70 IIORTUS GRAMINKUS WO 15 U R N ENSIS. 



AGROPYRUM rigidum, per. rigid, nat. Bohemia, 

 var. o. scabria, per. rough-husked, 

 var. j3. hcvibus, per. smooth-husked, 

 var. 7. pilosus, per. pilose-leaved, 

 var. 8. subenervibiis, per. plain-husked. 

 glaucum, per. glaucous, nat. Germany. 



obtusijlorum, per. nat. ? 



pungens, per. 



densijiorum, per. dense-flowered, nat. Siberia, 



giganteum, per. gigantic. 



repens, per. couch-grass. 



Varieties of Couch grass, 

 a. subulat-um, per. awl-husked. 

 j3. dumelorum, per. Wood. 

 7. Vaillantianum, per. short-awned. 

 S. Leersianmn, per. two or three spiculed. 

 i. capillare, per. hair-awned. 

 I], imbricatum, pjer. imbricated. 

 Sibiricum, per. Siberian. 

 caninum. 



vaginalis, per. sheathing, nat. S. America. 

 distichum, per. two-rowed, nat. C. G. Hope. 

 prosiratum, per. prostrate, nat. arid deserts, Africa. 

 Orieniak, ami. Eastern, nat. Eastern Archipelago. 

 imbricatum, per. imbricated^ nat. Caucasus. 

 cristatum, per. crested. 



scabrum, per. rough, nat. Van Diemen's Land. 

 pectinatum, per. comb-like, nat. Van Diemen. 



variegatum, per. variegated, nat. ? 



* Doubtful species, 

 filiforme, per. slender. 

 bicorne, ann. two-horned, husked, nat. Egypt. 



bijlorum, ann. two-flowered, nat. ? 



subulatum, ann. awl-husked, nat. Aleppo. 

 Peruvianum, per. 

 TRITICUM. Wheat-grass. Generic character : ca/j/x, a 

 common receptacle elongated into a spike, husks two 

 valves, many-flowered; corolla two-valved, spear-shaped, 



