HORDE 243 
A. Rachis articulate at maturity; grain entirely 
inclosed by the glumes, not falling out when 
threshed (however it is not grown to the 
glumes). 
B. Spikes loose, almost 4-sided when seen from 
above; glumes broadly truncate in front, 
with a very short, obtuse middle tooth, 
eamanely Reclets oi 9 oj Phd ot oa vies dees es 1. T. sativum 
BB. Spikes very dense, laterally compressed; [spelta Hack. 
glumes tapering, with an acute middle 
tooth; sharply keeled... =..........00.+. 2. T. sativum di- 
AA. Rachis not articulated at maturity; grain [coccwm Hack. 
visible between the somewhat open fruiting 
lemma and palea, easily falling out......... 3. T. sativum 
[tenax Hack. 
The third race, which includes the common wheats, he 
divides in four subraces: 
A. Glumes distinctly keeled only in the upper 
half, rounded or only slightly keeled in the 
lower half. 
B. Spikes long, more or less loose, somewhat 
dorsally conipressed soci. 2 ew es 1. T. sativum 
{vulgare Hack. 
BB. Spikes short, dense, distinctly 4-sided....... 2. T. sativum 
AA. Glumes sharply keeled at the base. [compactum Hack. 
B. Grain short, thick, not compressed, broadly 
DP UerELe RINSTOT. 6 Sec as Ooi ee Re ee es 3. T.sativum tur- 
BB. Grain oblong, narrower, somewhat laterally [gidwm Hack. 
compressed, and somewhat acuminate.....4. 7’. sativum 
[durum Hack. 
The first includes most of the common wheats, of 
which there are numerous varieties. The second includes 
the club wheats grown in the Palouse country of Wash- 
ington and the adjacent regions. The third includes 
English wheat, especially grown in Mediterranean coun- 
tries. The fourth includes the durum wheat, recently 
introduced and now successfully grown in the Great 
Plains region. (See Hackel in Engl. & Prantl, Pflanzen- 
fam. II. 2:80. 1887. True Grasses, 180. 1890.) 
K6rnicke’s classification is similar to that of Hackel, 
but he recognizes the races and subraces as species. 
(Kornicke, Handb. Getreidebaues, 1:40. 1885 ) 
