132 THE GENERA AND THEIR SPECIES. 



Varieties — 



P. angusti folia. Panicle loose, stem slender, uppermost 



node near to panicle. 

 P. coarctata. Panicle close, stem rigid. 



P. glaucantha. Glaucous. 



P. parnelli. Nodes five or six, uppermost below half- 



way ; ligule very broad and short. 



P. balfouvii. Nodes three ; uppermost two-thirds of the 



way down ; ligule prominent and blunt. 



P. glauca. Uppermost node near base of stem ; 



glaucous. 



A hardy, slender, graceful grass of the woods and shady 

 places, but thriving anywhere when sown. No species does 

 better on land shaded by trees, and none is better for parks 

 and lawns. 



91. P. laxa. Scottish mountains, an Arctic, or rather 

 Sub-Arctic, species. July and August. Root perennial, fibrous, 

 tufted, slightly creeping. Stem round, slender, smooth ; nodes 

 two, the upper generally hidden. Leaves folded in bud, flat, 

 lanceolate, hooded at apex, roughish above and on edges, ribless 

 with median lines, glaucous. Sheaths round, smooth, almost 

 entire, uppermost longer than leaf ; ligule long and pointed. 

 Panicle drooping, angular, branches few. Spikelets ovate, 

 webbed, florets two or more. Glumes equal, ovate, pointed, 

 webbed. Outer palea with three ribs, hairy below ; inner palea 

 short, edges ribbed with green. 



Varieties — 

 P. stricta. 

 P. flexuosa 



Leaves flat at apex. 



Panicle branches wavy, often viviparous. 



92. P. alpina. Mountains of Scotland and West of 

 Ireland, ranging through similar districts in the Northern 

 Hemisphere. July and August. Root perennial, compactly 



