COMPOSITAE (COMPOSITE FAMILY) 505 
what auricled. Flower-heads yellow, without rays, about a 
quarter-inch broad, the bracts of the involucre linear, with a few 
awl-shaped outer ones which are black-tipped. Achenes oblong, 
finely ribbed, minutely hairy, with a very copious, fine, white 
pappus, by help of which they are widely wind-sown. 
Means of control 
Frequent hoe-cutting while the plants are too young to develop 
seed. A spray of four-per-cent Copper-sulfate solution will blast 
buds and temporarily check seed development, but will not harm 
the smooth foliage, so that the plant recovers and the operation 
requires to be repeated. 
BUTTERWEED 
Senécio glabéllus, Poir. 
(Senécto lobdtus, Pers.) 
Other English name: Cress-leaved Groundsel. 
Native. Annual. Propagates by seed. 
Time of bloom:. March to June. 
Seed-time: May to July. 
Range: North Carolina to southern Illinois 
and Missouri, southward to Florida, Texas, 
and New Mexico. 
Habitat: Fields, meadows, and waste places. 
A rather stout, coarse plant, with furrowed, 
hollow, and succulent stem, one to three feet 
tall, sparingly branched. Leaves alternate, 
three to ten inches long, smooth, fleshy, and 
tender, and most variable in shape; they are 
pinnately divided, the segments rounded or 
oblong or spoon-shaped or pointed, with wavy- 
toothed edges or entire, but usually with ter- 
minal segment larger than the others; the 
‘basal and lower leaves have slender petioles, 
but those above are sessile. Flowers in open Is 
corymbose clusters, the heads about three- Sag ee 
fourths of an inch broad, bright yellow, with  terweed (Senecio gla- 
six to twelve broad, wedge-shaped rays. bellus). x %. 
