. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. tips somewhat spreading, the outer shorter thanthe inner; achenes densely silky tomentose. In dry soil. South Dakota to Assiniboia, Nebraska,New Mexico and Arizona. July-Aug. 2. Sideranthus annuus Rydb. ViscidSideranthus. Fig. 4209. Sideranthus annuus Rydb. Bull. Torr. Club 31 : 653. rubiginosus A. Gray, Syn. Fl. i-: 130. 1884. Not T. & G. Viscid, glandular-pu
. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. tips somewhat spreading, the outer shorter thanthe inner; achenes densely silky tomentose. In dry soil. South Dakota to Assiniboia, Nebraska,New Mexico and Arizona. July-Aug. 2. Sideranthus annuus Rydb. ViscidSideranthus. Fig. 4209. Sideranthus annuus Rydb. Bull. Torr. Club 31 : 653. rubiginosus A. Gray, Syn. Fl. i-: 130. 1884. Not T. & G. Viscid, glandular-pubescent, erect, annual,branched near the summit, i°-3° high. Leavessessile, or the lowest narrowed into shortpetioles, oblong, lanceolate, or oblanceolate,conspicuously dentate with distant awn-point-ed teeth, acute or obtusish at the apex. iA-2ilong, 2-6 wide; heads several, cymose-paniculate, 8-i5 broad; involucre hemi-spheric, its bracts linear-subulate with spread-ing tips; rays large; pappus bristles rigid, veryunequal; achenes villous-canescent, turbinate,not compressed. On plains and in canons, Nebraska, Kansasand Colorado. Erroneously referred in our firstedition to Eriocarpum rubiginosum. Genus 19. THISTLE FAMILY
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
