This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
An old favourite for training against walls, formerly known as Corchorus, is the only plant belonging to this genus. Petals 5. Stamens numerous. Carpels 5 to 8, dry and indehiscent, 1-seeded. Named in honour of Mr. Ker, editor of the early volumes of the ' Botanical Magazine.'

Fig. 82. Kerria Japonica, (1/4 nat. size.)
1. K, Japoniea (fig. 82). - A small shrub with slender dark green branches and orange-yellow solitary terminal flowers. The double variety is the only one in general cultivation.
 
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