304 UMBELLIFERAE (PARSLEY FAMILY) 
United carpels ovoid, nearly as broad as long, each of the two 
having five sharply keeled ridges. These seeds may remain 
dormant in the soil for several years and should never be 
permitted to sow themselves. (Fig. 211.) 
Means of control 
If the infestation is new, hand-pull as soon as discovered and 
destroy it. Being annual, it is necessary only to prevent seed 
development in order to suppress the weed. 
MEADOW PARSNIP 
Thaspium atireum, Nutt. 
Native. Perennial. Propagates by seeds. 
Time of bloom: June to July. 
Seed-time: August to September. 
Range: New York to the Carolinas, westward 
to Arkansas and Nebraska. 
Habitat: Moist meadows, waste places, open 
woodlands. 
When it first appears in the spring, the 
young shoots of this plant sometimes give an 
unpleasant flavor to dairy products; later the 
cattle reject it, though it seems to be not so 
noxious as other members of its tribe. 
Stems smooth, one to two feet high, with 
few branches. Base leaves heart-shaped, 
smooth, sharply toothed, long-petioled; those 
of the stem three-parted — sometimes twice 
ternate — the lateral leaflets sessile or nearly 
so, the terminal one stalked, long ovate to 
lance-shaped, finely toothed. Flowers deep 
golden yellow, the compound umbel about two 
inches broad. Carpels small, ovoid or nearly 
globose, smooth, the ribs standing out like 
wings. (Fig. 212.) 
eee Gace: Ranging nearly with this plant is a close 
pium aureum). X%. relative, the Harry-sorintep Mrapow Parsnip 
