382 MINNESOTA BOTANICAL STUDIES. 
Betula pumila L. Mant. 124. 1767. 
Colles) Wheeler 272, Crooked’ Creek.” June: 
Local along Crooked creek, forming large thickets in wet 
meadows. 
Alnus incana (L.) WiLLp. Sp. Pl. 4: 335. 1805. 
Coll.: Wheeler 617, Brownsville. Aug. 
Local at mouth of Wild Cat creek. 
FAGACEZ. 
Quercus rubra L. Sp. Pl. 996. 1753. 
Coll’: Wheeler 640, 641, Jefferson.) Aug. 
Common throughout. 
Quercus coccinea Wane. Amer. 44. Dl. 4. f. 9. 1787. 
Coll.: Wheeler 644, 645, Jefferson. Aug. 
Common throughout. 
Quercus velutina Lam. Encycl. 1: 721. 1783. 
Coll. : Wheeler 642, 643, Jefferson. Aug. 
Prof. Sargent writes about 643: ‘* Collection 643, which I 
call Q. velutina, differs from that species as it usually 
occurs by the much smaller less tomentose buds; the 
acorns, however, are clearly from 2. velutina. I fre- 
quently have seen specimens of this same form from the 
region immediately west of the Great Lakes. It appears 
sometimes as if it might be a hybrid between Q. velutina 
and 2. coccinea but its occurrence is too frequent and its 
distribution too wide to admit of this supposition. With 
the present state of our knowledge I can but refer it to Q. 
velutina.” 
2. velutina does not seem to be nearly so common in this 
region as Q. coccinea. 
Quercus alba L. Sp. Pl. 996. 1753. 
Coll.: Wheeler 638, Jefferson. Aug. 
Common on ridges of bluffs throughout. 
Quercus macrocarpa Micux. Hist. Chen. Am. 2. A/. 23. 1801. 
Coll.: Wheeler 639, Jefferson. Aug. 
Common throughout. 
Quercus platanoides (Lam.) Supw. Rep. Secy. Agric. 1892: 
227. “1003: 
Coll.: Wheeler 366, Crooked Creek; 456, 538, 654, 
Jefferson. July, Aug. 
