DICLINIA AMENTACE-®, Betuk. 
B. acuminata. Ehrh. heitr. 6. p. 98. 
B. lenta. Du Roi harlk, l.p. 92. Wangh, amer. p. 45. 
29./38. 
Icon. Mich. arb. 2. p. 139* 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. It is known by the name of White Birch 
or Old Field Birch, 
2. B. foiiis ovatis acutis serratis, petiolis pubescentibus pe- 
dmicuio brevioribus, strobilorum squamis lobis lalera- 
libus rotundatis. Willd. sp. pi. 4. p. 403. 
B. lulea. Mich, arb, 2. p, 152. 
Icon. Mich. 1. 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 j 
generally called Yellow Birch. 
3. B. foiiis rhombeo-ovatis duplicato-serratis acutis subtus 
pubescentibus, basi integris, amentis femineis ovatis, 
squamis viilosis, laciniis linearibus aequalibus. — Willd. 
sp. pi. 4. p. 404. 
B. lanulosa. Mich.Ji. amer. 2. p. 181. 
B. rubra. Mich. arb. 2. p. 142. 
Icon. Mich. 1. 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. 
021 
excelsa. 
nigra. 
4. B. foiiis ovatis acuminatis duplicato-serratis, venis subtus papyracea% 
hirsutis, petiolo glabro, amentis femineii peduncula- 
tis nutantibus, squamis lobis lateralibus brevibus sub- 
orbiculatis. — Willd. sp.pl. 4. p, 404. 
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. . 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. foiiis cordato- ovatis argute serratis acuminatis, nervis lenta» 
subtus petiolisque pilosis, strobilorum squamis glabris, 
lobis obtusis aequalibus elevato-venosis.— > sp. 
pi. 4. 404. 
B. carpinifolia. Ehrh, leitr, 6. p, 99. 
