SORGHUMS. 113 



(2) Internodes medium ; sheaths scarcely over- 

 lapping ; leaves 8 — 11 ; peduncles mostly inclined ; 

 often recurved ; panicles ovate ; spikelets broadly 

 obovate ; 4'5 to 6 m.m. wide; lemmas awned. — YIl. 

 Milo. 

 II.— Pith dry. 



(A) Panicle lax, 2'5-7 dm. long; peduncles erect; spike- 

 lets elliptic-oval or obovate, 2'5 to 3'5 mm. wide; 

 lemmas awned. 



(1) Panicle 4-7 dm. long; rachis less than one-fifth 

 as long as the panicle. 



(a) Panicle umbelliform, the branches greatly 

 elongated, the tips drooping; seeds reddish, in- 

 cluded. — III. Broom-corn. 



(2) Panicle 2'5-4 dm. long; rachis more than two- 

 thirds as long as the panicle. 



(a) Panicle conical, the branches strongly droop- 

 ing ; glumes at maturity spreading involute ; seeds 

 white, brown, or somewhat buff. — IV. Shallu. 



(b) Panicle oval or obovate, the branches spread- 

 ing ; glumes at maturity appressed, not involute; 

 seeds white, brown or reddish. — V. Kowliang. 



(B) Panicle compact, l-2'5 dm. long; peduncles erect or 

 recurved ; rachis more than two-thirds as long as the 

 panicle. 



(1) Spikelets elliptic, oval or obovate, 2" 5 to 3' 5 



mm. wide ; lemmas awned. — V. Kowliang. 



(2) Spikelets broadly obovate; 4-5 to 6 mm. wide. 



(a) Glumes grey or greenish ; not wrinkled : 



densely pubescent ; lemmas awned or awnless ; seeds 



strongly flattened. — VI. Durra. 



(6) Glumes deep brown or black, transversely 



wrinkled, thinly pubescent; lemmas awned; seeds 



slightly flattened.— VII. Milo. 



CLiiiATE. — Sorghums do best in a rather dry, hot climate, 



but do not do too well at high altitudes where the nights are 



cool. 



While maize and sorghums both prefer climates having 

 plenty of sunshine and warmth, they differ in that the de- 

 veloped sorghums of to-day prefer less humid conditions than 

 maize. No doubt some of the tall-growing tropical forms 

 require very humid conditions for their growth, and the broom- 



