HOWARt) 7 



been adopted. This scheme was based on the sub-division of Tritiviun 

 sativum Lam. into six sub-species and on the botanical varieties i)ioposed 

 by Koernicke.^ 



Triticum sativum Lam. Ears with a fertile tormina] spikek^t and brittle 

 or tough rachis. Outer glumes shorter than the flowering glumes, with or 

 without a blunt tOv)th at the side. Pales as long as the flowering glumes, 

 undivided. 



I. Rachis bkittle. Grain enclosed in the glumes when 



THRESHED. 



L Triticum spella L. Spelt. Ears bearded oi beardless, long and 

 ihin, lax and somewhat square. Outer glumes very broad 

 and truncated with a very short and blunt ajDex and a some- 

 what undeveloped keel. 



2. Triticum dicoccum Schrk. Emmer. Eais nearly alwavs bearded, 



dense, broader on the two-rowed side, outer glumes sharply 

 keeled with an acute apex. 



IL Rachls tough. Grains separating from the chaff when 



THRESHED. 



3. Triticum compactum Host. Dwaii wheats. Ear.-; bearded or 



beardless, extremely short and very compact, more or less 

 quadrangular. Outer glumes keeled above, rounded below. 

 Straw very short and stilt". Grains rounded. 



4. Triticum furyidum L. Rivet wdieats. Ears bearded, large and 



four-sided with the spikelets closely packed on the lachis. 

 Straw very tall, stiff, often solid. Grains large, short, and 

 plump with a blunt apex. 



5. Triticum durum Desf. Macaj-oni wheats. Ears large, dense 



with long awns. Outer glumes sharply keeled to the base. 

 Straw stiff, usually solid. Grains long, somewhat pointed 

 and hard. 



6. Triticum rulgare Vill. Common wheats. Ears beaided or beard- 



less, more or less lax (much laxer than T. compactum). Outer 



' Koeniicke, Die Arten und Vurittdten des Ottrtidts, Berlin, 1885. 



