Colebrookia
(named after Henry Thomas Colebrooke, F.R.S., F.L.S., &c., an accomplished botanist). ORD. Labiatae. This genus contains only the two plants described below, and these probably are but forms of one species. Greenhouse evergreen shrubs, densely clothed with whitish or sub-rufous woolly tomentum. Flowers white, small; corolla tubular, contracted in the middle; cymes of whorls distinct, head-formed, dense, sessile. Leaves petiolate, oblong-elliptic, crenulated. Spikelets 1in. to 3in. long, pedunculate, panicled. They thrive in a compost of one part peat and two parts loam, with a small quantity of sand added, to keep the whole porous. Cuttings of half-ripened shoots, made in April or May, will root in sand, under a bell glass.
C. oppositifolia (opposite-leaved). Branches, leaves, and spikes opposite. h. 3ft. to 4ft. Nepaul, 1820. (S. E. B. 115.) C. ternifolia (ternate-leaved). Branches, leaves, and spikes three in a whorl. Leaves more tomentose, and on shorter petioles, than in the first species, and spikelets more dense. India, 1823.