Article from Bean's Trees and Shrubs Hardy in the British Isles
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'Berchemia' from the website Trees and Shrubs Online (treesandshrubsonline.
A genus of deciduous, unarmed climbers or shrubs, with alternate leaves prominently and numerously parallel-veined. Flowers small, with five sepals and five petals, and not ornamental. Fruit fleshy, with a two-celled stone. Five species have been introduced: one American, the others Asiatic. They like a good, moist soil and can be propagated by cuttings. Allied to Zizyphus and Paliurus, both of which differ in having three-nerved leaves.