Xanthorhiza Marshall
  • Arbust. Amer. 167–169. 1785.
  • Yellowroot [Greek xanthos, yellow, and rhiza, root]

Cite taxon page as 'WFO (2021): Xanthorhiza Marshall. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000040893. Accessed on: 21 Oct 2021'

General Information

Shrubs , deciduous, from long, slender, yellow rhizomes. Leaves cauline, petiolate; cauline leaves alternate. Leaf blade 1-2-pinnately compound; leaflets lance-ovate to broadly ovate or rhombic, margins variously sharply cleft, incised, or serrate. Inflorescences axillary, many-flowered panicles, 5-21 cm; bracts scalelike, not forming involucre. Flowers bisexual, radially symmetric; sepals persistent in fruit, 5, dark brown-purple to greenish yellow, plane, lanceolate to oblanceolate, usually clawed, ca. 2.5-5 mm; petals 5, distinct, brown-purple, plane, peltate, 0.5-0.9 mm; nectary terminal, transversely oblong, 2-lobed; stamens 5 (or 10); filaments with base expanded; staminodes absent between stamens and pistils; pistils (2-)5-10, simple; ovules 2, basal ovule aborting; style present. Fruits follicles, aggregate, sessile, compressed, obliquely oblong or somewhat sickle-shaped, sides not veined; beak becoming abaxial, curved, 0.4-0.8 mm. Seeds reddish brown, ovoid, smooth. x =18.

  • Provided by: [A].Flora of North America @ efloras.org
    • Source: [
    • 1
    • ]. 

    "Sep 5, small, spreading; pet none, staminodia 5, clawed, the nectariferous part transversely oblong, 2-lobed; stamens 5–10; pistils mostly 5–10; style subulate; ovules 2; fr an obliquely oblong follicle, with a single distal seed (or 2 seeds); low shrub with yellow wood, bearing a crowded cluster of pinnately compound lvs and several simple racemes or raceme-like panicles of small, purple-brown fls. Monospecific."

  • Provided by: [B].New York Botanical Garden
    • Source: [
    • 2
    • ]. 

    Other Local Names

    Yellowroot [Greek xanthos, yellow, and rhiza, root]


     Information From

    Flora of North America @ efloras.org
    'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • A Flora of North America Association
    New York Botanical Garden
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • B Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    • C CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    World Flora Online Data. 2018.
    • D CC0 1.0 Universal (CC0 1.0).