MANUAL OF THE GRASSES OF THE UNITED STATES 



651 



phase erect or reclining, the branch- 

 lets and foliage forming large clusters 

 from the nodes of the primary culms. 

 01 — Low moist or marshy ground, 

 Coastal Plain, New Jersey; Virginia 

 to Florida and Texas; Missouri (Car- 

 ter County); Bahamas, Cuba. 



Figure 937. — Panicum nitidum. Two views of spike- 

 let, and floret, X 10. (Type.) 



29. Panicum annuium Ashe. (Fig. 

 938.) Vernal phase usually purplish, 

 in small tufts or solitary; culms 35 to 

 60 cm. tall, the nodes densely 

 bearded ; sheaths velvety-pubescent 

 or the upper nearly glabrous; blades 

 densely velvety-pubescent on both 

 surfaces; panicle 6 to 8 cm. long; 

 spikelets 2 mm. long, elliptic, pubes- 

 cent. Autumnal phase suberect, bear- 

 ing in late autumn a few short erect 

 branches at the upper nodes. % 

 — Dry woods, Coastal Plain, rare, 

 Massachusetts to Florida and Missis- 

 sippi; Michigan; Missouri. 



Figure 938. — Panicum annuium. Two views of spike- 

 let, and floret, X 10. (Type.) 



30. Panicum mattamuskeetense 



Ashe. (Fig. 939.) Vernal phase oliva- 

 ceous, 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 12 cm. 

 long, 8 to 12 mm. wide, velvety- 

 pubescent, or the upper glabrous; 

 panicle 8 to 10 cm. long, many-flow- 



Figure 939. — Panicum mattamuskeetense. Two views 

 of spikelet, and floret, X 10. (Type coll.) 



ered; spikelets about 2.5 mm. long, 

 elliptic, pubescent. Autumnal phase 

 erect or leaning, branching rather 

 sparing^ from the middle nodes, 

 % — Low moist ground, Coastal 

 Plain, New York to South Carolina; 

 Indiana. 



Figure 940. — Panicum clutei. Two views of spikelet, 

 and floret, X 10. (Type.) 



31. Panicum clutei Nash. (Fig. 

 940.) Similar to P. mattamuskeetense 

 but less pubescent, onty the lower- 

 most nodes, sheaths, and blades vel- 

 vety; spikelets 2.2 to 2.3 mm. long. 

 % — Low moist ground and cran- 

 berry bogs, Massachusetts to South 

 Carolina; West Virginia. Intergrades 

 with P. mattamuskeetense. 



Figure 941. — Panicum boreale. Two views of spikelet, 

 and floret, X 10. (Type.) 



32. Panicum boreale Nash. (Fig. 



941.) Vernal culms usually erect, 30 

 to 50 cm. tall, the nodes mostly gla- 

 brous; blades erect or sometimes 

 spreading, 7 to 12 mm. wide, sparsely 

 ciliate at the rounded base; panicle 

 loosely rather few-flowered, 5 to 10 



