WHEAT. 229 



Regarding the number and classification of the races of 

 wheats, PercivaP has concluded as follows : — 



SPECIES I.— T. aegilopoidea, Bal. 



RACE I. — T. monococcum, L. 

 II. — T. dicoccoides, Korn 

 11. — T dicoccum, Schubl 

 III. — T. orientale, mihi . . 

 IV.— T. durum, Desf. . . 

 V. — T. polonicum, L. . . 

 VI.— T. turgidum, L. 

 VII. — ^T. pyramidale, miJu 

 VIII.— T. vulgare. Host . . 

 IX. — T. compactum. Host 

 X. — T. sphaerococcum, mihi 

 XI.— T. Spelta, L. 



Wild SmaU Spelt. 



Small Spelt. 



Wild Emmer. 



Emmer. 



Khorasan Wheat. 



Macaroni Wheat. 



Pohsh Wheat. 



Rivet or Cone Wheat. 



Egyptian Cone Wheat. 



Bread Wheat. 



Club Wheat. 



Indian Wharf Wheat. 



Large Spelt or Dinkel. 



Diagnostic Characters of the Species and Races 

 OF Wheats. 



Species 1. — Triticum csgilopoides , Bal. Wild Small Spelt. 

 Coleoptile, 2-nerved. 



Young shoots, erect or prostrate, young leaves blue-green 

 or yellow-green more or less hairy, with a line of long hairs on 

 the summit of the longitudinal ridges. 



Straw, slender, nodes clothed with white deflexed hairs. 



Ear, bearded compressed, very narrow across the face, 

 broad across the 2-rowed profile; Spikelets l-(or 2) grained; 

 terminal spikelet minute and abortive ; rachis very fragile and 

 fringed along the margin with long straight hairs. 



Empty glume, long, narrow, keeled to the base with 

 stout, acute apical tooth often turned slightly outwards ; on the 

 outer face a prominent nerve ending in a distinct secondary 

 tooth, some distance from the base of the aspical tooth. 



Palea, in ripe ears divided longitudinally into two halves. 



Grain, small, rice-like, flinty, pointed at both ends, com- 

 pressed from side to side, gurrow indistinct, tip with few 

 hairs. 



Race 1. — Triticum monococcum, L. Small Spelt; Ein- 

 koorn : Engrain. 



Coleoptile 2-nerved. 



Young shoots, erect or semi-erect, young leaves yellowish- 

 green, with very short hairs or scabrid projections on the 

 longitudinal ridges. 



