366 Missouri Agricultural Report. 



Dwarf plantain seeds (fig. 21, f) are light-brown, oval, rounded on one 

 face, and broadly grooved on the other; found in crimson clover seed produced 

 in Atlantic Coast States. 



Field madder seeds (fig. 21, g) are oval, gray in having numerous white 

 surface spots, some of the seeds having three frail, whitish teeth, others de- 

 void of the teeth; common in seed of clover, alfalfa and grasses; confined 

 chiefly to imported seed. 



Cleavers seeds (fig. 21, h) are coarse, circular, one face rounded, the other 

 depressed in the center; the surface is covered with hair-bearing tubercles frorrii 

 which the hairs may be more or less rubbed away; the entire outer surface 

 is sometimes rubbed away, leaving the seed smooth and brown; common in 

 seed of coarse grasses, millets, cereals and flax; a common impurity of im- 

 ported seed. 



Seeds of wild corn salad representing two kinds, commonly appear in 

 clover imported from Europe. They are brown, one kind (fig. 21, i) being- 

 slenderly oval and nearly smooth, the other (fig. 21, j) being broader and usu- 

 ally more or less covered with white hairs. The presence of these seeds in 

 clover indicates its foreign production. 



Poverty weed seeds (fig. 21, k) are oval and dull brown, straight, or some- 

 what curved. They occur in alfalfa seed from the Western States; not found 

 in foreign-grown seed. 



Black-eyed Susan, or yellow daisy, seeds (fig. 21, 1) are minute, black, 

 prismatic, finely ridged lengthwise, and 4-angled; found chiefly in timothy 

 seed. 



Mayweed (dog fennel) seeds (fig. 21, m) are oval or club shaped, straw- 

 colored or brown, ridged lengthwise, the ridges more or less distinctly tu- 

 bercled; very common in both domestic and imported seed of clover and 

 grasses. 



Field camomile seeds (fig. 21, n) are prismatic, some broad and deeply- 

 grooved lengthwise, others slender and lightly grooved or smooth; color whit- 

 ish, light brown or dark brown; common in domestic and imported clover and 

 grass seeds. 



Scentless camomile seeds (fig. 21, o) are prismatic, the surface rough and 

 black, one face having three prominent brown ribs, the other showing two of 

 these ribs and a partial third rib; common in poorly-cleaned clover seed and 

 grass seed, particularly the seed of sweet vernal grass imported from Europe. 



Corn flower (blue bottle) seeds (fig. 21, p) are easily recognized by the 

 bluish color of the body of the seed and the tawny color of the brush of bristles 

 each bears; common in both domestic and imported coarse seeds, including 

 crimson clover, grasses, cereals, millets and flax. 



Cat's-ear seeds (fig 21, q) are slender, reddish brown, rough, and some- 

 times bear a slender beak tipped by a brush of whitish bristles; found in clover 

 seed and grass seed, a common impurity of imported seed. 



Oxtongue seeds (fig. 21, r) are mostly lance-shaped, reddish yellow, the 

 surface having dark transverse lines, the margin at the broader end of the 

 seed roughened (as shown at the left of the figure); a part of the seeds whit- 

 ish, curved, the inner curved edge white-hairy (shown at the upper right-hand 

 of the figure); common in poorly cleaned red clover and alfalfa seed imported 

 from Europe; not found in domestic-grown seed. 



Hawkweed picris seed (fig. 21, s) are reddish-brown, straight or curved, 

 bearing fine transverse, dark-edged ridges, the faces of the seed having one or 

 two slender grooves lengthwise; frequently found in imported red clover and 

 alfalfa seed. 



