IN EXTRA-TROPICAL COUNTRIES. 261 



Poa nemoralis, Linne. 



Europe, North and Middle Asia, North America. This perennial 

 grass can be grown on shady forest land, as the name implies, but 

 it accommodates itself also to open places, and will grow even 

 among rocks. It endures Alpine winters. According to Lawson 

 no better grass exists for displacing weeds on pleasure lawns ; the 

 same may be said of Poa compressa, L. 



Poa nervata, Willdenow. 



Southern North America, called in Alabama the Manna Grass. 

 Perennial. Valuable for pastures in low forest land. (C. Mohr.) 



Poa pectinacea, Michaux. (Eragrostis pectinacea, Gray.) 



Middle and Southern States of North America. This perennial 

 grass spreads readily over dry ground and even on coast sands. C. 

 Mohr regards it as valuable for pastures, and mentions as such 

 also Eragrostis nitida (Chapman), and E. tennis (Gray). 



Poa pratensis, Linne.* 



The ordinary English Meadow Grass. A perennial species, fit for 

 any meadows, thriving early, and able to live also in Alpine 

 localities. Better adapted for pasture than hay. It is suitable for 

 moor land, when such is laid dry ; although it shoots only once in 

 the season into flower, yet it forms a nutritious fodder, even on 

 comparatively poor soil. It resists drought. It forms excellent 

 sward, and with advantage can be used for intermixing it with 

 other pasture grasses. In the United States it is known as the 

 Kentucky Blue Grass or Pennsylvania Green Grass, and is con- 

 sidered one of the best for lawns, by Professor Meehan, as it will 

 crowd out all weeds in time. 



Poa trivialis, Linne.* 



Europe, North Africa, Middle and Northern Asia. Also a good 

 perennial grass for mixture on pasture land. One of the best 

 grasses for sowing on ground recently laid dry. Recommendable 

 also as a lawn grass. Sinclair regarded the produce of this Poa as 

 superior to many other kinds, and noticed the marked partiality 

 which horses, oxen, and sheep evince towards it. To thrive well it 

 wants rather moist and rich soil and sheltered places. It is a later 

 grass than P. pratensis ; it is well adapted for hay, and gives good 

 after-growth (Langethal). 



These few species of Poa have been singled out as recommendable, 

 because they are well tested. Future experiments beyond Europe 

 will add others to lists of recommendations like this. 



