Exochorda
| Exochorda | ||||||||||||
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Exochorda racemosa |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Exochorda | ||||||||||||
| Lindl. |
Exochorda is a plant kind from the family of the rose family (Rosaceae).
description
Exochorda species are unprinced, deciduous shrubs . Their leaves are alternate, simple, entire or toothed on the edge, stipules are present.
The inflorescence is a terminal raceme , the large flowers are five, rarely four-fold. The flower cup is bell-shaped or, conversely, cone-shaped, an outer cup is missing. The sepals lie on top of each other like roof tiles, the petals are white.
The fifteen to thirty stamens are in groups of three to five in front of the petals and are separated by larger spaces. The clearly developed disc is crown-shaped. The five carpels are not overgrown with the flower cup, but laterally together. The scars are widened. There are two ovules that run parallel to one another and hang down from the tip .
The fruit is a pelvic fruit made up of five individual follicles with a woody pericarp and one or two seeds per follicle. The number of chromosomes is 2n = 16.
distribution
Exochorda occurs in Asia from Siberia to China and Korea to Japan.
Systematics
The genus was first described by John Lindley in 1858 . It is classified in the tribe Osmaronieae, Supertribus Kerriodae of the subfamily Spiraeoideae . A distinction is made between about four species, which some authors also summarize as subspecies of a species Exochorda racemosa :
- Exochorda giraldii Hesse
- Exochorda korolkowii Lavallée
- Exochorda racemosa (Lindl.) Rehder
- Exochorda serratifolia S. Moore
proof
- C. Kalkman: Rosaceae. In: Klaus Kubitzki (Ed.): The Families and Genera of Vascular Plants - Volume VI - Flowering Plants - Dicotyledons - Celastrales, Oxalidales, Rosales, Cornales, Ericales. Springer-Verlag , Berlin 2004, pp. 354-355, ISBN 978-3-540-06512-8
