. Bulletin. Gramineae -- United States; Forage plants -- United States. 18 tt Setie antrorsely scabrous. i Flowering glume smooth or nearly so. § Rachvi scabrous. 8. CHiETOCHLOA AMBIGTJA (Guss.) n. comb. Setaria verticillata \ar. amhigua Guss. Prodr. 1: 80 (1827). Setaria ambigua Guss. Fl. Sic. Syn. 1: 114 (1842). Not;S'etoria ambigua Schrad. Linnsea 12: 430 (1838). (Fig. 7.) A csespitose, erect, much branchied annual, 2 to 5 dm. high, with compressed culms, lanceolate leaves, and rather loose spicate ]ianicles 4 to 10 cm. long. Culms geniculate at the base, glab- rous, leafy, the nodes brown,
. Bulletin. Gramineae -- United States; Forage plants -- United States. 18 tt Setie antrorsely scabrous. i Flowering glume smooth or nearly so. § Rachvi scabrous. 8. CHiETOCHLOA AMBIGTJA (Guss.) n. comb. Setaria verticillata \ar. amhigua Guss. Prodr. 1: 80 (1827). Setaria ambigua Guss. Fl. Sic. Syn. 1: 114 (1842). Not;S'etoria ambigua Schrad. Linnsea 12: 430 (1838). (Fig. 7.) A csespitose, erect, much branchied annual, 2 to 5 dm. high, with compressed culms, lanceolate leaves, and rather loose spicate ]ianicles 4 to 10 cm. long. Culms geniculate at the base, glab- rous, leafy, the nodes brown, glabrous; sheaths striate, compressed, loose, about equaling the internodes, thin, glabrous, the margin ciliate above; ligule about 1 mm. long, densely ciliate-fringed* with white hairs, which are 1 mm. long or less. Leaf- blades lanceolate, cordate at the base, long-acuminate at the apex, 5 to 15 cm. long, 6 to 15 mm. wide, scabrous on both sides and on the cartilaguaous margins. Axis of the inflorescence chan- neled, scabrous, but not pi- lose; branches short, sub- verticillate, densely flowered, the lower rather remote; setse solitary, stout, some- what flexuous, antrorsely scabrous, 4 to 8 mm. long. Spikelets elliptical, 2 to mm. long; first glume tri- angular-cordate, 3-nerved, claspmg the base of the spikelet and about one-third its length; second and third glumes equaling the flower- ing glume in length, obtuse, 5 to 7 nerved, the third with a palea; flowering glume 2 mm. long, elliptical, sounded at the apex, striate, very finely transversely wrinkled, not rugose. Palea similar in texture and markings. Collected on "ballast," Camden, N. J., by F. Lamson-Scribner, 1884, and at Mobile, Ala., by Chas. Mohr, 1884. An adventitious European annual with tlie habit and inflorescence of C. verticil- lata (L.) Scribner, 1)ut readily distinguished from that species by its ha\dng the setic antrorsely instead of retrorsely scabrous. Distinguished from C. viriditi (L.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforageplantsunitedst
