Article from Bean's Trees and Shrubs Hardy in the British Isles
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'Pachygone laurifolia' from the website Trees and Shrubs Online (treesandshrubsonline.
Treated by Bean as Cocculus laurifolius. Lian et al. (2020) found Cocculus as traditionally understood to be polyphyletic, distributed between three different clades. This was resolved by moving several species into the resurrected genus Nephroia, and this species to Pachygone as P. laurifolia.
An evergreen shrub 10 ft or more high, sometimes a small tree, with lance-shaped, conspicuously three-ribbed leaves 5 to 8 in. long, about 2 in. wide, the stalks 3⁄4 in. long; they are of a very glossy, varnished, dark green, giving to the shrub a very characteristic aspect. Flowers small, in axillary panicles.
At Kew this plant can only be grown against a wall, where it lived for many years without injury. In the south of France and Italy it forms a picturesque spreading shrub or small tree. Native of the Himalaya.