13ICLINIA AMENTACE^. Betula. 
621 
B. acuminata. Ehrh. heitr, 6. p. 98. 
B. lenia. Du Roi harlk, 1. p. 92. Wangh. amer. p, 45. 
/.29./ 38. 
Icon. Mich, arb. 2. p. 139* t. 2. Willd. arb. t. 2.f. 5. 
In barren rocky woods and old fields *. Canada to Pen- 
sylvania. . June, July. v. v. From thirty to forty 
feet high, ft is known by the name of White Birch 
or Oid Field Birch. 
2. B follis ovatis acutis serratis, petiolis pubescentibus pe- 
dunculo brevioribus, strobilorum squamis lobis latera- 
libus rotundatis. Willd. sp. pl, 4. p. 463. 
B, lutea. Mich. arb. 2. p 152. 
Icon< Mich. l. c. t. 5, Willd. arb. t. 2.f. 2. 
In low grounds : province of Maine, Hudson’s river. Tj . 
May, June. v. v. From seventy to eighty feet high 5 
generally called Yellow Birch. 
3. B. foliis rhombeo-ovatis duplicato-serratis acutis subtus 
pubescentibus, basi integris, amentis femineis ovatis, 
squamis villosis, laciniis linearibus aequalibus.— 
sp. pl. 4. p. 464. 
B. lanulosa. Mich.Ji. amer. 2. p. 181. 
B. rubra. Mich. arb. 2. p. 142. 
Icon. Mich. l. c. t. 3. Willd. arb. t. 2.f. 6. 
On the banks of rivers : New Jersey to Carolina. Tj . 
May. V. V. About seventy feet high when full, 
grown ; the wood very fine. It is generally called 
Red Birch. 
excelsa. 
nigra. 
4. B, foliis ovatis acuminatis duplicato-serratis, venis subtus papyracea* 
hirsutis, petiolo glabro, amentis femineis peduncula- 
tis nutantibus, squamis lobis lateralibus brevibus sub- 
orbiculatis. — Willd. sp.pl. 4. p. 464. 
B. papyrifera. Mich.Ji. amer. 2. p. 180. 
Icon. Mich. arb. 2. p. 133. t. 1. Willd. arb. t. 2.f, 1. 
In the forests of Canada to a great northern latitude, and 
as far south as the Hudson’s river, T? . 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. foliis cordato-ovatis argute serratis acuminatis, nervis lenia.» 
subtus petiolisque pilosis, strobilorum squamis glabris, 
lobis obtusis aequalibus elevato- venosis.^ — Willd. sp. 
pl. 4. 464. 
B.carpinifolia. Ehrh. beitr.6. p. gg. 
