EXPLANATION OF FORM. 11 



EXPLANATION OF FORM. 



The heading of the form has spaces for writing in the variety name 

 or number, the place where grown, and the year grown. There is 

 also space for giving size of plat or field grown, or, in case very small 

 plats or single plants are the basis of the description, the number of 

 plants should be stated. After the word Triticum the species, whether 

 sestwum (vulgare) or durum, should be written. This form is made 

 up to describe varieties of these two species only. Varieties of the 

 other species of Triticum are not extensively enough known or culti- 

 vated in this country to warrant the expansion of this form to include 

 their description. 



The adjectives used on this form are grouped under the following- 

 heads: 1, Young stool; 2, Half-grown plant; 3, Mature plant; 4, Head 

 (field notes); 5, Head (laboratory notes); 6, Awns; 7, Spikelet; 8, Grain; 

 9, Milling qualities; 10, General characteristics. 



Young stool. — The terms spreading, partly spreading, and erect 

 apply to the general form of growth of the young plant before the 

 appearance of the stem. In case of wheats planted in the autumn, 

 these observations should be made in the late autumn or very early 

 spring. 



The shades of color are comparative and difficult to describe accu- 

 rately and can be noted to the best advantage only when plats of grain 

 may be compared side by side. 



Half-grown plant.— By this is meant the stage of growth when the 

 head is just appearing from the sheath of the upper leaf; in other 

 words, just before flowering time. The shades of color are here again 

 difficult to describe and can be noted with any degree of accuracy only 

 when comparison between plats of grain is possible. 



The measurements of the leaf blade should be taken on the upper 

 leaf of each of at least ten average plants, when that many are avail- 

 able, the maximum measurement of each dimension of the leaf being 

 the one used in averaging. The terms erect, ascending, and drooping 

 apply to the upper leaf after the head is well out of the sheath, and 

 the terms smooth. scul>r<>,is, and downy apply to the surfaces of the leaf 

 blade and to the leaf sheath. The term glaucous is defined as ••cov- 

 ered with a bluish-white 1)100111" and refers to the surface of the young 

 leaves. 



The terms prominent and not prominent applied to the veins of the 

 leaf are difficult of accurate definition and should be considered only 

 when comparison of varieties is possible. 



The terms tapering and sides parallel applied to the end of the leaf 

 blade deal with the general shape of the distal one-third of the upper 

 leaf. 



The sheath is that portion of the leaf which clasps the stem, ami the 

 color terms here used are self-explanatory. 



