27a ANNUAL, REPORT OF THE Off. Doc. 



iu Ciiuison CIovcl odIj, aud there iu very small quantities. Not 

 more tliau three samples coutained il (Nos. I'S'S, IGl and 173). Here 

 again the seed is enough smaller than the seed of Crimson Clover 

 that it could be easily and entirely sejjarated in the cleaning process. 



Black Mustard (iirassiea nigra (L) Koch). A weed commonly 

 known to farmers. It grows from 2 to 5 feet high and may be readily 

 recognized by its turnip-like characters. The seeds closely resemble 

 those of the turnip, aud were present only in one sample of seeds 

 under examination (No. 161), being a Crimson Clover reported as 

 coming from Ohio. 



Black Ilenhane (Ilyoscyamus niger L). xV member of the Night- 

 shade family, naturalized from Europe, found in the Northern States 

 from Nova Scotia to Michigan, south to New York. It grows from 

 one to two feet high aud has a very disagreeable odor about its 

 leaves. The seeds were found, as in the preceding case, only in 

 sample No. IGl Crimson Clover, from Ohio. 



Bulbous Buttercup (Ranunculus bulbosus L). There are several 

 Buttercups w'hose seeds are likely to occur in agricultural seeds. 

 They are not very obnoxious weeds, but are widely distributed, being 

 found mostly in w^et places. A few seeds per pound were found in 

 two samples of Crimson Clover from the West (Nos. 25 and 161). 

 These two samples, though above the standard in purity, possessed 

 the greatest amount of impurities of all in the Crimson Clover. 



Cahljage (Brassica oleracea var.) Just how Cabbage could become 

 an impurity iu Crimson Clover seed is not easily accounted for. Pos- 

 sibly as an accident iu the careless handling of the seeds in the 

 store, rather than in the process of harvesting and cleaning. The 

 Cabbage seed was found in two samples (No. 173 aud 182), from the 

 diil'erent stores in Pittsburg. It was also present in large (juan- 

 tity in a sample of Onion from Reading. 



Clover^ Bed (Trifolium pratense L.) The seeds of Red Clover are 

 a very common impurity in agricultural seeds and while it cannot be 

 regarded as a weed in ordinary farm crops, it is often objectionable 

 when it occurs in Blue CIrass seed used upon Jawns. It was present 

 in about 50 per cent, of samples of Kentucky Blue Grass examined, 

 38 per cent, of Crimson Clover, 44 per cent, of Alsike, 94 per cent, of 

 Orchard Grass and 50 per cent, of Timothy. Red Clover seed is 

 more expensive than any of these just referred to, excepting the 

 Alsike, and hence, where it is not objectionable in the crop it may be 

 tolerated in the seed. 



Clover^ White (Trifolium repens L.) White Clover seed occurred 

 as an impurity in only two samples of Timothy and three of Kentucky 

 Blue Grass. Where the latter wore marked "Mixtures" for lawns, 

 the samples conlaiiu^d from 10 ])er cent, to 60 per cent, of White 



