332 BORAGINACEAE (BORAGE FAMILY) 
Range: Virginia to Ohio and Illinois, southward to Florida and 
exas. 
Habitat: Fields and waste places. 
Fig. 230.— Indian Heliotrope 
(Heliotropium indicum). 
Means of control 
A coarse, many-branched, and very 
hairy plant, untouched by grazing 
animals, robbing neighboring plants 
of much food and moisture. Stems 
one to three feet high, rather stout. 
Leaves alternate, broadly ovate to 
heart-shaped, three to six inches long 
and nearly as wide, with wavy edges 
and short, slightly margined petioles. 
Flowers in long, terminal, bractless, 
partly coiled spikes, which straighten 
as the blossoms open from the base 
upward; the season of bloom is so 
long that ripe seeds are falling from 
the bases of the spikes before the buds 
cease to unfold at the summit; co- 
rolla salver-form, violet-blue, very 
small, the tube longer than the 
hairy calyx; stamens five, included, 
the anthers nearly sessile. Fruit 
splitting into two closed carpels, 
ribbed on the back, each usually con- 
taining two seeds or nutlets. (Fig. 
230.) 
Prevent seed production by early, frequent, and persistent 
cutting. 
HOUND’S TONGUE 
Cynogléssum officinale, L. 
Other English names: Dog Bur, Dog’s Tongue, Woolmat. 
Introduced. Biennial. Propagates by seeds. 
