316 THE WHEAT PLANT 



Ear, 5-6 cm. long, square, 10-11 mm. across the face and side ; spikelets 

 20 ; D =40-45 ; awns divergent, 4-5 cm. long (Ear type i, Fig. 194). 



Empty glume, 7-8 mm. long, narrow ; apical tooth curved inwards, acute, 2-4 

 mm. long (4, 5, Fig. 191). 



Grain, flinty, plump ; furrow shallow ; 6 mm. long, 3-5 mm. broad, 3-1 mm. 

 thick. 



Ear bearded ; glumes blue-black, pubescent ; grain red. 



T. compactum, var. atrierinaceum, Korn. Arch.f. Biontologie, ii. 400 

 (1908). 



Ear, long, strongly awned. 



Like var. atrum (p. 319), this appears to have been derived from the crossing 

 of a velvet-glumed form of T. compactum with T. turgidum, var. iodurum. 



Ear beardless ; glumes white, glabrous ; grain white. 



T. compactum, var. Humboldtii, Korn. Syst. Uebers. Landw. Cer. 

 Poppelsd. 12 (1873). 



Kornicke first obtained this type from a Botanic Garden ; later he received 

 specimens from Chili and California. 



Flaksberger records its occurrence in the Western Caucasus. 



1. A common spring form in samples of Walla Walla wheat from the 

 United States. 



Young shoots, erect or semi-erect. 



Straw, of medium height, 96-104 cm. (38-41 inches) high, stout, striate, 

 hollow. 



Ear, 5-6 cm. long, side view somewhat oval, 10-12 mm. across the face, 

 15-20 mm. across the side ; spikelets 23-24 ; 13=46-50 (Ear type i, Fig. 198). 



Empty glume, 7-8 mm. long, apex narrowed ; apical tooth blunt, -5 mm. long 

 (12, 14, Fig. 191). 



Grain, semi-flinty, with prominent dorsal hump ; 6-6-2 mm. long, 3-25 mm. 

 broad, 3 mm. thick. 



2. A spring form from Chili with coarse glumes, glaucous ears of moderate 

 density, approximating to the " Squarehead " forms of T. vulgare. 



Young shoots, erect. 



Straw, of medium height, 104 cm. (30-40 inches) high, stout, hollow with 

 thickish walls. 



Ear, 5-7 cm. long, " clubbed," 10-12 mm. across the face, 15 mm. across 

 the side ; spikelets 18-22 ; = 33-36 (Ear type 2, Fig. 198). 



Empty glume, 8-9 mm. long, apex broad ; apical tooth blunt, -5-1 mm. long 

 (14, Fig. 191). 



Grain, flinty, 6-6-7 mm - l n g> 3'3 mm. broad, 3 mm. thick. 



3. Little Club. A common glaucous form grown extensively in the Pacific 

 Coast States of America. 



Young shoots, semi-erect. 



Straw, of medium height, 104 cm. (41 inches) high, hollow. 



