Panicum 



Paniceae 



163 



o ~~To 

 Map 290 



Panicum dichotomum L. 



Panicum mattamuskeetense Ashe 



17. Panicum dichotomum L. (Including Panicum barbulatum Michx.) 

 Map 290. Frequent in the northern and southern counties. It is usually 

 found in open places on the crests and slopes of black and white oak woods 

 and less frequently in beech and sugar maple woods. It prefers a poor 

 soil and is sometimes found in the dunes growing in almost pure sand. 



Some authors separate from this species, under the name of Panicum 

 barbulatum Michx., plants with broad leaves and pubescent nodes. In 

 Indiana the two forms intergrade so that I cannot make a satisfactory 

 division of them. 



N. B. to 111., southw. to Fla. and e. Tex. 



18. Panicum mattamuskeetense Ashe. Map 291. Our only specimens 

 were found in 1935 by Ralph M. Kriebel in the northeastern corner of 

 section 16 of Pleasant Run Township, Lawrence County. They were found 

 in a shallow drainage ditch near Little Salt Creek bridge between Helton- 

 ville and Bartlettsville where they were associated with Panicum clandes- 

 tinum. The determination was made by Agnes Chase. Since this was 

 written Kriebel found another colony near Huron, about 20 miles distant. 



N. Y., along the coast to N. C, and in Ind. 



19. Panicum boreale Nash. Map 292. A rare grass of marshes in the 

 lake area. It is also occasionally found in the mucky borders of ponds 

 and lakes. 



Newf. to Minn., southw. to N. J. and Ind. 



20. Panicum lucidum Ashe. Map 293. Our Indiana record is based 

 upon Umbach's specimen no. 4962 collected at Dune Park, Porter County, 

 which is deposited in the U. S. National Herbarium. Pepoon reports it 

 also from the same area. It is an inhabitant of wet woods and sphagnum 

 marshes. 



Coastal Plain, Mass. to Fla., Ark., and Tex. ; also Ind. and Mich. 



