MANUAL OF THE GRASSES OF THE UNITED STATES 



691 



compact, the numerous branches as- 

 cending, very scabrous, spikelet-bear- 

 ing toward the ends; spikelets 4.5 to 

 5 mm. long, ovate, acuminate, 

 strongly many-nerved; fruit 3 mm. 

 long, stramineous to reddish brown. 

 O — Waste places, introduced or 

 escaped from cultivation, Northeast- 

 ern States and occasional in other 

 parts of the United States ; temperate 

 parts of the Old World. Broomcorn 

 millet is cultivated in the cooler parts 

 of the United States to a limited ex- 

 tent for forage and occasionally the 

 seed is used for feed for hogs, hence 

 it is sometimes known as hog millet. 

 Also called proso. Commonly culti- 

 vated in Europe and western Asia. 



6. Diffusa. — Perennials; culms stiff, 

 mostly tufted; sheaths mostly 

 hirsute; ligules membranaceous, 

 ciliate; spikelets pointed, 7- to 9- 

 nerved, glabrous; fruit smooth 

 and shining. 



Figure 1048. — Panicum capillar -ioides. Two views of 

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



139. Panicum capillarioides Vasey. 



(Fig. 1048.) Culms erect or ascending 

 from a knotted crown, 30 to 55 cm. 

 tall, appressed-pubescent or glabrate, 

 the nodes densely ascending-pubes- 

 cent; blades rather stiff, 10 to 30 cm. 

 long, 2 to 10 mm. wide, flat, harshly 

 papillose-pubescent; panicle diffuse, 



few-flowered, 10 to 20 cm. long, the 

 capillary branches stiffly spreading at 

 maturity; spikelets 5 to 6 cm. long, 

 lanceolate, long-acuminate, fruit 1.6 

 to 1.8 mm. long. % — Prairies and 

 plains, southern Texas and northern 

 Mexico. This species is readily dis- 

 tinguished from all others by the 

 peculiar elongated second glume and 

 sterile lemma. 



Panicum bergi Arech. Tufted, with 

 numerous leaves clustered at base; 

 sheaths hispid; blades involute; pan- 

 icle very diffuse, a third or more the 

 entire height of the plant, the lower 

 branches verticillate, conspicuously 

 pilose in the axils; spikelets short- 

 pointed, 2.2 to 2.6 mm. long. % 

 — Weed in grass plots, Experiment 

 Station, Tifton, Ga. Adventive from 

 South America. 



Panicum pilcomayense Hack. Culms 

 robust, few together, 70 to 100 cm. tall, at 

 least the lower nodes with a ring of ere t 

 hairs; blades flat, elongate, 4 to 8 mm. 

 wide; panicle very diffuse, nearly half the 

 height of the plant, the branches to 30 cm. 

 long, in fascicles of 2 to 4 or solitary, 

 scabrous, naked below, loosely branched 

 toward the ends, at least the lower axils 

 pilose; spikelets about 3 mm. long, on ap- 

 pressed pedicels. % — Collegeport, Mat- 

 agorda County, Tex. Probably introduced 

 from Paraguay. 



Figure 1049. — Panicum filipes. Two views of spike- 

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



140. Panicum filipes Scribn. (Fig. 

 1049.) Culms 30 to 80 cm. tall, erect 

 or ascending; blades laxly ascending 

 or spreading, 10 to 25 cm. long, 3 to 

 8 mm. wide, flat, glaucous, glabrous 

 or sometimes sparsely hirsute be- 

 neath; panicles 7 to 25 cm. long, usu- 



