DICLINIA AMENTACE^. Betula. 



621 



B. acuminata., Ehrh. heitr. 6. p. QS. 



B. lenta. Du Roi harlk. I. p. Q2. JFavgh. amer. p. 45. 



t.2g. /:;jS. 

 Icon. ^Mich. arb. 2. p. 139- /. 2. ll^illd. arh. t. 2.f. 5. 

 In barren rocky woods and old fields : Canada to Pen- 



sylvania. fj . June, July. v. v. From thirty to forty 



feet high. It is known by the name of IF/iite Birch 



or Old Field Birch. 



2. B. foliis ovatis acutis serratis, petiolis pubescentibus pe- 



dunculo brevioribus, strobilorum squamis lobis lalera- 



libus rotundatis. IFilld. sp. pi. 4. p. 463. 

 B. lutea. Mich. arb. 2. p 152. 

 Icon. Mich. I. c. t. 5. Willd. arh. 1. 1. f. 2. 

 In low grounds : province of Maine, Hudson's river. Pj . 



May, June. v. v. From seventy to eighty feet high ; 



generally called Yellow Birch. 



3. B. foliis rhombeo-ovatis dupUcato-serratis acutis subtus 



pubescentibus, basi inlegris, amentis femineis ovatis, 

 squamis villosis, laciniis linearibus aequalibus. — Willd. 

 sp. pi. 4. p. 464. 



B. lanulosa. Mich.fi. amer. 2. p. 181. 



B. rubra. Mich. arh. 2. p. 142. 



Icon. Mich. I. c.t.3. Willd, arb. t. 2./. Q. 



On the banks of rivers : New Jersey to Carolina, T^ . 

 May. V. V. About seventy feet high when full 

 grown ; the wood very fine. It is generally called 

 Red Birch. 



4. B. foliis ovatis acuminatis duplicato-serratis, venis subtus 



hirsutis, petiolo glabro, amentis feminei» peduncula- 

 tis nutantibus, squamis lobis lateralibus brevibus sub- 

 orbiculatis. — Willd. sp.pl. 4. p. 464. 



B. papyrifera. Mich.fi. amer. 2. p. !80. 



Icon. Mich. arb. 2. p. 133. t. 1. Willd. arb. t. 2./. 1. 



In the forests of Canada to a great northern latitude, and 

 as far south as the Hudson's river. V) . May, June. 

 V. V. A large tree, highly useful to the natives for 

 constructing their large portable canoes, from which 

 circumstance it is known by the name of Canoe Birch. 



'5. B. fjliis covdato- Ovatis argute serratis acuminatis, nervis 

 subtus petiolisque pilosis, strobilorum squamis glabris, 

 lobis obtusis aequalibus elevato-venosis. — Willd. sp. 

 pi. 4. 464. 

 B. carpinifolia. Ehrh, leitr. 6. p. 99. 



excelsa. 



papyracea. 



lenta. 



