January 21
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Plant Species of the genus Rhamnus

Information about this genus
Name: Rhamnus
Cultivation: CULTIVATION: Depending on the species, they prefer moist to very dry conditions in full sun or partial shade, in moderately fertile soil. Propagate by sowing seed in autumn, as soon as it is ripe, with protection from winter frosts, or from softwood cuttings of deciduous species in early summer. Half-hardened cuttings can be taken from evergreen species in summer and layering can be done in autumn or spring.
Description: There are more than 125 species within this genus in the family Rhamnaceae. Mostly prickly evergreen or deciduous shrubs or trees, they are found throughout the Northern Hemisphere, with a few species in Brazil, eastern Africa and South Africa, in woodland and heathland areas. Some species will grow on alkaline soil and tolerate the salt-laden air of coastal sites. Green, blue-green and yellow dyes are made from some species, while others such as Rhamnus purshiana, the source of cascara sagrada, are used medicinally as purgatives. The wood is used commercially for turning. This genus is mainly cultivated for its ornamental foliage and decorative berries. The flowers are insignificant, but are attractive to bees; some are fragrant.

Specie Vernacular Zone
alnifolia alderleaf buckthorn
cathartica 3?9
davurica Dahurian buckthorn
frangula 3?9
japonica Japanese buckthorn
lanceolata lanceleaf buckthorn
Rhamnus alaternus 7?10
Rhamnus alpinus 6?9
Rhamnus californica 7?10
Rhamnus crocea 8?10
Rhamnus dahurica 5?9
Rhamnus fallax 6?10
Rhamnus imeretina 6?9
Rhamnus prinoides 9?11
Rhamnus purshiana 7?10
Rhamnus saxatilis 6?9
utilis 6?9

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