160 



Paniceae 



Panicum 



Miles 



^30 



Map 284 



Panicum perlongum Nash 



o 33 



Map 286 

 Panicum linearifolium 

 ^ar. Wernen (Scribn.) Fern. 



Porter Counties although it has been reported from Lake County where 

 it probably occurs or was once found. The mass distribution of this species 

 is along the Coastal Plain. 



Mass. to Fla., westw. to Mich., Tenn., and Tex. 



6. DEPAUPERATA 



Culms simple, the vernal ones generally 15-35 cm high, the nodes 

 ascending-pilose; ligule a band of hairs of irregular length up to 1 mm 

 long; blades long-linear; spikelets 2.2-4 mm long, somewhat shrunken at 

 the base; palea of sterile floret usually half to two thirds as long as the 

 fruit; fruit smooth, glossy, the lemma strongly indurated. The panicles 

 of the autumnal phase are borne on short branches from the lower nodes. 



Spikelets beaked, mostly 3.2-3.8 mm long (rarely as short as 3 mm or as long as 4 mm). 



Sheaths pilose IIP. depauperatum. 



Sheaths glabrous or nearly so 11a. P. depauperatum var. psilophyllum. 



Spikelets not beaked, 3 mm long or less (rarely 3.2 mm long). 



Spikelets 2.7-3.2 mm long; panicles narrow, usually less than a third as wide as 



long; ligules mostly about 1 mm long 12. P. perlongum. 



Spikelets 2.2-2.7 mm long; panicles usually more than a third as wide as long; ligules 

 mostly less than 1 mm long. 



Sheaths pilose 13. P. linearifolium. 



Sheaths glabrous or nearly so 13a. P. linearifolium var. Werneri. 



11. Panicum depauperatum Muhl. Map 283. Infrequent in southern 

 Indiana in open woodland on the crests of black oak, black and white oak, 

 and chestnut oak ridges. In the northern part of the state it is local 

 except in the dune area, where it is frequent in very sandy soil on open, 

 wooded dunes or on sandy knolls and ridges. 



N. S., Que. to Minn., southw. to Ga. and Tex. 



11a. Panicum depauperatum var. psilophyllum Fern. (Rhodora 23: 

 193-194. 1921.) This northern variety has the habitat of the species and 

 is found only in sandy areas of the northern part of the state. 



