CLASSIFICATION OF AMERICAN WHEAT VARIETIES. 51 
hollow, but occasionally is pithy within, and varies in strength and 
height. The blades of the leaves are usually narrower than those of 
the durum and poulard wheats. The kernels may be either soft or 
hard. 
The greatest economic characteristic of common wheat is its well- 
known quality for bread making, as it excels all the other divisions 
in this important factor. It is also the best known and most widely 
cultivated of all the divisions and comprises more than four-fifths 
of the total number of varieties grown in the United States. More 
than 180 are distinguished by the following key. The varieties are 
most ne-arly related to the club wheats (Triticum comp actum) , but 
this separation of Host (119) is here used principally because of the 
greater density of the spike. 
Common wheat is widely adapted to varying climatic conditions 
and possesses more diverse characteristics than any of the other 
divisions. The cultivated varieties are distinguished by the accom- 
panying key. 
KEY TO THE VARIETIES OF COMMON WHEAT. 
la. Spike A\rNLESs. 
2a. Glumes Glabrous. 
3a. Glumes White 
4a. Kernels White ( Triticum vulgare albidum Al.), 
Kernels Short to Midlong. 
Kernels Soft to Semihard. 
Winter Habit. 
Spike fusiform. Page. 
Plant midtall; spike dense, erect Winter Bluestem 58 
Plant tall; spike lax, nodding Martin 58 
Spike oblong. 
Spike erect. 
Keel straight above. 
Shoulders narrow, oblique to 
square Prohibition 59 
Shoulders wide, square to ele- 
vated Greeson 60 
Keel incurved above. 
Spike blunt at apex White Winter 60 
Spike tapering at apex Challenge 60 
Spike sometimes slightly cla- 
vate Eaton 61 
Spike inclined to nodding White Wonder 61 
Spike clavate Satisfaction 61 
Spring Habit. 
Spike fusiform 
Plant early, short. 
Apical awns wanting Early Defla.nce 62 
Apical awns several, 2-15 mm. long. Colorado No. 50 62 
Plant midseason, midtall. 
Apical awns wanting TousE 62 
Apical awns few, straight Defiance 63 
Apical awns many, incurved Rink 64 
Spike oblong. 
Plant early, midtall Bunyip 64 
Plant m dseason, tall. 
Glumes yellowish Pacific Bluestem 65 
Glumes bronze Mexican Bluestem 66 
