AMERICAN HONEY PLANTS 



43 



BLUE GUM, see Eucalyptus. 

 BLUE LUPINE, see Lupine. 

 BLUET, see Centaurea. 



BLUE THISTLE (Eryngium articulatum). 



The blue thistle is listed by Richter as the source of a dark honey of 

 good flavor in California. He reports it from the Suisun Marshes, along 

 the Consumnes River and the Alvarado Marshes, blooming from August 

 to October 



BLUEVINE (Gonolobus laevis). 



This plant is also know^n as devil's shoestring, climbing milkweed, 

 sand vine, wild sweet potato vine and anglepod. It is a vine of luxuriant 



Fig. 26. Seed pods and leaves of the bluevine, or sandvine. 



growth, common on low lands from Virginia and Tennessee westward to 

 Missouri and south to Texas. It is common in Southern Ohio, Indiana 

 and Illinois, where it is a persistent and troublesome weed. It is espe- 

 cially troublesome in the corn fields, where it may be found climbing the 

 stalks. A single vine will run for many feet on fence wires or other sup- 

 port. It blooms freely through July and August, and is the source of large 

 quantities of surplus honey of good quality. The honey is light in color, 

 mild in flavor and does not granulate readily. S. H. Burton, of Washing- 

 ton, Indiana, reports a yield of 60 pounds per colony in three weeks and 

 an average of as high as 80 pounds per colony has been reported from 



