Spiraea
Spiraea salicifolia, Illustration
The Spier shrubs ( Spiraea ) is a plant genus in the subfamily Spiraeoideae from the rose family ( Rosaceae ). There are around 80 species. The botanical genus name refers to the often twisted fruits of Greek Speira = winds, Swirl.
Description
Spier shrubs are hardy, deciduous, deciduous shrubs. The change-constant leaves are simple and usually short-stalked. The leaf margins are usually sawed, serrated or lobed, rarely smooth. Stipules absent.
Many flowers are borne in inflorescences may be differently: either in dense panicles, umbrella-, screen grapes or umbels. The radial symmetry, five-fold, small flowers are usually bisexual, rarely unisexual. There are five sepals present. The five petals are mostly white, more rarely reddish. The petals are usually longer than the sepals. Per flower, there are many (15 to 60) stamens. The most five (rarely three to eight) carpels are free. The follicles contain many tiny seeds.
Occurrence
The home of the species are mainly in the temperate zone of the northern hemisphere. She also occur at higher elevations of the subtropics. 70 species occur in China, of which 47 are endemic.
System
Spiraea is the eponymous and most species-rich genus of the tribe and subfamily Spiraeeae Spiraeoideae within the rose family ( Rosaceae ). She is a monophyletic genus and comprises around 80 species. The traditional, based on the inflorescence types subdivision into three sections is not supported by molecular genetic studies.
Some of the types:
- Spiraea alba
- Spiraea amoena
- Spiraea arcuata
- Spiraea soon scatterbrained anica
- Spiraea bella
- Spiraea betulifolia
- Spiraea blumei
- Spiraea calcicola
- Spiraea cana
- Spiraea canescens
- Spiraea cantoniensis
- Spiraea chamaedryfolia
- Spiraea crenata
- Spiraea decumbens
- Spiraea densiflora
- Spiraea douglasii
- Spiraea gemmata
- Spiraea henryi
- Spiraea hypericifolia
- Spiraea japonica
- Spiraea latifolia
- Spiraea lobata
- Spiraea longigemmis
- Spiraea media
- Spiraea micrantha
- Spiraea miyabei
- Spiraea mollifolia
- Spiraea nervosa
- Spiraea nipponica
- Spiraea prunifolia
- Spiraea pubescens
- Spiraea rosthornii
- Spiraea salicifolia
- Spiraea sargentiana
- Spiraea thunbergii
- Spiraea tomentosa
- Spiraea trichocarpa
- Spiraea trilobata
- Spiraea veitchii
- Spiraea virginiana
- Spiraea wilsonii
- Spiraea yunnanensis
Swell
- Description in the Flora of China. (English )