A text-book of grasses with especial reference to the economic species of the United States . (L.) Brot. for thesecond. H. haUpensis L. usually 3 to 5 feet tall,erect, smooth, often glaucous, pro-ducing strong creeping rhizomes;sheaths smooth; Ugule membra-naceous, about 2 mm. long, theupper half a cihate fringe; bladessmooth or nearly so, somewhatscabrous on the margins, 1 to 3 feetlong, mostly K to 3^ inch wide,tapering to a fine point, the whitemidrib conspicuous; panicle openand spreading, 6 inches to 2 feetlong, usually more or less reddishor purple, the branches 2 to
A text-book of grasses with especial reference to the economic species of the United States . (L.) Brot. for thesecond. H. haUpensis L. usually 3 to 5 feet tall,erect, smooth, often glaucous, pro-ducing strong creeping rhizomes;sheaths smooth; Ugule membra-naceous, about 2 mm. long, theupper half a cihate fringe; bladessmooth or nearly so, somewhatscabrous on the margins, 1 to 3 feetlong, mostly K to 3^ inch wide,tapering to a fine point, the whitemidrib conspicuous; panicle openand spreading, 6 inches to 2 feetlong, usually more or less reddishor purple, the branches 2 to 4together, naked below, pubescentat the base; spikelets somewhatcrowded along the upper part ofthe branches, in pairs or the termi-nal in 3s, 1 sessile and fertile and1 or 2 pediceled and staminate;fertile spikelet about 5 mm. long,flattened dorsaUy, elliptical or ovate-lanceolate, indistinctly nerved, firmand coriaceous, at first pubes-cent but later becoming smooth Fig. 17. Holcus halepensis. Inflorescenceand rhizomes, X H, a terminal fertile spike-let with two staminate spikelets, 172 A TEXT-BOOK OF GRASSES and shining on the exposed parts; staminate spikelets more slender,and slightly longer than the sessile, distinctly nerved, membra-naceous, the pedicel about half as long as the sessile spikelet, staminate spikelets disarticulate early so that the mature fertilespikelets show only the 1 or 2 ciliate pedicels at the back. The wholeplant is frequently subject to a disease which produces purple spotson the stem and leaves. This is also observed in Holcus Sorghum. 211. Classification of the sorghums.—Ball (loc. cit.)classifies the sorghums as follows: A. Pith juicy. B. Juice abundant and very sweet Sorgo. BB. Juice scanty, slightly sweet to subacid. c. Panicles cylindrical; peduncles erect; spike-lets 3 to 4 mm. wide; lemmas awnless. . Panicles ovate; peduncle mostly inclined,often recurved; spikelets to 6 mm. wide; lemmas awned Milo. AA. Pith
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Keywords: ., bookauthorhi, bookcentury1900, bookdecade1910, booksubjectgrasses
