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MISC. PUBLICATION 200, U. S. DEFT. OF AGRICULTURE 



covering the fruit. Autumnal phase 

 sparingly branched, the branches 

 elongate, ascending, the panicles 1.5 

 to 5 cm. long. % — Open sandy 

 ground, swamps, and moist places, 

 Rhode Island, New Jersey, and 

 eastern Pennsylvania. 



Figure 1014. — Panicum mundum. Two views of 

 spikelet, and floret, X 10. (Fernald and Long 6017, 

 Va.) 



105. Panicum mundum Fernald. 

 (Fig. 1014.) Culms 50 to 140 cm. 

 tall, densely tufted, pilose or papil- 

 lose-pilose with ascending hairs, the 

 nodes retrorsely bearded, with a gla- 

 brous glandular ring below; sheaths 

 much shorter than the internodes, 

 viscid-spotted, ascending-pilose or 

 glabrate; ligule about 1 mm. long; 

 blades 6 to 15 cm. long, 8 to 13 mm. 

 wide, lanceolate, subcordate, papil- 

 lose-ciliate toward the base; primary 

 panicle 7 to 12 cm. long, 5 to 10 

 cm. wide, the branches ascending; 

 spikelets 1.8 to 2.2 mm. long, sub- 

 globose or ellipsoid, densely pubes- 

 cent, first glume about one-fourth the 

 length of the spikelet, subacute. Au- 

 tumnal phase sparingly branched, the 

 panicles 1 to 6 cm. long. % — 

 Borders of swamps and sandy, peaty 

 meadows, southeastern Virginia 

 (Princess Anne and Sussex Counties) 

 and Durham County, N. C. 



106. Panicum scabriusculum Ell. 

 (Fig. 1015.) Vernal phase grayish 

 olive green; culms erect, 1 to 1.5 m. 

 tall, scabrous at least below the nodes, 

 sometimes puberulent; sheaths gla- 

 brous or more or less hispid at least 

 toward the summit, often mottled or 

 white-spotted, commonly swollen at 

 the base and contracted toward the 

 summit; blades stiffly ascending or 

 spreading, often reflexed, 15 to 25 

 cm. long, 9 to 12 mm. wide, glabrous 

 or scabrous, often more or less pubes- 

 cent beneath, tapering to an involute 

 point; panicle 10 to 20 cm. long; 

 spikelets 2.3 to 2.6 mm. long, ovate, 

 glabrous or obscurely puberulent. 

 Autumnal culms erect, branching 

 from the middle and upper nodes, the 

 branches appressed, finally forming 

 dense oblong masses along the upper 

 part of the primary culm, the pan- 

 icles partly or entirely enclosed in the 

 sheaths. % — Moist ground, espe- 

 cially along ditches, streams, and 

 swamps, Coastal Plain, New Jersey 

 to Florida and Texas. 



Figure 1015. — Panicum scabriusculum. Two views of 

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



Figure 1016. — Panicum cryptanthum. Two views of 

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



107. Panicum cryptanthum Ashe. 

 (Fig. 1016.) Vernal culms erect, 80 to 

 100 cm. tall, glabrous except the usu- 

 ally bearded nodes; sheaths glabrous 

 or the lowermost sparsely hirsute, the 

 upper somewhat inflated; blades stiff, 

 glabrous, sparingly ciliate at base, 10 

 to 15 cm. long, 7 to 9 mm. wide; pan- 

 icle 6 to 10 cm. long, the axis and as- 

 cending branches viscid-spotted; 

 spikelets 2.2 to 2.4 mm. long, lance- 

 olate-elliptic, pointed. Autumnal 

 culms erect, sparingly branching from 

 the middle nodes, the panicles partly 

 hidden in the sheaths. % — Low 



