Sorbus sitchensis M. Roemer (Q4397)

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Sorbus sitchensis is a taxon with the rank species within the genus Sorbus
Language Label Description Also known as
English
Sorbus sitchensis M. Roemer
Sorbus sitchensis is a taxon with the rank species within the genus Sorbus

    Statements

    taxon/id/Sorbus sitchensis M. Roemer
    0 references
    Sorbus sitchensis M. Roemer
    Sorbus sitchensis
    M. Roemer
    FNA Editorial Committee. 2014. Flora of North America north of Mexico. Volume 9: Magnoliophyta: Picramniaceae to Rosaceae. Oxford University Press, New York.
    accepted
    Sitka mountain-ash (English)
    Pacific mountain-ash (English)
    western mountain-ash (English)
    sorbier de Sitka (French)
    Shrubs, 10–40 dm.
    bark initially reddish purple to brownish gray, becoming grayish red;
    winter buds red-purple to redbrown, conic to ovoid, 8–13 mm, dull, slightly glaucous, not glutinous, sparsely or densely villous, hairs primarily rufous.
    Leaves pinnately compound;
    stipules persistent, sometimes deciduous, hairs rufous;
    blade paler abaxially, dull blue-green, usually slightly glaucous, rarely faintly shiny adaxially, leaflets 7–13, opposite, sometimes subopposite, oblong to narrowly elliptic, sometimes oblanceolate, ovate, or obovate, 1.8–6 × 0.6–2.5 cm, l/w ratio 1.9–3.5, margins entire or finely to coarsely serrate, sometimes doubly serrate, apex obtuse or acute, surfaces soon glabrous, leaf and leaflet axils hairy, hairs rufous.
    Panicles 12–80-flowered, rounded, 2–8 cm diam.;
    peduncles glabrous, glaucous, or sparsely to densely villous, hairs primarily rufous.
    Pedicels glabrous, glaucous, or sparsely to densely villous, hairs primarily rufous.
    Flowers 11–17 mm diam.;
    hypanthium glabrous, glaucous, hypanthium plus sepals 3–4 mm;
    sepals 1–2.2 mm, margins lightly to moderately ciliate, hairs rufous or whitish, infrequently glandular;
    petals white, rarely pinkish, rhombic to ovate, 4–7.5 mm;
    carpels distinct, apex concave, depressed, or slightly conic and truncate, styles 3–5, 1.5–3.2 mm.
    Infructescences glabrous, glaucous, or villous.
    Pomes pinkish red or red (often appearing slightly purplish), subglobose to broadly elliptic or obovoid, 7–13 × 7–13 mm, dull, glaucous;
    sepals inconspicuous, incurved.
    Seeds redbrown, ovoid to ovoid-lanceolate, oblong or elliptic, 3.4–5 × 2.2–2.9 mm, symmetric or trigonous, slightly flattened.