Physocarpus opulifolius

(Linnaeus) Maximowicz

Trudy Imp. S.-Petersburgsk. Bot. Sada 6: 220. 1879.

Common names: Common or Atlantic nine-bark physocarpe à feuilles d'obier
EndemicIllustrated
Basionym: Spiraea opulifolia Linnaeus Sp. Pl. 1: 489. 1753
Synonyms: Opulaster alabamensis Rydberg O. australis Rydberg O. opulifolius (Linnaeus) Kuntze O. stellatus Rydberg ex Small
Treatment appears in FNA Volume 9. Treatment on page 348. Mentioned on page 349, 388.

Shrubs, to 30 dm. Stems spreading to ascending, ± glabrous. Leaves: stipules narrowly ovate, 6–10 × 1.5–2.5 mm, apex acute; petiole 1–3 cm; blade ovate to obovate, 6–8.5(–10) × 4–7(–10) cm, usually longer than wide, base broadly cuneate to truncate, 3(–5)-lobed, margins irregularly serrate, apex obtuse to rounded, surfaces mostly glabrous, sometimes sparsely hairy abaxially. Inflorescences 30–50-flowered, open, hemispheric racemes, 5 cm diam.; bracts elliptic to spatulate or rhombic, 5 × 2.5 mm, apex acute to 3-fid or coarsely erose, faces glandular. Pedicels 1–2 cm, usually stellate-hairy. Flowers 7–10 mm diam.; hypanthium cup-shaped, 1.5–2 mm, glabrous or sparsely stellate-hairy; sepals pale green to white, darker in center, triangular, 1.5–2.5 mm, apex mucronate, gland-tipped, surfaces usually stellate-hairy; petals white to pale pink, broadly elliptic to orbiculate, 4–5 × 4–5 mm; stamens equal to or exceeding petals, anthers purplish; carpels 3–5, connate basally, sparsely stellate-hairy, glabrescent. Follicles 3–5, connate basally, bright red to brownish red, ovoid, 5–10 mm (lengths ca. 2 times sepals), sparsely stellate-hairy, ± glabrescent; styles 4 mm. Seeds 2(–5), pyriform, 2 mm. 2n = 18.


Phenology: Flowering May–Jun; fruiting Jul–Sep.
Habitat: Rocky stream banks, lake shores, moist woods, swampy ground
Elevation: 0–1300 m

Distribution

V9 572-distribution-map.jpg

N.B., N.S., Ont., Que., Ala., Ariz., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Minn., Miss., Nebr., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Okla., Pa., R.I., S.C., S.Dak., Tenn., Vt., Va., W.Va., Wis., introduced in Europe.

Discussion

Physocarpus opulifolius is the most widespread species in the wild and is commonly cultivated in North America and Europe; it occasionally escapes from cultivation and has become established in parts of Europe.

Selected References

None.

Lower Taxa

None.
... more about "Physocarpus opulifolius"
Crinan Alexander +
(Linnaeus) Maximowicz +
Spiraea opulifolia +
Common or Atlantic nine-bark +  and physocarpe à feuilles d'obier +
N.B. +, N.S. +, Ont. +, Que. +, Ala. +, Ariz. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Vt. +, Va. +, W.Va. +, Wis. +  and introduced in Europe. +
0–1300 m +
Rocky stream banks, lake shores, moist woods, swampy ground +
Flowering May–Jun +  and fruiting Jul–Sep. +
Trudy Imp. S.-Petersburgsk. Bot. Sada +
Endemic +  and Illustrated +
Opulaster alabamensis +, O. australis +, O. opulifolius +  and O. stellatus +
Physocarpus opulifolius +
Physocarpus +
species +