DICLINIA AMENTACE®, Betula. 
B. acuminata. Ehrh. beitr. 6. p. 98. ` 
B. lenta. Du Hoi harbk. 1. p. 92. Wangh. amer. p. 45. 
t. 29. f.38. 
“Icon. Mich. arb. 2. p: 129. t.2, Willd: arb, t. 2. f. 5. 
. In barren rocky woods and old fields: Canada to Pen- 
sylvania. h. June, July. v.v. From thirty to forty - 
feet high. It is known by the name of White Birch 
or O/d Field Birch. Fus i 
2. B. foliis 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. b. 
May, June. v. v. From seventy to eighty feet high ; 
generally called Yellow Birch. : 
. 8, B. foliis rhombeo-ovatis duplicato-serratis acutis subtus 
"pubescentibus, basi integris, amentis femineis ovatis, 
squamis villosis, laciniis linearibus aequalibus. — Willd, 
sp. pl. 4. p. 464. 
B. lanulosa. Mich. fl. amer. 2. p. 181. 
B. rubra. Mich. arb, 2. p. 142. 
Icon. Mich. l.c. 1.3. Willd. arb. t. 2. f. 6. 
On the banks of rivers: New Jersey to Carolina. - h. 
May. v. v. About eed - high a full 
grown; the wood very fine. It is generally called 
4. B. foliis ovatis acuminatis duplicato-serratis, venis subtus 
hirsutis, petiolo glabro, amentis femineis peduncula- 
tis nutantibus, squamis lobis lateralibus brevibus sub- 
orbiculatis.— Willd. sp. pl. 4. p. A64. 
B. papyrifera. Mich. fl. 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. h. 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 
subtus petiolisque pilosis, strobilorum squamis glabris, 
lobis obtusis zqualibus elevato-venosis,— Willd. sp. 
pl. 4. 464. = 
B. carpinifolia, Ehrh, beitr, 6. p. 99. 
excelsa. 
nigra. 
- 
papyracea, 
lenta, 
