FLOWERIXG PLANTS AND FERNS OF INDIANA. 883 



• 



A. variegata L. White Milkweed. 



In dry woods and thickets, never very abundant and confined 

 largely to the southern counties of the State. It prefers sandy or 

 gravelly soils, though occasionally found in clays. 



Flowering season short, covering June and July. 



Daviess (Clements); Monroe (MacDougal); Gibson and Posey 

 (Schneck); Noble (Van Gorder); Clark (Baird and Taylor); Vigo 

 (Blatchley); Jefferson and Marion. 



A. quabrifolia Jacq. Four-leaved Milkweed. 



A form of wide distribution, easily recognized by the middle 

 leaves being usually in whorls of four. It is found in thickets or 

 light woods usually in sandy or light, dry soil. 



Flowers from May until the latter part of July. 



Clark (Clapp); Jefferson (Barnes); Daviess (Clements); Dear- 

 born (Collins); Franklin (Meyncke); Gibson and Posey (Schneck); 

 Jay, Delaware, Eandolph and Wayne (Phinney); Noble (Van 

 Gorder); Putnam (MacDougal); Tippecanoe (Coulter); Floyd 

 (Clapp); Monroe and Vigo (Blatchley); Fayette (Hessler); De- 

 catur and Shelby (Ballard). 



A. Syriaca L. Common Milkweed. Silkweed. 

 (A. Cornuti Decaisne.) 



The most abundant member of the genus in the State, and of 

 general recognition. It grow r s in fields and waste places, usually 

 in rather dry soils, although at times found in good development 

 in the low, damp grounds adjoining lakes. 



Flowering from June through August. 



Tippecanoe (Coulter); Daviess (Clements); Jefferson (Barnes); 

 Putnam (MacDougal); Jay, Delaware, Ptandolph, and Wayne 

 (Phinney); Gibson and Posey (Schneck); Noble (Van Gorder); 

 Franklin (Meyncke); Clark (Baird and Taylor); Dearborn (Col- 

 lins); Decatur and Shelby (Ballard); Fayette (Hessler); Monroe 

 and Vigo (Blatchley); Flamilton (Wilson); Steuben (Bradner). 



A. perennis Walt. Thin-leaved Milkweed. 



Found in wet soils, chiefly the low bottom lands along streams 

 in a few southern counties. 



Flowers from May through summer. 



Owen (MacDougal); Gibson and Posey (Schneck); Clark (Baird 

 and Taylor); Jefferson (Coulter); Daviess (Clements). 



