MANUAL OF THE GRASSES OF THE UNITED STATES 627 



28. Panicum mattamuskeetense Ashe. (Fig. 1316.) Vernal phase 

 olivaceous, usually tinged with purple; culms erect, often 1 m tall, the 

 nodes bearded or the upper puberulent only; sheaths velvety-pilose 

 or the upper sometimes glabrous: blades horizontally spreading, 8 to 



Figure 1316.— Panicum mattamuskee- 

 tense. Two views of spikelet, and 

 floret, X 10. (Type coll.) 



Figure 1317.— Distribution of 

 Panicum mattamuskeetense. 



12 cm long, 8 to 12 mm wide, velvety-pubescent, or the upper glabrous; 

 panicle 8 to 10 cm long, many-flowered; spikelets about 2.5 mm long, 

 elliptic, pubescent. Autumnal phase erect or leaning, branching 

 rather sparingly from the middle nodes. % —Low moist ground, 

 Coastal Plain, New York to South Carolina (fig. 1317). 



Figure 1319.— Distribution of 

 Panicum clutei. 



Figure 1318.— Panicum clutei. Two 

 views of spikelet, and floret, X 10. 

 (Type.) 



29. Panicum clutei Nash. (Fig. 1318.) Similar to P. mattamus- 

 keetense but less pubescent, only the lowermost nodes, sheaths, and 

 blades velvety ; spikelets 2.2 to 2.3 mm long. QL —Low moist ground 

 and cranberry bogs, Massachusetts to North Carolina (fig. 1319). 

 Intergrades with P. mattamuskeetense. 



30. Panicum boreale Nash. (Fig. 1320.) Vernal culms usually 

 erect, 30 to 50 cm tall, the nodes mostly glabrous; blades erect or 



Figure 1320.— Panicum boreale. Two 

 views of spikelet, and floret, X 10. 

 (Type.) 



Figure 1321.— Distribution of 

 Panicum boreale. 



sometimes spreading, 7 to 12 mm wide, sparsely ciliate at the rounded 

 base; panicle loosely rather few-flowered, 5 to 10 cm long; spikelets 

 2 to 2.2 mm long, elliptic, pubescent. Autumnal phase erect or lean- 

 ing, sparingly branching from all the nodes in late summer, the 

 branches erect, the leaves and panicles not greatly reduced. % — 

 Moist open ground or woods, Newfoundland to Minnesota, south to 

 New Jersey and Indiana (fig. 1321). 



