Penaeaceae
A small natural order of much-branched shrubs, confined to South Africa, and of doubtful affinity with any other order. Flowers hermaphrodite, regular, solitary in the upper axils, sub-sessile; perianth Inferior, with an ovoid or cylindrical tube, and a limb of four valvate or reduplicate-margined lobes; stamens four, affixed to the throat; filaments short; anthers continuous with the filaments, erect, two-celled. Capsule included in the persistent perianth. Leaves opposite, numerous, rather small, entire, coriaceous; stipules absent. The order comprises four genera and about a score species, none of which have any known economic value. Examples: Penaea, Sarcocolla.