74 



THE TRUE GRASSES. 



runners with scale-like leaves. The open-flowered spike- 

 lets of the terminal panicle 

 sterile. 



Species two, in the South- 

 eastern United States. 



60. (5) Eriochloa Kunth. 

 (Hdopus Trin., (Edipachne Link) 

 (Fig. 25). Spikelets in ra- 

 cemes and these arranged again 

 in simple or compound racemes. 

 Spikelets, aside from the annu- 

 lar callus, as in Paspalum. 

 Flowering glume mucronate- 

 pointed or very short-awned. 



Species five, in the tropical 

 and subtropical zones of both 

 hemispheres. 



61. (7) Isachne Brown. Spike- 

 lets in panicles, two-flowered, 

 the fruiting glumes with the 

 grain falling out of the persist- 

 ent empty ones. 



Species about twenty, in 

 the warmer countries of both 

 hemispheres, especially of the 

 Old World. 



62. (8) Panicum L. Spike- 

 lets in spikes, racemes, or panicles, one- to two-flowered. 

 First empty glume usually smaller than the second, and 

 this as large as the third, which has the same struct- 

 ure but often encloses a $ flower. Flowering glume and 

 palea indurated, awnless or very short-awned. Stamens 

 three. 



Species about three hundred, in all warm and a few 

 in temperate countries. They form, with species of Pas- 

 palum, excellent forage in the savannas and campos of 

 South America. 



Sec. I. Digitaria (Pers. as a genus, SyntherismaWalt.). 

 Racemes (false spikes) simple, one-sided, digitate, rarely 

 scattered. P. sanguinale L. (Fig. 26), "Blutfennich" is 



Fig. 25. — Eriochloa grandiflora 

 (Triii.) Hack. (Helopus grandi- 

 florus Trin.) (After Trin., Spec. 

 Gram. pi. 278.) 



