1 66 THE WHEAT PLANT 



and olive-yellow, with a flinty endosperm. It measures from 6 to 7-5 mm. 

 long, 1-1-5 mm - f rom ^de to side, and 2-1-2-6 mm. from back to front. 

 The furrow is seen as a shallow groove along the narrow edge of the grain ; 

 the radicle of the embryo is prominent, the opposite end having a " brush " 



231 123 



FIG. 112. Empty glumes ( x 2) and grains (front, back, and 



side views) of T. aegilopoides (nat. size), 

 i, var. Larionowi. 2, var. boeoticum. 3, var. Thaoudar. 



of hairs. The weight of 100 caryopses varies from 

 i-o to 1-3 grams. 



T. aegilopoides may be subdivided into two sections 

 as indicated below : 



SECTION I. Young shoots and culms erect and caes- 

 pitose (" spring type ") ; young leaves broad (10-15 mm. 

 across), yellowish-green. 



1 . Flowering glume of the lowest flower of the spikelet 

 with a long awn (9-11 cm.), the second flowering glume 

 usually with a short point only (2-5 mm.), var. boeoticum. 



2. Flowering glumes of both flowers generally with 

 equally long awns (9-10 cm.) . . . var. Thaoudar. 



T. aegilopoides, var. boeoticum, mihi. 



T. boeoticum, Boiss. Diagn. ser. i. fasc. 13, p. 69 (1853). F IG - "3- 



This is the most widely distributed European variety Grains from the spike - 



of T. aegilopoides (i, Fig. 114), being frequent in parts of lets of , n e side of 



. o , D i f an ear of T. aegilo- 



soutnern berbia, Bulgaria, and Greece. It is found poides, var. boeoti- 



throughout Asia Minor and has been recorded by Larionow cum (nat. size). 

 from the Crimea, although from Vavilov's account (Bull. 

 App, Bot. vol. vi. p. 691) it is probable that the Crimean form should be placed 

 in Section II. with varieties Pancici and Larionowi, which are winter forms with 

 narrow leaves and prostrate young shoots. 



The young shoots of the forms obtained from M. Kornicke and grown at 

 Reading are erect, the leaves pale yellowish-green, pubescent, with long white 

 hairs sparsely distributed along the summit of the longitudinal ridges. 



