Senecio rosulatus 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 rosulatus Rydb.

  • Description

    Species Description - More or less tomentose perennial, with a branched rootstock and generally numerous underground stolons producing leafy offsets: stems 2-3 dm. high, floccose or sometimes becoming almost glabrate in age; first leaves of the offsets spatulate and entire; other basal leaves and lower stem leaves oblanceolate, finely white tomentose especially on the lower surface, occasionally becoming more glabrate in age, sinuately pinnatifid with rounded lobes, petioled: upper stem leaves lanceolate or linear, sessile, auricled at the base also with rounded lobes: cyme corymbiform, open: heads small, 5-6 mm. high, floccose at the base: bracts about 12, broadly lanceolate, acute, yellowish with rather broad membranous margins, much shorter than the disk: rays about 5 mm. long and 2 mm. wide, 4-5 -nerved: achenes strongly striate, glabrous. The species has been confused with S. Fendleri, but is distinguished by the more slender rootstock and the numerous branches forming offsets, the entire first leaves not seen in that species and the short rounded entire lobes of the stem leaves. The heads are usually also smaller. It grows at an altitude of 2500-4000 m. [Plate 6, f. 4, 4a.]

  • Discussion

    Colorado: Georgetown, 1885, N. H. Patterson 79 (type); Golden City, 1892, E. L. Greene; 1862, Hall & Harbour, 333, in part; 1871, W. M. Canby ; Twin Lakes, 1873, J. M. Coulter; Pike's Peak, 1884, G.W. Letterman, 260; Caribou, 1891, E. Penard, 228 ; Fort Collins, 1896, C. F. Baker; Silver Plume, Gray's Peak, and Georgetown, 1895, P. A. Rydberg.

  • Distribution

    Colorado; Colorado: Georgetown, 1885, N. H. Patterson 79 (type); Golden City, 1892, E. L. Greene; 1862, Hall & Harbour, 333, in part; 1871, W. M. Canby; Twin Lakes, 1873, J. M. Coulter; Pike's Peak, 1884, G.W. Letterman, 260; Caribou, 1891, E. Penard, 228; Fort Collins, 1896, C. F. Baker; Silver Plume, Gray's Peak, and Georgetown, 1895, P. A. Rydberg.

    Colorado United States of America North America|