Balsamorhiza tomentosa 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

    Balsamorhiza tomentosa Rydb.

  • Description

    Species Description - A white-tomentose perennial with thick root; but the tomentum is shorter and finer than in B. sagittata. Basal leaves with long petioles; blades about 12 dm. long, ovate-lanceolate with subcordate bases, 5-20 cm. long, acute, coarsely toothed; stemleaves generally two, including the slender petioles about i dm. long, lanceolate to linear elliptic, acute at both ends: stem 3-4 dm. high, involucre densely floccose, over 2 cm. broad: outer bracts half longer than the inner, reflexed: rays about 3 cm. long and 1 cm. wide; achenes glabrous.

  • Discussion

    Closely related to B. sagittata this species differs mainly in the toothed leaves, shorter tomentum and longer outer bracts.

    Wyoming : Headwaters of Tongue River in the Big Horn Mountains, 1898, F. Tweedy, 10 *

  • Distribution

    Wyoming

    Wyoming United States of America North America|