628 



GI-EANINGS IN BEE CULTURE 



Glaucous or ]nissy willow. Stauiiiiate 

 and pistillate and catkins. Salix discolor 

 Muhl. Photographed by John H. Lovell, 

 Waldoboro, Me. 



Rivt'r-bank willow, S. longifoUa Muhl. 

 Staminate and pistillate catkins. Very 

 common, following the pussy willow; valu- 

 able for both pollen and nectar. Photo- 

 graphed by John H. Lovell. 



While willow, iSalir (dlia Jj. Slatii'tnah- Kock or sugar maple, Acer saccliarurii 



catkins. Common trees visited by bees in Marsh. Photographed by John H. Lovell. 

 great numbers. Photographed by John H. 

 Lovell. 



