. Cyclopedia of farm crops. Farm produce; Agriculture. SORGHUM SORGHUM 575 spike-like panicle in Orange and Sumac sorghums, kafirs, and others; and a dense, ovate or globose, head-like panicle in many durras; the rachis or central axis of the panicle greatly shortened in the corym- bose forms, as broom-corns, from one-half as long as to equaling the panicle in sweet sorghums, and nearly equaling it in kafir and durra varieties; spikelets in pairs, one sessile, fertile, prominent, the other stalked, sterile, slender, less conspicuous, and falling off readily at maturity; seeds oval, obovate, su
. Cyclopedia of farm crops. Farm produce; Agriculture. SORGHUM SORGHUM 575 spike-like panicle in Orange and Sumac sorghums, kafirs, and others; and a dense, ovate or globose, head-like panicle in many durras; the rachis or central axis of the panicle greatly shortened in the corym- bose forms, as broom-corns, from one-half as long as to equaling the panicle in sweet sorghums, and nearly equaling it in kafir and durra varieties; spikelets in pairs, one sessile, fertile, prominent, the other stalked, sterile, slender, less conspicuous, and falling off readily at maturity; seeds oval, obovate, subglobose or lenticu- lar in shape; white, pearly, yel- lowish, reddish yellow, red or reddish brown in color ; shorter than the empty glumes (in- cluded) or longer (exserted); empty glumes (hulls or outer chaff) usually thick, leathery, much shorter than to long«r than the seed, rounded or acute at the apex; normally greenish white while immature, some- times remaining so in maturity, in other varieties becoming dif- ferent shades of red, brown and black, more or less silky-hairy, at least while young, some forms almost glabrous at ma- turity ; flowering glume thin, transparent, awned or awnless. Groups. The cultivated sorghums of this country may properly be divided into five groups, as follows: broom-corns, shallu, sweet or saccharine sorghums, and durras. Popularly. some of the kafirs have a fairly sweet juice and could doubtless be developed into saccharine varieties. The term kaoliang, mentioned on page 572, designates Chinese varieties in general, it being the Chinese name for sorghums. KEY TO GROUPS A. Pith dry: Head loose, 10-28 inches long ; spikelets oval or obovate, small: Rachis very short; seeds reddish I. Broom-corn Rachis as long as head ; seeds white or pearly .... II. Shallu Head compact, 4-9 inches long ; spikelets broadly obovate, large V. Durra AA. Pith juicy : Juice abundant and very sweet. III. Sorghum Juice scanty, subacid or some- . what sweet: Heads er
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