154 THE WHEAT PLANT 



SPECIES II. T. dicoccoides, Korn. . . Wild Emmer. 



RACE II. T. dicoccum, Schxibl. . Emmer. 



III. T. orientale, mihi . . Khorasan Wheat. 



IV. T. durum, Desf. . . Macaroni Wheat. 

 V. T. polonicum, L. . . Polish Wheat. 



VI. T. turgidum, L. . . Rivet or Cone Wheat. 



VII. T. pyramidale, mihi . . Egyptian Cone Wheat. 



VIII. T. vulgare, Host . . Bread Wheat. 



IX. T. compactum, Host . . Club Wheat. 



X. T. sphaerococcum, mihi . Indian Dwarf Wheat. 



XI. T. Spelta, L. . . . Large Spelt or Dinkel. 



DIAGNOSTIC CHARACTERS OF THE SPECIES AND RACES OF WHEATS 



SPECIES I. Triticum aegilopoides, 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 

 vidges. 



Straw, slender ; nodes clothed with white deflexed hairs. 



Ear, bearded, compressed, very narrow across the face, broad across the 2- 

 rowed profile ; spikelets i- (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 apical tooth. 



Palea, in ripe ears divided longitudinally into two halves. 



Grain, small, rice-like, flinty, pointed at both ends, compressed from side to 

 side, furrow indistinct ; tip with few hairs. 



RACE I. Triticum monococcum, L. Small Spelt : Einkorn : 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. 



Straw, slender ; nodes clothed with deflexed hairs. 



Ear, bearded, compressed, much narrower across the face than the 2-rowed 

 profile; spikelets i- (or 2-) grained; terminal spikelet minute and abortive; 

 rachis fragile, glabrous or edges fringed with short hairs. 



Empty glume, long, narrow, keeled to the base with a stout, acute, apical 

 tooth, straight or turned slightly inwards ; the prominent nerve on the outer 

 half ends in a distinct secondary tooth some distance from the apical tooth. 



Palea, divided longitudinally to the base when the ear is ripe. 



Grain, as in T. aegilopoides, but shorter. 



SPECIES II. Triticum dicoccoides, Korn. Wild Emmer. 

 Coleoptile, usually 4-nerved. 



