234 THE WHEAT PLANT 



b. Ear flattened, 

 i. Awns white. 



A. Ear broad at base. 



(1) Spikelets narrow . . . var. abessinicum, Korn. 



(2) Spikelets wide . . . var. attenuatum, Korn. 



B. Ear broad at apex . . var. intermedium, Korn. 

 ii. Awns black var. nigrobarbatum, Korn. 



Glumes white, pubescent ; awns short. 



a. Ears flattened .... . var. vestitum, Korn. 



Glumes white, pubescent ; awns long. 



a. Ear cylindrical. 



i. Grain white ..... var. speltiforme, Korn. 



ii. Grain red ..... var. novissimum, Korn. 



b. Ears quadrate ....... var. villosum, Korn. 



c. Ears flattened. 



i. Grain white ..... var. Martinari, Korn. 



ii. Grain red ...... var. Halleri, Korn. 



Glumes pale red, glabrous ; awns long. 

 a. Ears cylindrical ...... var. rufescens, Korn. 



Glumes pale red, pubescent ; awns long. 



a. Ears cylindrical ..... var. rubrovelutinum, Korn. 



b. Ears quadrate. 



i. Awns pale red ...... var. Seringei, Korn. 



ii. Awns black ...... var. Vilmorini, Korn. 



Glumes black, pubescent ; awns short. 

 a. Ears cylindrical ...... var. anomalum, Korn. 



Glumes pale violet, pubescent. 

 a. Ears quadrate ...... var. uiolaceum, Korn. 



Glumes blue-black, pubescent. 

 a. Ears quadrate ...... var. nigrescens, Korn. 



A large number of varieties of T. polonicum have been described or figured ; 

 the majority of them are, however, not now in cultivation and do not appear to 

 have been grown except in Botanic Gardens. 



I have not been able to procure viable grain of any forms except those 

 belonging to the varieties levissimum, villosum, and Martinari, and a single 

 specimen of aristinigrum found among a sample of villosum ; the three first 

 mentioned appear to be the only varieties found at present in field culture. 



Seringe divided T. polonicum into four groups, viz. : 



1. T. polonicum quadratum, long, lax, square-eared forms. 



2. T. polonicum oblongum, forms with long, lax, somewhat cylindrical ears 

 with affinities near to T. durum. 



3. T. polonicum compactum, forms with ovate dense ears. 



4. T. polonicum deformatum, forms with deformed or branched ears with 

 short, poorly-developed grains. 



