Ludwigia 



Onagraceae 



701 



50 



Map 1475 



Ludwigia alternifolia L. 



50 



Map 1476 



Ludwigia glandulosa Walt. 



50 



Map 1477 



Ludwigia polycarpa Short & Peter 



1. Ludwigia palustris (L.) Ell. var. americana (DC.) Fern. & Grisc. 

 (Rhodora 37: 176-177. 1 pi. 1935.) (Ludwigia palustiis in part, of Gray, 

 Man., ed. 7 and Isnardia palustris in part, of Britton and Brown, Illus. 

 Flora, ed. 2.) Marsh Purslane. Map 1474. All Indiana reports for Lud- 

 ivigia palustris should be referred to this variety. Frequent to common 

 throughout the state, mostly in beds of ditches and small streams and on 

 the muddy borders of ponds, swamps, sloughs, lakes, and streams. Some- 

 times in mucky soil in marshes. 



N. S. to s. Que., Minn., and Oreg., southw. to Ga., La., Tex., e. Wash., 

 e. Oreg., ne. Calif to Mex. and Guatemala; also in Bermuda. 



2. Ludwigia alternifolia L. Map 1475. In wet places along streams, 

 about lakes, ponds, sloughs, and in wet woodland, fallow fields, and road- 

 side ditches. Throughout the state but usually only a specimen or two at 

 a place. 



Mass. to Fla. ; and in the interior from sw. Ont. to Kans. and Tex. 



3. Ludwigia glandulosa Walt. Map 1476. In swampy woods and dried- 

 up sloughs. Known only from Posey County. 



Gulf Coast from Fla. to Tex. ; up the Mississippi Valley to 111. and Ind. 



4. Ludwigia polycarpa Short & Peter. Map 1477. In the muddy borders 

 of ponds, sloughs, swamps, streams, lakes, and in dredged and roadside 

 ditches. No doubt to be found in every county of the state but infrequent 

 and rarely many specimens at a place. 



E. Mass., sw. Ont. to Minn., southw. to Tenn. and Kans. 



5. Ludwigia sphaerocarpa Ell. var. Deamii Fern. & Grisc. (Rhodora 37 : 

 174-175. 1935.) (Ludivigia sphaerocarpa in part, of Gray, Man., ed. 7 

 and of Britton and Brown, Illus. Flora, ed. 2.) Map 1478. Mucky or 

 muddy borders of marshes, streams, and interdunal flats. Rare. 



Plants growing in water often develop corky bases. 

 Nw. Ind. 



