LABIATAE (MINT FAMILY) 349 
to lance-shaped, pointed at both ends, finely clammy-hairy on 
both sides, entire, with very short petioles. Panicles loosely 
spreading, the flowers single or in pairs 
on forking branchlets, subtended by paired 
bracts; the flowers are blue, sometimes 
pink or white, their most noticeable feature 
being the four very long, upcurving, violet 
stamens, thrust far out beyond the corolla — 
more than as long again; in the bud they 
are spirally coiled and both the common 
name and the “book-name”’ have reference 
to their remarkable appearance; corolla 
tube very slender, its lower lobe oblong 
and declined; calyx unequal, with three 
long and two short lobes, and when the 
withered corolla falls the four small, rough- 
ened, ovoid nutlets are in plain sight. 
(Fig. 241.) 
Means of control 
Enrich the land; when cultivated and 
supplied with humus, which will enable 
the soil to retain moisture, the drought- 
loving weed will disappear. 
HOREHOUND 
Marribium vulgare, L. 
Fie. 241. — Blue 
Curls (Trichostema dicho- 
tomum). 4. 
Other English names: Marrube, Houndsbene, Marvel. 
Introduced. Perennial. Propagates by seeds. 
Time of bloom: June to September. 
Seed-time: August to November. 
Range: Maine and Ontario to South Carolina, Tennessee, and Texas. 
British Columbia to California. 
Habitat: Dry soil; upland fields and pastures. 
A most troublesome weed where sheep are kept, for the long 
points of the calyx-lobes harden into hooked spines which catch 
in the fleeces to the detriment of the latter and which also help 
