382 MINNESOTA BOTANICAL STUDIES. 



Betula pumila L. Mant. 124. 1767. 



Coll. ; Wheeler 272, Crooked Creek. June. 

 Local along Crooked creek, forming large thickets in wet 

 meadows. 

 Alnus incana (L.) WiLLD. Sp. PL 4: 335. 1805. 

 Coll. : Wheeler 617, Brownsville. , Aug. 

 Local at mouth of Wild Cat creek. 



FAGACE^. 

 Quercus rubra L. Sp. PI. 996. 1753. 



Coll. : Wheeler 640, 641, Jefferson. Aug. 

 Common throughout. 

 Quercus coccinea Wang. Amer. 44. -pi. 4.. f. g. 1787. 

 Coll. : Wheeler 644, 645, Jefferson. Aug. 

 Common throughout. 

 Quercus velutina Lam. Enc}-cl. i: 721. 1783. 

 Coll. : Wheeler 642, 643, Jefferson. Aug. 

 Prof. Sargent writes about 643 : " Collection 643, which I 

 call ^. velutina, differs from that species as it usually 

 occurs by the much smaller less tomentose buds ; the 

 acorns, however, are clearly from J^. 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 ^. velutina 

 and ^ 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 ^. 

 velutina." 

 o^. velutina does not seem to be nearly so common in this 

 region as ^ coccinea. 



Quercus alba L. Sp. PL 996. 1753. 



Coll. : Wheeler 638, Jefferson. Aug. 

 Common on ridges of bluffs throughout. 



Quercus macrocarpa Michx. Hist. Chen. Am. 2. //. 2j. 1801. 

 Coll. : Wheeler 639, Jefferson. Aug. 

 Common throughout. 



Quercus platanoides (Lam.) Sudw. Rep. Secy. Agric. 1892 : 

 327. 1893. 

 Coll.: Wheeler 366, Crooked Creek; 456, 538, 654, 

 Jefferson. Jul}^, Aug. 



