58 FLORA OF GRAND RAPIDS. 



QUERCUS L. Oak. 



467. Q. alba L. White Oak. 

 Uplands; common. May. 



40tf. Q. bi::olor Willd. Swamp White Oak. 

 Q. platiDioldts (Lam.) Sudw. 

 Low ground; common. Mid-ilay. 

 A large tree. 



409. Q. coccinea Wang. Scarlet Oak. 

 Sterile soil; not infrequent. Mid-May. 



470. Q. macrocarpa Michx. Bur Oak. Over- or Mossy-cup Oak. 

 Rich soil; frequent. Last of May. 



471. Q. Muhlenbergii Engelm. Yellow Oak. Chestnut-Oak. 

 Q. acuminata (Michx.) Sarg. 



Rich woods; occasional. Mid-May. 



472. Q. prinoides Willd. Dwarf Chestnut-Oak. 

 Dry sandy soil; infrequent. Mid-May. 



Hills about Lamberton Lake (O.IL); east bank of Grand River 

 at Grand Island; abundant along the road, east of Plainfield 

 Ave., one mile north of the Knapp Road. A shrub 2-4 feet high. 



473. Q. rubra L. Red Oak. 

 Sandy soil; common. Mid-May. 

 A large tree, 



474. 0. velutina Lam. (Q. tinctoria Bartram. Black Oak.) 

 Uplands; common. Last of May, 



The acorns are exceedingly variable in all our species. 



ULMACEAE. Elm Family. 

 CELTIS L. Nettle-tree. Hackberry. 



475. C. occidentalis L. Hackberry. Sugarberry. 

 Alluvial soil; frequent along Grand River. Mid-April. 



