. 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. arothrae (Pursh) Britton and Rtisby. Broom-weed. Fig. 4190. Solidago Sarothrae Pursh, Fl. Am. Sept. 540. Euthamiae T. &G. Fl. N. A. 2 : 193. Sarothrae Britton & Rusby, Trans. N. Sci. 7 : 10. 1887. Glabrous or minutely pubescent, bushy, woodyat the base, i°-il° high, the branches rigid, as-cending. Leaves linear, i-ii long, A-i wide,ac
. 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. arothrae (Pursh) Britton and Rtisby. Broom-weed. Fig. 4190. Solidago Sarothrae Pursh, Fl. Am. Sept. 540. Euthamiae T. &G. Fl. N. A. 2 : 193. Sarothrae Britton & Rusby, Trans. N. Sci. 7 : 10. 1887. Glabrous or minutely pubescent, bushy, woodyat the base, i°-il° high, the branches rigid, as-cending. Leaves linear, i-ii long, A-i wide,acute; heads oblong, \¥-2 high, few-flowered,usually in clusters of 2-5 at the ends of thenumerous branches; rays 1-6, scarcely i long;scales of the pappus linear-oblong, subulate oracuminate; achenes pubescent. In dry or rocky soil, Manitoba and Minnesota towestern Nebraska, Kansas, Texas and Sonora, west toAlberta and Utah. Adventive at Rochester, N. western plants formerly referred to this speciesprove to be distinct. Rabbit-brush. Gutierrezia linearis Rydb., of the Rocky Mountainregion, ranging eastward into Kansas and Nebraska,differs in being more woody and has somewhat II. AMPHIACHYRIS [DC] Xutt. Trans. Am. Phil. Soc. II. 7: 313. 1841. Erect, much branched, glabrous herbs, with small alternate entire leaves, and verynumerous small heads of both tubular and radiate yellow flowers, solitary or clustered atthe ends of the branches. Involucre ovoid or hemispheric, its bracts coriaceous, imbricatedin few series. Receptacle naked. Ray-flowers pistillate. Disk-flowers perfect, but sterile,or staminate. Pappus of the ray-flowers obsolete or coroniform, that of the disk-flowers of5-20 subulate scales or bristles somewhat united at the base. Achenes pubescent. [Greek,chaff-around.] Two known species, natives of the south-central United States, the following typical. I. Amphiachyris dracunculoides (DC.)Xutt. Amphiachyris. Fig. 4191. Brachyris dracunc
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
