Asclepias 



ASCLEPIADACEAE 



769 



~ M) 



Map 1654 



Asclepias phytolaccoides Pursh 



10. Asclepias phytolaccoides Pursh. (Asclepias exaltata (L.) Muhl. of 

 Britton and Brown, Illus. Flora, ed. 2.) Poke Milkweed. Map 1654. This 

 is strictly a woodland species and is more or less infrequent, and associated 

 for the most part with white oak. Ordinarily only a single plant or two 

 are found at a place. 



Maine to Minn., southw. to Ga. and Ark. 



11. Asclepias syriaca L. Common Milkweed. Map 1655. Frequent to 

 common in all parts of the state. Less frequent in the less calcareous soils. 

 Usually in moist soil along roadsides and railroads, often common in 

 cultivated fields, especially oatfields, and in fallow fields and open wood- 

 land. 



This species is variable as to width and shape of the leaves and the 

 density and length of the tubercles on the follicles. 

 N. B. to Sask., southw. to Fla., Tex., and Ariz. 



12. Asclepias purpurascens L. Purple Milkweed. Map 1656. Infre- 

 quent throughout the state. Usually only one or a few plants are found 

 together. It has various habitats. The most common one is a rather dry, 

 and usually somewhat sandy soil in open woodland and along roadsides. 

 Also found in damp, open woodland about swamps and lakes and even in 

 tamarack bogs. 



N. H. to N. C, westw. to Minn, and Ark. 



6812. AMPfiLAMUS Raf. 



1. Ampelamus albidus (Nutt.) Britt. (Bull. Torrey Bot. Club 21: 314. 

 1894.) (Gonolobus laevis Michx.) Bluevine. Map 1657. Mostly on the 

 banks and alluvial plains of streams and in cultivated fields in southern 

 Indiana. It is an obnoxious weed in corn and cultivated fields in the "bot- 

 toms." In 1938 County Agent Mervin F. Smith found it well established 

 in a cornfield a mile south of Uniondale, Wells County. As a weed it is 

 as difficult to eradicate as our common bindweed. The beekeepers widely 



