Holodiscus (K. Koch) Maximowicz (Q4411)
Holodiscus is a taxon with the rank genus within the tribe Spiraeeae
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Holodiscus (K. Koch) Maximowicz
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Holodiscus is a taxon with the rank genus within the tribe Spiraeeae
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Statements
taxon/id/Holodiscus (K. Koch) Maximowicz
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Holodiscus (K. Koch) Maximowicz
Holodiscus
(K. Koch) 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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Shrubs, spreading to densely compact, (2–) 3–30 (–60) dm.
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Stems 1–10+, erect to arching;
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bark gray, exfoliating, periderm reddish to nearly black;
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shoots 3 types: long strongly angled or pleated 1st year, short, and water-sprout;
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glabrous, glabrate, downy, canescent, or pilose-tomentose.
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Leaves deciduous, cauline, alternate, dimorphic with shoot type, those of short-shoots in fascicles of 3–8, simple;
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petiole absent or present, distinct, sometimes obscured by decurrent leaf base;
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blade ± ovate, rhombic, trullate to broadly trullate, broadly obovate, or obtrullate, 1–10 cm, membranaceous to chartaceous, sometimes coriaceous, margins flat, usually serrate, sometimes doubly serrate, venation pinnate, simple-craspedodromous, abaxial surface glabrous, glabrate, pilose to villous, tomentose, or sericeous, sometimes sessile or stipitate-glandular, granular deposits present or absent, adaxial glabrous, glabrate, puberulent, pubescent, short-hirsute, velutinous, villous, sessile or stipitate-glandular or eglandular.
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Inflorescences terminal on long-shoots, erect or pendulous, 10–100+-flowered, panicles, glabrate, puberulent, villous, or tomentose hairs golden, tan, or white, stipitate or sessile-glandular or absent;
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bracts absent or subtending inflorescence branches;
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bracteoles present.
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Pedicels present.
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Flowers appearing after leaves, 2–6 mm diam.;
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epicalyx bractlets 0;
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hypanthium patelliform to shallowly crateriform, 1.5–5 mm diam.;
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sepals 5, erect to spreading or slightly reflexed, triangular to elliptic-ovate or deltate;
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petals 5, usually white, sometimes pink-tinged, rarely pink, ovate to elliptic;
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stamens 15–20, equal to or longer than petals, with prominent, raised nectar disc proximal to inner rim, exterior puberulent to tomentose, sometimes sessile-glandular;
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torus inconspicuous;
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carpels 5, adnate to hypanthium base, hirsute and hispid, styles terminal, stigmas 2-lobed;
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ovules 2 (1 aborted).
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Fruits aggregated achenes, 5, laterally flattened, inverted dolabriform, with abaxial edge strongly convex, adaxial straight, 1–1.5 mm, hispid, hirsute, and often sessile or stipitate-glandular;
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hypanthium persistent;
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sepals persistent, erect;
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trullate
broadly trullate broadly obovate or obtrullate
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trullate
broadly trullate broadly obovate or obtrullate
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trullate
broadly trullate broadly obovate or obtrullate
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patelliform
shallowly crateriform
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spreading or slightly reflexed
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triangular
elliptic-ovate or deltate
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