16 FLORA OF VERMONT 



P. COMPRESSA, I;. English Blue-grass. Dry fields and woodlands ; com- 

 mon. 



P. debilis, Torr. Dr}^ rocky woodlands ; frequent. 



P. flava, L.- (P. serotina, Ehrh.) Fowl Meadow-grass. Wet soil; com- 

 mon. The form known in Europe as P. fertilis, Reich, also occurs at 

 Burlington, Jones, probably introduced. 



P. laxa, Haenke. Summit of Mt. Mansfield, Robbins. 



P. nemoralis, L. Rocky woodlands and mountain cliffs ; occasional and 

 variable. A form, var. strictior, Gray, from the islands and headlands 

 of Lake Champlain is of erect habit, and approaches P. caesia, Smith. 



P. pratensis, L. Kentucky Blue-grass. Pastures and fields ; common. 



P. pratensis, L. var. angustifolia, Smith. Groton Pond, Bates ; bog, Lake Wil- 

 loughby, Jones. 



SPARTINA 



S. cynosuroides, Willd. " Bellows Falls," Carey. Shoresof Lake Champlain 

 and tributaries ; frequent. 



SPOROBOLUS 



S. aspcr, Kunth. Thompson's Point, Pringle. 



S. serotinus, Gray. Wet soil ; Ripton, Boijce ; Bakersfield, Pringle; Peach- 

 am, Blanchard; frequent in elevated bogs of Windham county, Grout. 



S. vaginaefloros, Wood. Dry soil ; occasional and^variable. The commoner 

 forms represent S. negkctus, Nash. Plants found at Burlington, Jones, 

 correspond to S. minor, Vasey. Professor Scribner has examined these, 

 however, and decides that all are included in*Wood's species. 



TRISETUM 



T. subspicatum, Beauv. (T. subspicatum, Beanv. var. molle. Gray.) Dry 

 woods and ledges ; occasional. 



ZIZANIA 



Z. aquatica, L. Marshy borders of Lake Champlain and its tributaries ; 

 occasional. 



