Physocarpus
Physocarpus is a plant genus of the rose family ( Rosaceae ).
Description
Physocarpus are unbestachelte, deciduous shrubs whose bark peels off in thin strips. Its leaves are alternate are lobed three times, the non- adult stipules are early lapses.
The inflorescence is a terminal, rounded up seems like consuming grape. The flowers are hermaphroditic and fünfzählig. The flower cup is bell-shaped and open at the top, an outer cup is missing, a discussion is not recognizable. The sepals are contiguous, but not overlapping each other, the petals are white. The stamens are numerous. There are two to five at the base grown together and stamp two to four ovules.
The fruit is a Short-stalked, bloated, big Sammelbalgfrucht that protrudes from the flower cups, the fruits open along the seams. The few seeds have a glossy, hard outer skin.
Dissemination
The genus is found almost entirely in North America with the exception of Physocarpus amurensis in Northeast Asia. It grows mostly on river banks or similar wet locations.
The Schneeballblättrige Ninebark ( Physocarpus opulifolius ) is a common ornamental shrub in Europe and occurs increasingly as a garden refugee.
System
The genus was first described in 1824 by Jacques Cambessèdes as a section of Spiraea and 1838 established by Constantine Samuel Rafinesque as a separate genus. It is classified in the tribe Neillieae the subfamily Spiraeoideae. We distinguish ten species, including:
- Physocarpus alternans
- Physocarpus amurensis
- Physocarpus bracteatus
- Physocarpus capitatus
- Physocarpus glabratus
- Physocarpus malvaceus
- Physocarpus monogynus
- Opulifolius Physocarpus ( Ninebark Schneeballblättrige )
Evidence
- C. Kalkman: Rosaceae. In: Klaus Kubitzki (ed.): The Families and Genera of Vascular Plants - Volume VI - Flowering Plants - Dicotyledons - Celastrales, Oxalidales, Rosales, Cornales, Ericales, 2004, pp. 359, ISBN 978-3-540-06512 - 8