. 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. slender,paniculately branched, i°-2° high. Leaves linear,or linear-lanceolate, 1-2* long, i-2i wide, entire,short-petioled, mostly alternate; heads discoid;bracts of the top-shaped involucre 8-10, linear ornarrowly oblong, herbaceous, pubescent, about 1long, their tips reddish; corollas purple, deeply 5-parted ; achenes narrowly obpyramidal. pubescent orglabrous, nearly as lo
. 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. slender,paniculately branched, i°-2° high. Leaves linear,or linear-lanceolate, 1-2* long, i-2i wide, entire,short-petioled, mostly alternate; heads discoid;bracts of the top-shaped involucre 8-10, linear ornarrowly oblong, herbaceous, pubescent, about 1long, their tips reddish; corollas purple, deeply 5-parted ; achenes narrowly obpyramidal. pubescent orglabrous, nearly as long as the involucre; pappusscales obovatc or nearly orbicular, rounded, or re-tuse, or sometimes minute, or none. In dry soil, Missouri to Texas and New 81. PICRADENIOPSIS Rydb.; Britton, Man. 1008. 1901. Herbs more or less woolly, with opposite leaves, and small corymbose heads, of both tubular and radiate yellow flowers. Involucre campanulate or hemispheric, its bracts in i or 2 series, herbaceous, obtuse, appressed, nearly equal. Receptacle small, nearly flat, naked, foveolate. Ray-flowers in i series, pistillate, fertile. Disk-flowers perfect, fertile, their corollas 5o8 COMPOSITAE. Vol. with campanulate or cylindric, 5-cleft limb. Anthers entire or emarginate at the base. Style-tips mostly truncate and obtuse. Achenes quadrangular, linear or oblong. Pappus of severalscales, obtuse or truncate and scarious at the apex. [Named for its resemblance to Picradenia.]Two known species, natives of western North America, the following typical. I. Picradeniopsis oppositifolia (Nutt.)Rydb. Picradeniopsis. Fig. 4536. Trichophylhim oppositifoUum Xutt. Gen. 2 : 167. 181S. Bahia oppositifoUum Xutt.; T. & G. Fl. N. A. 2 : P. oppositifolia Rydb.; Britton, Manual 1008. 1901. Perennial, herbaceous; stem densely cinereous,much branched, 4-12 high, very leafy. Leavesopposite, or the uppermost alternate, i-il long,palmately 2-5-parted into linear, obtuse or ob-t
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
