27 



J. Ligules 2 mm or more long; panicles pyramidal 

 to ellipsoid, 10-30 cm long, branches somewhat 



erect and stiffish P. palustris 



I. Margins of lemmas glabrous P. alsodes 



1. P. annua L. Annual Bluegrass 



Annual. Weed of disturbed sites. Common throughout N.H. 

 Introduced from Europe. 



2. P. compressa L. Canada Bluegrass 



Perennial. Planted in fields and pastures, becoming naturalized, 

 escaping to dry ledges and dry open woods. Common throughout N.H. 



3. P. pratensis L. Kentucky Bluegrass 



Perennial. Extensively planted in pastures and especially lawns, 

 becoming naturalized along roads, occasionally becoming established in 

 natural habitats. Throughout N.H.; common. 



Slender plants with narrow, involute leaves sometimes segregated as 

 P. angustifolia are included here. 



4. P. alpigena (Fries) Lindm. f. Alpine Bluegrass 



Perennial. Alpine zone of Mt. Washington, local and occasional. 

 Also reported from Mt. Clinton (Pease, 1964). 



This taxon is considered by some to be a race of P. pratensis 

 (Gleason, 1952). 



5. Poa trivialis L. (figure 24) 



Perennial. Open woods and wet places. Throughout the state; 

 occasional. 



6. P. saltuensis Fern. & Wieg. (figure 25) 



Perennial. Deciduous woods and stream banks. Frequent in 

 northern N.H., becoming rare southward. 



Plants with smaller spikelets treated by Fernald (1950) as var. 

 microlepis Fern. & Wieg. do not separate out as a distinct taxon. 



7. P. alsodes A. Gray (figure 26) 



Perennial. Deciduous woods and stream banks. Frequent in 

 northern N.H., becoming rare southward. 



8. P. nemoralis L. (figure 27) 



Perennial. Mostly open sites, roadsides and meadows. Northern 

 N.H.; infrequent. Introduced from Europe. May be confused with P. 

 palustris or P. glauca. 



9. P. palustris L. (figure 28) 



Perennial. Mostly wet sites of open woods, riverbanks, meadows 

 and roadsides. Throughout N.H.; frequent. 



10. P. glauca Vahl (figure 29) 



Perennial. Open moist to dry areas, mostly alpine. Northern N.H.; 

 frequent in Presidential Range, rare elsewhere. 



11. P. fernaldiana Nannf. (figure 30) 



Perennial. Mostly alpine areas. Northern N.H.; frequent in Presi- 

 dential and Franconia Ranges, rare elsewhere. 



