192 Bulletin 187 



A. rug'osa (Du Roi) Spreug. (A. serrulata Willd.). Smooth Alder. 

 Moist soil of the lower altitudes; frequent. 



A, rug'osa x incaiia. Burlington, (Jones and Eggleston). 



BETULA. Birch 



B. allm L. Paper, Canoe or White Birch. Mt. Mansfield, ( Hlake). 



B. all>a L., var. cordifolia (Kegel) Fernald. Rocky mountain slopes; 



occasional. 

 B, alba L., var. minor (Tuckerm.) Fernald. One tree, Fairfield Pond, 



(Blake). 

 B. alba L., var. papyrifera (Marsh.) Spach. (B. papyrifera Marsh.). 



Woodlands; common. 

 B. lenta L. Cherry, Sweet or Black Birch. Rich woodlands of the 



lower altitudes; frequent in western Vermont and known in the 



Connecticut Valley as far north as Hanover, N. H. Willoughby 



Lake, (Kennedy). 

 B. lutea Michx. f. Yellow or Gray Birch. Rich cool soils; frequent, 



especially on mountain sides. 

 B. ]>eiHlula Roth. (B. caerulea Blanchard). White or Canoe Birch. 



Stratton, Windham, Worcester and Elmore, (W. H. Blanchard). 



B. populifolia Marsh. White, Gray or Old Field Birch. Frequent in 



the Champlain Valley. Occurs in every town in Windham County, 

 in Stratton up to 2,000 feet altitude, (W. H. Blanchard); Leming- 

 ton, Essex County, (Eggleston). 



CARPINUS. Hornbeam. Ironwood 



C. caroliuiana Walt. American Hornbeam, Blue or Water Beech. 



Near streams of the lower altitudes; frequent. 



CORYLUS. Hazelnut. Filbert 



C. amerleana Walt. Hazelnut. Thickets of the lower altitudes; occa- 

 sional. Known in Connecticut Valley as far north as Hartford, 

 (Jesup). 



1'. rostrata Ait. Beaked Hazelnut. Dry thickets; common. 



OSTRYA. Hop Hornbeam. Ironwood 



0. yirgiiiiaiia (Mill.) K. Koch. American Hop Hornbeam, Leverwood. 

 Rich woods; common. 



FAGACEAE. BEECH FAMILY 



CASTANEA. Chestnut 



('. (Ii'iitata (Marsh.) Borkh. Frequent in lower Connecticut Valley and 

 ill scjuthwestern Vermont. In Connecticut Valley not known in 

 native habitat much north of Bellows Falls. Small groves occur 

 at West Rutland, (Eggleston), and at Leicester, (Dutton) ; and a 

 few trees at Burlington, (Jones) ; at Colchester, (Griffin) ; and at 

 Stowe, (Mrs. Carrie E. Straw). 



