GRAMINE^E. 393 



11. MILIUM. Linn, 



Glume 2-valved, naked, beardless. PalecB 2, oblong, con- 

 cave, shorter than the glume, awnless. Seed coated with the 

 indurated palese. Flowers panicled. Triandria. Digynia. 



1. M. fffusum Linn. : panicle diffuse, compound ; branches horizon- 

 tal ; glumes ovate, very obtuse ; paleae awnless, smooth and shining ; 

 leaves broad-linear. 



HAB. Woods. Can. and N. S. July. U-Culm 58 feet 

 high, simple, smooth. Panicle oblong, 8 inches in length. 



Common Millet- grass. 



2. M. amphicarpon Pursh : leaves linear-lanceolate, hairy, ciliate ; 

 panicle simple, contracted, bearing perfect flowers ; fertile flowers in 

 solitary elongated radical scapes, at length subterraneous. M. cilla- 

 tum Muhl. 



HAB.. Sandy swamps. N. J. Aug., Sept. If. Culms numer- 

 ous, 12 feet high, assurgent. Panicle appressed. Glumes 

 acuminate. This species is well figured by Pursh. 



3. M. pungens Torr. : culm erect ; leaves lanceolate, very short, 

 pungent, at length involute ; panicle contracted ; branches generally 

 in pairs, 2-flowered ; flowers awnless, ovate ; palese hairy. 



HAB. Rocky hills. N. S. May. If. CwZm slender, 1218 

 inches high, simple, rigid. Radical leaves 68 inches long, 

 about a line wide, acute and pungent. Panicle oblong, few- 

 flowered. Style 2-parted. Dicarf Millet-grass. 



12. PIPTATHERUM. Beam. 



Glume membranaceous. Palea cartilaginous, elliptical, 

 shorter than the glume ; lower one awned at the tip. Scales 

 ovate, entire. Flowers panicled. Triandria. Digynia. 



P. nigrum Torr.: panicle simple; flowers racemose, ovate-lanceo- 

 late ; paleee black, hairy ; awn as long again as the glume. Oryzopsis 

 melanocarpa Muhl. Milium racemosum Smith. Big. 



HAB. Rocky hills. N. S. Aug. U-Culm 23 feet high. 

 Leaves long, linear-lanceolate. Panicle few-flowered, flexuous. 

 Lower palece with a very long awn. Seed black. 



Black-seeded Millet-grass. 



13. PANICUM. Linn. 



Glume 2-valved ; valves unequal, the lower one very small. 

 Florets dissimilar, the lower one ajbortive, or antheriferous, 

 Palece concave, equal, beardless. Seed coated with the hard- 

 ened paleae. Panicle loose and scattered. 



Triandria. Digynia. 

 * Flowers in dense racemes. 

 1. P. cms- galli Linn. ; racemes alternate and in pairs, compound ; 



