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ASSOCIATED SEEDS, INC. 
BLACK MEDIC (Yellow Trefoil) Medicago lupulina 
A biennial winter-hardy pasture legume, more closely related to alfalfa than the 
bur-clovers. Only adapted to moist, fertile, well-drained limestone soils. It 
takes the place of bur-clover where greater cold-resistance is required and is 
very suitable for sowing with Bermuda grass, Dallis grass, Kentucky bluegrass, 
and Ryegrass pasture to furnish grazing and maintain soil fertility. It will stand 
heavy grazing and trampling. Plants produce a dense, thick growth of short, 
creeping to sub-erect, soft, succulent, fine, leafy stems readily recognized by the 
small yellow flowers and the black one-seeded pods. 
CALIFORNIA BUR-CLOVER Medicago hispida 
So called because the seeds are enclosed in pods which have short spines or burs. 
The most valuable and most used of the winter bur-clovers for permanent pasture 
in Bermuda grass, Dallis and Carpet grass to furnish abundant green grazing while 
these grasses are dormant. It maintains the soil fertility and succeeds best on 
soils relatively high in lime, moist and well drained. The trailing leafy stems 
are readily grazed by all classes of livestock. Sometimes used as a green manure 
crop. In contrast to alfalfa and Black Medic, bur-clovers have a shallow, 
spreading root system enabling them to grow readily on sod land. For best 
results, plant hulled and scarified seed of known variety and origin, 
CLOVER 
Trifolium spp. 
The primary use of the Trifoliums or true clovers is to furnish grazing and maintain 
fertility. There are kinds adapted to almost any climate and soil condition, but all 
prefer a fairly moist and fairly fertile soil. 
PERSIAN (Shaftal) Trifolium resupinatum 
A winter annual pasture and hay clover which is becoming more popular as the 
demand for more and better legumes increases. Well adapted in the South on 
heavy moist clay soils and on irrigated land, where it yields a high tonnage of 
good quality hay relatively easy to cure. Has proven satisfactory as a green 
manure crop for soil improvement. Plants spreading when grazed; but erect 
(1-2 ft.) when thickly planted and not grazed. Stems leafy, fine, numerous, soft 
and succulent; flower heads pink, very fragrant; seeds about the size of White 
Dutch, but shiny and dark green to purple. 
WHITE DUTCH Trifolium repens 
The most popular clover for lawn grass mixtures. Grows best in the cool moist 
periods of the fall and spring, flourishing on well-drained, moist soils high in lime 
content. It adds forage value when sown with such grasses as Dallis, Carpet, 
Bermuda, and Kentucky bluegrass. Plants perennial, 3-12 inches; stems fine, 
numerous, leafy, creeping, soft and succulent; developing roots at the joints. 
Seeds very small, yellow to red, heart shaped. 
YELLOW HOP (Hop) Trifolium dubium 
An annual winter and spring clover better suited to drier upland soils than White 
Dutch. Furnishes excellent grazing and improves the soil. Plants spreading to 
erect; stems numerous, fine and leafy, inclined to be woody, but not tough at 
maturity; flower heads yellow; seeds very small, shiny, oblong. Often found 
in mixtures with White Dutch. 

Harvesting clover for seed 
