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Spiraea -
by Gerry Moore
Not peer reviewed
Last modified: 09/08/2006
Nomenclature
Spiraea L., Sp. Pl. 489. 1753. Gen. Pl., ed. 5, 216. 1754. LECTOTYPE: Spiraea salicifolia L., designated by Rydberg (1908).
Key to the species of Spiraea
1. Inflorescences simple, unbranched umbel or umbellike racemes...2
1. Inflorescences compound, branched panicles or corymbs...3
2. Leaves ovate to oblong-lanceolate...Spiraea prunifolia
2. Leaves
linear-lanceolate...Spiraea
thunbergii
3. Inflorescences corymbs, the floriferous part wider than
long...5
3. Inflorescences panicles, longer than broad...4
4. Leaves beneath and inflorescences densely tomentose...Spiraea tomentosa
4. Leaves and inflorecences
nearly or quite glabrous...Spiraea
alba
5. Leaves acute, obtuse, or rounded; flowers usually white...Spiraea betulifolia
5. Leaves
long-acuminate; flowers usually pink...Spiraea japonica
List of Spiraea Species
- Spiraea ×vanhouttei - excluded species
- Spiraea alba
- Spiraea betulifolia - excluded species
- Spiraea japonica
- Spiraea prunifolia
- Spiraea thunbergii - excluded species
- Spiraea tomentosa