Senecio flavovirens Rydb.

  • Authority

    New York Botanical Garden. Herbarium of Dr. Per Axel Rydberg. Purchased, 1899. Contributions from the New York Botanical Garden.

  • Family

    Asteraceae

  • Scientific Name

    Senecio flavovirens Rydb.

  • Description

    Species Description - Light or yellowish green, slender, perennial, in age glabrate or slightly floccose at the base of the leaves: stem 3-4 dm. high, striate, pale: basal leaves 3-8 cm. long, obovate or broadly oval, generally tapering into the petioles, but sometimes truncate at the bases, obtuse, crenate or sinuate, light green: lower stem leaves oblanceolate in outline and petioled; the upper lanceolate or linear in outline and sessile; all deeply pinnatifid with narrow, oblong or linear segments.: cymes contracted, corymbiform: heads 7-8 mm. high; bracts linear, acute, yellowish-green, and occasionally with brownish tips, a little shorter than the disk; calyculate ones few, linear, small and crisp: rays pale yellow, about 6 mm. long and 1.5 mm. wide, 4-nerved, or very often lacking: achenes hispid puberulent on the angles.

  • Discussion

    Nearest related to the eastern 5. Balsamitac, but characterized by its yellowish green color and a more contracted cyme. It grows at an altitude of 2000-3000 m. [Plate 5, f 4.]

    Idaho: Beaver Canon, 1895, Ryberg (type in the herbarium of N. Y. Botanical Garden).

    Montana: Deer Lodge, 1895, Rydberg, 2850 (rayless) ; Helena, 1887, F. D. Kelscy, 501.

    Wyoming: Buffalo Fork, 1897, Tweedy, 3S6 ; Laramie Plains, 1889, E. L. Greene (rayless); Green River, 1894, Aven Nelson, ioj6 (rayless).