Spiraea tomentosa var. tomentosa

WeedyIllustratedEndemic
Synonyms: Spiraea glomerata Rafinesque S. parvifolia Rafinesque
Treatment appears in FNA Volume 9. Treatment on page 403.

Inflorescences 300–15,000+-flowered, flowers or fruits 12–20 per cm of branches. Pedicels 0.1–0.5 mm. 2n = 36.


Phenology: Flowering Jul–Sep; fruiting Aug–Oct.
Habitat: Wetlands, woodland borders with moist acidic soil
Elevation: 0–400 m

Distribution

V9 673-distribution-map.jpg

N.B., N.S., Ont., P.E.I., Que., Conn., Del., Maine, Md., Mass., N.H., N.J., N.Y., Pa., R.I., Vt., Va., W.Va., introduced in n, c Europe.

Discussion

Forms with white petals have been identified as forma albiflora Macbride; plants with rose petals are assigned to forma tomentosa. The chromosome count of 2n = 36 by J. T. Baldwin (1951) was for forma albiflora.

Selected References

None.

Lower Taxa

None.
Richard Lis +
Linnaeus +
N.B. +, N.S. +, Ont. +, P.E.I. +, Que. +, Conn. +, Del. +, Maine +, Md. +, Mass. +, N.H. +, N.J. +, N.Y. +, Pa. +, R.I. +, Vt. +, Va. +, W.Va. +, introduced in n +  and c Europe. +
0–400 m +
Wetlands, woodland borders with moist acidic soil +
Flowering Jul–Sep +  and fruiting Aug–Oct. +
Weedy +, Illustrated +  and Endemic +
Spiraea glomerata +  and S. parvifolia +
Spiraea tomentosa var. tomentosa +
Spiraea tomentosa +
variety +