CONTENTS 



Page. 



I. The Germination, Growing, Handling, and Adulteration of Blue- 



GKASS Seeds. By Edgar Brown 9 



Description of commercial and hand-gathered seeds 9 



Grades and quahty of commercial seeds 10 



Adulteration 10 



Weight per bushel 11 



Germination 12 



Growing and handling 12 



Pta pratensis ( Kentucky bluegrass) 12 



Poa compressa (Canada bluegrass) 13 



Poa trivialis (rough-stalked meadow grass) 13 



Poa nemoralis ( wood meadow grass) 13 



Poa triflora (fowl meadow grass) 13 



Poa arachnifera ( Texas bluegrass ) 14 



Poa annua (annual bluegrass) 14 



Poa alpina (alpine meadow grass) 14 



Poa sndetica 14 



II. Descriptions of the Seeds of the Commercial Bluegrasses a^t> Their 



Impurities. By F. H. Hillman 15 



The bluegrasses 15 



Key to the seeds of the more common species of Poa as found 



on herbarium specimens 18 



Key to commercial bluegrass seeds after preparation for market. . 19 

 Comparison of the principal distinguishing characters of blue- 

 grass seeds 20 



Descriptions of species 22 



Poa pratensis L., Kentucky bluegrass, June grass 22 



Poa compressa L., Canada bluegrass, flat-stemmed bluegrass. . 24 



Poa trivialis L. , rough-stalked meadow grass 24 



Port nemoralis L. , wood meadow grass 26 



Poa triflora Ehrh. (P. flava L., P. serotina VAivh.), fowl 



meadow grass, false redtop 27 



Poa arachnifera Torr. , Texas bluegrass 28 



Poa annua L. , annual meadow grass 29 



Poa alpina L. , aljiine meadow grass 29 



Poa sudetica Haenke 30 



Panicularia spp 31 



Panicularia nervata ( Willd. ) Kuntze, nerved manna grass, 



sometimes called fowl meadow grass 31 



Panicularia americana (Torr. ) MacM. , reed meadow grass, 



water meadow grass, tall manna grass 31 



5 



