads single, ór2-4in a terminal cluster; achenia smooth. — Saline . 
marshes, Florida to North Carolina. Oct.— Shrub 4°- 8° high. Heads small. 
28. PLUCHEA, Cass. 
Heads many-flowered ; the central flowers mostly perfect, but sterile, with 
the corolla dilated and 5-cleft; the others pistillate, slender, slightly toothed. 
Anthers bicaudate. Scales of the involucre imbricated. Receptacle flat, 
mostly naked. Achenia grooved or angled. Pappus a single row of capil 
lary slightly scabrous bristles. — Odorous mostly pubescent and glandular . 
herbs, with alternate ovate or oblong serrate leaves. Heads of purplish flowers . 
corymbose. zen 
1. P. bifrons, DC. Stem simple, or sparingly branched ; leaves oblong, - 
acute, denticulate, strongly reticulated and rugose, cordate and clasping ; heads 
clustered ; involucre pubescent and viscid. (Conyza bifrons, Ell.) — Margins of 
pine-barren ponds, Florida to North Carolina. September. — Stem 1°-2° high. - 
Flowers pale purple or white. 
2. P. foetida, DC. Minutely pubescent and glandular; leaves large, 
membranaceous, ovate-lanceolate, acuminate, serrate, tapering into a petiole ; 
corymbs axillary and terminal; heads rather small, numerous, on slender pedi- 
cels ; involucre smoothish, often purplish. (Conyza Marylandica, EU. ?)— 
Datip soil, Florida, and northward. September. — Stem 2°-5° high. — 
5/-8' long, resinous-dotted. Flowers purple. 
3. P. camphorata, DC. Minutely pubescent and pe 
leaves ovate-lanccolate or oblong-ovate, acute, denticulate, nearly sessile ; ; 
rather large, in a dense corymb, on short and stout pedicels ; scales of the invo- - 
lucre pubescent, the inner ones long-acuminate. — Salt marshes, Florida t0 — 
North Carolina. September. — Stem 1? -29 high; the branches few and erect = 
Leaves : 2'-3! long. Flowers light purple. , ids 
4. P. ‘purpurascens, DC. Tomentose and glandular; leaves ovate | 
lanceolate, acute or acuminate, sharply and somewhat erosely serrate, on slender | 
petioles ; heads rather small, on slender pedicels, loosely corymbose ; scales ME 
the involucre pube scent, the Fae O eee acute. — Tera and low 
