528 



BOTANY 



PART II 



(Fig. 525). Wheat, Triticum. Spikelets single, with two or more flowers ; glumes 

 broadly ovate. KOERNICKE distinguishes as spccirs <>t' Wheat, 1. Tr. vulgare, with 

 a number of sub-species; 2. Tr. polonicum : 3. Tr. innnococctini. Rye, Secale 



FIG. 525. Cereals. A, Rye, Secalfcftfulf : I',, .S]H-k. Triticmii s^'lti, ; r. T \vn-i ankf! Barli-v, 

 Hordeum vulgare, tlixtii-hinn ; 1>. \Vlit-at. Ti-itiriim m/iim-i: 



ccrcale ; Spikelets single, 2-flowert'il ; glumes acute. Barley,- I/of/' nm. nilgare; 

 Spikelets one-Howered, in groiijis of three ; in the Mib-species H. hcxastichum 

 and H. letrastichuin all the rows of spikelets are fertile, in //. 'Hxt!<-hum only the 

 middle row. Oat, Avena saliva. Maize, Zea mais. The above are all cultivated 

 in temperate climates, the Maize, largely in America, the others also in Western 



