COMPOSITAE (COMPOSITE FAMILY) - 495 
alternate, oblong, obtuse, scallop-toothed, one or two inches in 
length, many with a pair of small lateral lobes near the base but 
others without, those of the stem sessile except the lowermost. 
Heads numerous in open corymbose clusters, some with rays but 
oftener without; rays, when present, are white, short, and spread- 
ing; all the florets are fertile; bracts of the involucre narrow, 
obtuse, somewhat hairy. Achenes slightly angled with a short 
cup-like crown for pappus. 
Means of control the same as for Tansy. 
TANSY 
Tanacetum vulgare, L. 
Other English names: Bitter Buttons, Ginger Plant, Parsley Fern. 
Introduced. Perennial. Propagates by seeds. 
Time of bloom: July to September. 
Seed-time: August to October. 
Range: Nova Scotia and Ontario to Minnesota, southward to 
Georgia and Missouri. 
Habitat: Roadsides, farmyards, and waste places. 
An escape from garden cultivation. The oil 
listilled from the plant, mixed with that of 
Fleabane and Pennyroyal and diluted with 
uléohol, make a “mosquito dope” useful to 
aunters and fishermen and others who must. 
work where mosquitoes are troublesome. Col- 
ectors receive three to five cents a pound for 
the dried leaves and tops, gathered when in 
‘ull-bloom. (Fig. 344.) 
Stem one to three feet high, rather stout, 
smooth, usually unbranched, except at the 
Jowering top. Leaves alternate, the lower 
mes sometimes a foot long, deep green, smooth, 
yinnatifid, the segments narrow, acute, and 
‘oothed, the petioles often with toothed mar- 
zins; upper leaves smaller and less divided. 
Heads numerous in terminal corymbose clus- 
Fig. 344. — Tansy 
‘ (Tanacetum vulgare). 
‘ers, less than a half-inch broad, yellow, the x3. 
