Holodiscus discolor (Pursh) Maximowicz (Q4412)
Holodiscus discolor is a taxon with the rank species within the genus Holodiscus
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Holodiscus discolor (Pursh) Maximowicz
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Holodiscus discolor is a taxon with the rank species within the genus Holodiscus
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Statements
taxon/id/Holodiscus discolor (Pursh) Maximowicz
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Holodiscus discolor (Pursh) Maximowicz
Holodiscus discolor
(Pursh) Maximowicz
FNA Editorial Committee. 2014. Flora of North America north of Mexico. Volume 9: Magnoliophyta: Picramniaceae to Rosaceae. Oxford University Press, New York.
accepted
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holodiscus à feuilles discolores (French)
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CA-BC
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US-AZ
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US-CA
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US-CO
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US-ID
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US-MT
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US-NM
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US-NV
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US-OR
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US-TX
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US-UT
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US-WA
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US-WY
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Shrubs, erect to arching, 5–50 (-60) dm.
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Stems: long-shoots (predominant in moist or shaded conditions) (4–) 10–200 cm, 1st year strongly angled or pleated, green to reddish, glabrate to off-white or gray downy or tomentose, rarely sessile or stipitate-glandular, 2d or 3d year epidermis exfoliating, periderm shiny maroon or reddish, aging into light to dark gray bark;
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short-shoots (not predominant) 0.5–2 cm, developing more frequently in xeric or exposed conditions, rarely in moist or shaded ones;
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water-sprout shoots uncommon, 20–150 cm.
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Leaves: petiole 0.5–3 cm, distinct, sometimes ± obscured by decurrent leaf base;
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blade maximal width usually proximal to middle, membranaceous to chartaceous, rarely coriaceous, margins serrate;
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long-shoots (usually predominant): blade ± ovate, rhombic, or ± trullate, 1–10 × 0.5–8 cm, membranaceous to chartaceous, base truncate to cuneate, margins serrate, secondary teeth frequent, primary and secondary-veins slightly to strongly protruding abaxially, venation percurrent, apex acute or obtuse, abaxial surfaces pilose to villous, sometimes sessile-glandular, adaxial glabrate or pubescent to hirsute, eglandular, rarely sessile-glandular;
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short-shoots (usually not predominant): in fascicles of 3–8, blade ± ovate, base truncate, apex obtuse, or slightly ovate to obovate or rhombic, base cuneate, decurrent, apex acute, 1–8 × (0.5–) 1–7 cm, margins serrate, secondary teeth frequent or rare, sharply acute, small, 1–3 mm, primary and secondary-veins usually strongly protruding abaxially, venation percurrent, abaxial surfaces glabrate to densely tomentose or villous, sometimes sessile-glandular, adaxial glabrate to thinly puberulent, rarely sessile-glandular;
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water-sprout shoots: blade (3–) 4–8 × 3–7 cm.
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Inflorescences 10–100+-flowered, 2–20 × 2–15 cm;
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branches usually tomentose to villous, sometimes glabrate, sometimes sessile-glandular;
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bracts absent, sometimes subtending branches (more frequent on basal branches, reducing distally), rarely subtending peduncles;
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bracteoles 0.5–1.5 mm.
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Flowers 2–6 mm diam.;
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hypanthium 3–5 mm diam.;
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sepals triangular-ovate to elliptic-ovate, 1–2 mm, apex acute, abaxially puberulent to tomentulose, usually eglandular;
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petals white, sometimes pink-tinged, rarely pink, ± ovate, 1.5–2 mm;
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stamens equal to or longer than petals, 2–3.5 mm;
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carpels 1–1.5 mm.
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Achenes beige to white, sparsely to densely hirsute, edges and remnant style usually hispid-ciliate, glands 0–15 per face, sessile or stipitate.
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obscured
sometimes more or less
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protruding
slightly to strongly; abaxially
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protruding
usually strongly; abaxially
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