364 Missouri Agricultural Report. 



crimson clover and coarse grass seeds. Another kind (fig. 20, i)has smallen,. 

 smooth, rounded seeds which are often covered by a brown hull bearing sev^ 

 eral diagonal ridges on each side; often found in imported clover and grass. 

 seeds. A third kind (fig. 20, j) has more oval, smooth seeds, some of whicbi 

 are covered by a somewhat flattened, finely hairy hull; found in imported clover 

 and grass seeds. 



Stork's-bill seeds (fig. 20, k) are somewhat club shaped, smooth, brown,, 

 and often covered by a sharp-pointed, brown, hairy hull; found in clover, alfalfa, 

 and grass seeds; commonest in imported seed. 



Spurge seeds (fig. 20, 1) are steel gray or dark brown, oval, and somewhat 4- 

 angled, the angles lightest colored, a few cross-ridges between the angles, one- 

 of the angles bearing a slender, black line; common in American red clover 

 seed. 



Spiny sida seeds (fig. 20, m) are brown, rounded on one side, angular on the 

 other, and notched at the broader end; common in American-grown red clover 

 seed; the forked, often netted-veined seed vessels (shown at right-hand side 

 of figure) sometimes appear in poorly cleaned clover, but are more commoni 

 in grass seeds. J"-- 



Evening primrose seeds (fig. 20, n) are small, reddish brown, and angular, 

 prismatic, or curved; the corners are thin-edged, the faces finely grooved; com- 

 mon in timothy and sometimes found in clover seed. 



Red pimpernel seeds (fig. 20, o) are small, 3-angled, and reddish brown;, 

 surface finely roughened or sometimes partly smooth and black; somewhat re- 

 semble seeds of sorrel (fig. 19, h) having the chaffy covering; very common in 

 imported clover and alfalfa seeds, often in grass seed. 



Sticktight seeds (fig. 20, p) are small, oval, brown burs having many barbed 

 prickles; when in clover, most of the prickles are usually broken away; when 

 in grass seeds, some or all of the prickles are usually uninjured; found in red 

 clover, particularly that from Canada, in seed of coarse grasses, millets, cereals, 

 and flax; often in seed imported from Europe. 



Forget-me-not seeds (fig. 20, q) are small, black, shining, oval, rounded' 

 on one face, and angled on the other; common in imported clover and grass 

 seeds. 



Vervain seeds (fig. 2a, r, s and t) are oblong, reddish or dark brown, veined) 

 on one side, angled and often gray on the other. One kind (fig. 20, r) has a 

 distinct network of ridged veins on the back, the surface between the veins 

 shining; common in European clover and alfalfa seeds. The other two kinds 

 of vervain commonly found in farm seeds have indistinct veins on the back: 

 which is dull, one of them (fig. 20, s) being comparatively broad and brown; 

 the other (fig. 20, t) being slender and lighter, reddish colored; seeds common 

 in American-grown clover seed. 



Catmint seeds (fig. 21, a) are oval, dark reddish brown or darker, smooth' 

 and dull, readily distinguished by the two white scar spots, side by side at one 

 end of the seed; common in clover seed, particularly Canadian-grown alsike. 



Healall seeds (fig. 21, b) are light brown, oval, with a characteristic whitish, 

 appendage at the pointed end, faint dark lines traversing the faces and edges;, 

 one of the commonest impurities of both domestic and imported clover and 

 gra.ss seeds. 



Rough-leaved toadflax seeds (fig. 21, c) are very small, oblong, having a. 

 light-brown, wrinkled surface; plants not evidently important, but the seeds, aa 

 common impurities of imported clover seed, indicate the foreign origin of: 

 the lots containing them. 



