Spiraea stevenii (C. K. Schneider) Rydberg in N. L. Britton et al. (Q4426)

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Spiraea stevenii is a taxon with the rank species within the genus Spiraea
Language Label Description Also known as
English
Spiraea stevenii (C. K. Schneider) Rydberg in N. L. Britton et al.
Spiraea stevenii is a taxon with the rank species within the genus Spiraea

    Statements

    taxon/id/Spiraea stevenii (C.K. Schneider) Rydberg
    0 references
    Spiraea stevenii (C.K. Schneider) Rydberg
    Spiraea stevenii
    (C.K. Schneider) Rydberg
    FNA Editorial Committee. 2014. Flora of North America north of Mexico. Volume 9: Magnoliophyta: Picramniaceae to Rosaceae. Oxford University Press, New York.
    accepted
    spirée de Steven (French)
    Steven's meadowsweet (English)
    beauverd spiraea (English)
    Steven's spiraea (English)
    Alaska or Beauverd's spiraea (English)
    1 reference
    Douglas, G.W., G.B. Straley, D.V. Meidinger & J. Pojar. 1998. Illustrated Flora of British Columbia. B.C. Ministry of Environment, Lands & Parks and B.C. Ministry of Forests. Victoria. Crown Publications. 8 vols.
    1 reference
    Cody, W.J., K.L. Reading & J.M. Line. 2003. Additions and range extensions to the vascular plant flora of continental Northwest Territories and Nunavut, Canada, II. Canadian Field-Naturalist 117: 448-465. http://www.biodiversitylibrary.org/item/109475#page/464/mode/1up
    1 reference
    Porsild, A.E. & W.J. Cody. 1980. Vascular Plants of the Continental Northwest Territories, Canada. National Museum of Natural Sciences, Ottawa, Ont. 667 pp.
    e Asia
    Flowering Jun–Sep; fruiting Jul–Nov.
    meadows
    tundra
    open woods
    thickets
    stream banks
    lake edges
    alpine areas
    Shrubs, 1–10 dm.
    Stems ascending to prostrate, rarely dying to ground, rarely branched.
    Leaves: petiole 0.5–6 mm;
    blade ovate to elliptic, 1–6 × 0.5–2.5 cm, membranous, base obtuse, margins regularly to irregularly serrulate on distal 1/4–1/2 to crenate or entire (long-shoot leaves sometimes serrate on full blade), teeth rounded, number of primary and secondary serrations 0–1 times number of secondary-veins (excluding inter-secondary veins), venation pinnate cladodromous, secondary-veins not prominent, apex obtuse, surfaces glabrous.
    Inflorescences mostly terminal, corymbiform (dense), 1–3 [–5] × 0.5–3 [–5] cm height usually 1 times diam.;
    branches rarely in axils of leaves, usually glabrous or puberulent, sometimes villous.
    Pedicels 1–5 (–8) mm, usually glabrous or puberulent, sometimes villous.
    Flowers 4–6 mm diam.;
    hypanthia hemispheric, 0.7–1 mm, abaxial surface puberulent to pubescent, adaxial glabrate to pubescent;
    sepals triangular, 1–1.5 mm;
    petals white, orbiculate, 1.5–2.5 mm;
    staminodes 10–12;
    stamens 18–22, 2 times petal length.
    Follicles oblanceoloid, 2.5–3.5 mm, puberulent.