Thalictrum venulosum

Veiny Meadowrue

Veiny Meadowrue, Photo courtesy Wisconsin State Herbarium and Kim Alan Chapman
Veiny Meadowrue
Photo courtesy Wisconsin State Herbarium
and Kim Alan Chapman

Flora, fauna, earth, and sky...
The natural history of the northwoods


Name:

  • Thalictrum, from the Greek, qaliktron (thaliktron), name for the European meadowrue Thalictrum minus.
  • venulosum, from the Latin, venosus, "veiny"
  • Common Name from the habitat of some Thalictrum (though not necessarily this one) and rue, from the Anglo-Saxon rúde, and the Peloponnesian Greek `ruth (hrute), a name originally given to Ruta graveolens and later applied to a host of plants with bitter leaves.
  • Other common names include Boundary Meadowrue, Early Meadowrue, Northern Meadowrue

Taxonomy:

  • Kingdom Plantae, the Plants
    • Division Magnoliophyta, the Angiosperms (flowering plants)
      • Class Magnoliopsida, the Dicotyledons 
      • Subclass Magnoliidae
        • Order Ranunculales, the Buttercups
          • Family Ranunculaceae, the Buttercups, with Actaea, the Baneberries, Clematis, Coptis (Gold Thread), Delphinium (Larkspurs), Hepatica, Ranunculus (Buttercups), and Thalictrum (Meadow Rues).
            • Genus Thalictrum, the Meadowrues; about 100 species of perennial herbaceous plants, from the North Temperate Zone, South America, and Africa.
  • Taxonomic Serial Number: 18684
  • Also known as Thalictrum confine, Thalictrum occidentale, Thalictrum turneri

Description:

  • A , ½, , º, é
  • Leaves basal and cauline; cauline 1-3, those proximal to inflorescence petiolate, those subtending panicle branches sessile. Leaf blade 3-4 times thrice compound; leaflets obovate to orbiculate, apically 3-5-lobed, ¼"-¾", lobe margins crenate, surfaces abaxially glabrous or glandular-puberulent.
  • Stem erect, 8"-20", glabrous, from rhizomes.
  • Roots
  • Flowers Inflorescences terminal, panicles, narrow and dense, many flowered.
    • Sepals sepals greenish white, lanceolate or broadly ovate to elliptic or obovate, 2-4 mm; filaments colored, not white, (1.8-)3-5.5 mm; anthers 2-3.5 mm, blunt to mucronate; stigma commonly yellowish.
    • Petals
    • Stamens
    • Pistils
    • Ovary superior (within blossom) inferior (below flower)
  • Fruit an achenes 5-17, erect to spreading, not reflexed, nearly sessile; stipe 0.1-0.3 mm; body often distinctly curved, elliptic-oblong, nearly terete to slightly flattened, adaxial surface 3-4(-6) mm, glabrous to glandular, veins distinct, not anastomosing-reticulate; beak 1.5-2.5(-3) mm.
  • Seed

Identification:

  • Identifiable as
  • Distinguished from
  • Field Marks

Distribution:

  • British Columbia to Québec, north to the Northwest Territories and the Yukon, south to Washington, Oregon, Idaho, Wyoming, Colorado, NW Nebraska, the Dakotas, Minnesota, and western Wisconsin.

Habitat:

  • Prairies, riparian woods, and coniferous, deciduous, and mixed forests

Fire:

Associates:

  • Trees:
  • Shrubs:
  • Herbs:
  • Ground Covers:
  • Mammals:
  • Birds:

History:

Uses:

Reproduction:

  • Sexually by seed
  • Flowers
  • Assexually by

Propagation:

  • By rhizome division,

Cultivation:

  • Hardy to USDA Zone 3 (average minimum annual temperature -40ºF)
  • Cultural Requirements
    • Light:
    • Soil:
    • Water:
    • Spacing:
    • Fertilization:
  • Size 12"-18"W x 12"-18"H
  • Growth rate
  • Good for
  • Cultivars include
    • variety 'Alba', with
  • Cultivars and species available by mail order from specialty suppliers or at local nurseries

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Last Updated on 29 September, 2002