COMPOSIT&. (COMPOSITE FAMILY.) 237 
3. B. chrysanthemoides, Michx. Smooth; stem erect or ascending; 
leaves undivided, oblong-lanceolate, obscurely serrate, connate; heads radiate, 
showy ; achenia 2— 4-awned. — Wet places, Florida to Mississippi, and north- 
ward. Sept. and Oct. @)— Stem thick, 1°- 2° high. 
* * Achenia 3-4-angled, linear : heads radiate: scales of the involucre nearly 
: equal. ; 
^ B. leucantha, Willd. Stem low, 4-angled; leaves pinnately 3- 5- 
divided ; the divisions ovate. or lanceolate, serrate; the lowest ones undivided ; 
outer scales of the involucre obtuse, spreading ; the inner ones acute; rays 5, 
white; achenia 2—4-awned. — South Florida. Oct. - Dec. — Stem 10!-15!! 
high. l ! fs 
5. B. bipinnata, L. Stem tall, 4-angled, much branched ; leaves bipin- 
nate, the divisions small, ovate or lanceolate, acute; heads small; rays 2-3, 
yellow ; achenia 3 - 4-awned. — Cultivated grounds, common. Aug. and Sept. 
@— Stem 2°-5° high. 
53. SPILANTHES, Jacq. 
Heads many-flowered ; the ray-flowers often wanting. Scales of the involucre 
in 2 rows, appressed, shorter than the disk. Receptacle convex or elongated ; 
the membranaceous chaff embracing the flowers. Achenia of the disk com- 
Pressed, mostly ciliate on the margins, naked at the apex, or with 1-3 bristly 
awns; those of the rays 3-angled. — Chiefly annual and acrid herbs, with oppo- 
site undivided leaves, and solitary heads of yellow flowers on long peduncles. 
l. S. repens, Michx. Stem branching, slightly pubescent, decumbent and 
Tooting at the base; leaves ovate-lanceolate or lanceolate, slightly serrate, nar- 
rowed into a petiole; heads small, ovoid, becoming oblong-conical; achenia 
^wnless, not ciliate ; rays 12. (Acmella repens, Pers.) — Muddy banks, Florida 
to South Carolina. Sept. and Oct. ? — Stem 6/ - 19! long. 
2. S. Nuttallii, Torr. & Gray. Villous-pubescent or smoothish; stem 
diffusely branched, ascending ; leaves ovate or oblong, coarsely serrate, abruptly 
Petioled ; heads ovoid, at length oblong-conical; achenia awnless or with 1-2 
Minute awns, ciliate on the margins; rays 10-12. — Inundated places, East 
ida, Aug.- Oct. — Stem 1° - 2° long. 
54. VERBESINA, L. 
. Heads many-flowered ; the ray-flowers few, sometimes wanting. Scales of the 
involucre imbricated in 2 or more rows. Receptacle flat, or somewhat convex ; 
the chafr concave. Achenia laterally compressed, wingless, 2-awned. — Peren- 
Dial herbs. Stems mostly winged by the decurrent serrate or lobed leaves. 
Corymbose. Flowers white or yellow. 
l. V. Siegesbeckia, Michx. Stem 4-winged, branching; leaves oppo- 
| _Slotomous ; rays 1-5, yellow; achenia wingless.— Waste places, road-sides, — 
&c., Mississippi to North Carolina, Sept. — Stem 49 — 6? high. - p 
