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Colletia (Philibert Collet, 1643-1718, French botanist). Rhamnaceae. Odd spiny shrubs grown under glass, and in the open in California and other warm regions.
Leaves small and simple (or wanting), opposite: branches short, often flattened, arranged in opposite pairs, thickened, spiny (sometimes called lvs.): fls. small, perfect, yellowish or white, nodding on 1-fld. pedicels, single or fascicled in the axils or beneath the flattened divaricate spines; calyx bell-shaped or tubular, 4-5-parted; petals 4-6 or 0, inserted on the calyx; stamens 4-6; disk joined to calyx-tube, inconspicuous or the margin rolled-in; ovary 3-lobed and 3-celled, standing in the disk, the stigma 3-lobed: fr. a coriaceous dry drupe-like caps.—About a dozen species in S. Amer., mostly in the tropical parts. The colletias are said to start readily from cuttings of half-ripened wood, as well as from seeds. They are to be grown as single or detached specimens, because of their oddity.
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