LEGUMINOSAE (PULSE FAMILY) 231 
YELLOW OR HOP CLOVER 
Trifolium agrarium, L. 
Introduced. Annual. Propagates by seeds. 
Time of bloom: June to August. 
Seed-time: July to September. 
Range: Nova Scotia and Ontario to Michigan and Iowa, south- 
ward to Virginia. 
Habitat: Meadows, roadsides, and waste places. 
Were there no larger and better Clovers, this plant could not be 
characterized as a weed ; but, as it is, the places that it holds might 
be better occupied, and its seeds are a frequent 
impurity among those of its larger relatives. 
Stems smooth, slender, branching, usually erect, 
six to fifteen inches in height. Leaves light 
green, on petioles but little longer than the 
cohering, narrow, lance-shaped stipules; the leaf- 
lets all grow from the same point, and are sessile, 
about a half-inch in length, obovate or oblong, 
and edged with very minute teeth. Heads 
axillary on peduncles much longer than the 
leaves; they are small, oblong, rounded, densely 
crowded, golden yellow, the flowers having rather 
narrow, incurled standards and short, blunt keels ; 
the corollas are persistent and each flower turns 
downward on the stalk as it is fertilized, finally 
becoming dry and brown, the withered heads 
resembling small dried hops. The pods are one- 
seeded. (Fig. 164.) 
Fic. 164. — Yel- 
low or Hop Clover 
(Trifolium — agra- 
Means of control . rium). X4. 
Prevent seed development and distribution by early and frequent 
cutting. Cultivate and reseed the ground with larger and better 
forage plants. 
LOW HOP CLOVER 
Trifolium procimbens, L. 
Introduced. Annual. Propagates by seeds. 
Time of bloom: May to September. 
