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.
Unarmed shrubs with simple opposite 1- to 5-nerved leaves and small green axillary flowers. Disk none. Sepals 5, persistent, membranous on the margin. Petals 5, hypogynous, shorter than the sepals, fleshy, keeled on the inside. Stamens 10. Carpels 5 to 10, distinct, more or less fleshy, with one pendulous seed in each. The name is from corium, a covering or hide, from the crustaceous carpels.
1. G. myrtifdlia. - This is a handsome shrub from 3 to 6 feet high. Leaves ovate-lanceolate, entire, 3-nerved, glabrous and glaucous; petioles very short. Flowers inconspicuous. A native of the Mediterranean region.