37 



Fig. 23. Panicum miliaceum L. — a, A spikelet showing the first and third- 

 glumes; 5, a spikelet showing the lower margins of the first and dorsal surface 

 of the second glume; c, anterior view of the third glume, showing the small palea 

 in its axis; d, dorsal view of the fourth or flowering glume; e, anterior view of 

 same, showing the palea. Figures 37 to 64 in Bui. 7 and 339 to 399 in Bui. 17 

 illustrate other species of the genus. 



23. PANICUM Linn. Sp. PI. 55. 1753. Spikelets 1-flowered or sometimes with 

 a staminate flower below the hermaphrodite terminal one, in spikes, racemes, 

 or panicles. Glumes 4, the 1st usually much shorter than the others, very rarely 

 wanting (some species of section Syntherisma) ; 2d glume empty, equaling or 

 somewhat shorter than the 3d, which is empty or has a palea or even a stami- 

 nate flower in its axil; 4th glume smooth and shining, coriaceous, much firmer 

 in texture than the others. Palea similar in texture to its glume and closely 

 embraced by it. Grain inclosed within the hardened fruiting glume and palea, 

 free. Annuals or perennials varying greatly in habit of growth, foliage, and 

 inflorescence. 



Species about 300, throughout the tropical and subtropical regions of both 

 hemispheres; a few only in the temperate regions. Several species occur as 

 weeds throughout all civilized countries. Nearly 100 species and varieties are 

 recorded as having been found within the United States. 



