Desmodium 



Leguminosae 



609 



50 



Map 1247 



Desmodium laevigatum (Nutt.) DC. 



50 



Map 1248 



Desmodium Dillenii Darl. 



50 



Map 1249 



Desmodium vindiflorum (L.) Beck 



usually found on high ground in open places in oak woodland and in clear- 

 ings and sometimes in low oak woodland, but usually in flats. 



Forms of this species with very narrow leaves so closely approach 

 Desmodium paniculatum var. pubens that it is difficult to decide to which 

 species they belong. In my comparatively short study of the genus I have 

 not been able to find a single character that will definitely separate the 

 two. Among my specimens are a few that have been assigned to this 

 species by one authority and to the other species by another authority. 



Maine to Minn., southw. to Fla. and Tex. 



13. Desmodium viridiflorum (L.) Beck. (Meibomia viridiflora (L.) 

 Ktze.) Velvet-leaf Tickclover. Map 1249. Infrequent or rare on the 

 slopes and crests of black and white oak ridges in a few of the southern 

 counties. The violet purple flowers turn greenish when dried, hence the 

 scientific name. 



N. Y., Mich, to Mo., southw. to Fla. and Tex. 



14. Desmodium marilandicum (L.) DC. (Meibomia marikmdica (L.) 

 Ktze.) Smooth Small-leaf Tickclover. Map 1250. Infrequent and gen- 

 erally on ridges in black and white oak woods in dry, sandy or gravelly 

 soil of low fertility. No doubt absent from many of the central counties 

 that have uniformly rich soil. 



Mass. to Minn., southw. to Fla., La., and Mo. 



15. Desmodium ciliare DC. (Desmodium obtusum Muhl. and Meibomia 

 obtusa (Muhl.) Vail.) Hairy Small-leaf Tickclover. Map 1251. In- 

 frequent to very local in dry, sandy or gravelly soil in open black oak 

 woods, usually on ridges. The range in Indiana is extended by reports from 

 Clark and Jefferson Counties. 



Out., Mich, to Nebr., southw. to Fla. and Tex. 



16. Desmodium rigidum (Ell.) DC. (Meibomia rigidd (Ell.) Ktze.) 

 Rigid Tickclover. Map 1252. Infrequent to very local in dry, sandy or 



