B. frondosa (leafy). fl. 2in. long. l., leaflets roundish, obtuse, or emarginate, rather velvety beneath. Branches pubescent. h. 40ft. India, 1796. (B. F. S. 176.)
B. superba (superb).* l., leaflets roundish, obtuse, velvety beneath. Branches glabrous. Coromandel, 1798. This approaches the preceding species, from which it differs mainly by its scandent habit, and not by any botanical characters. (B. F. F. 143.)
BUTOMACEÆ. An order of aquatic plants, now usually included under Alismaceæ.
BUTOMUS (from bous, an ox, and temno, to cut; in reference to the sharp leaves, which injure the mouths of cattle that browze upon them). Flowering Rush. ORD. Alismaceæ. A very handsome hardy perennial aquatic, of extremely easy culture on the margins of ponds or muddy banks. Propagated by divisions of the roots, in spring.
FIG. 304. BUTOMUS UMBELLATUS, showing Habit and single Flower.
B. umbellatus (umbelled).* fl. rose-coloured, umbellate; pedicels with scariose sheathing bracts at the base; scape naked, terete, longer than the leaves. Summer. l. all radical, 2ft. to 3ft. long, linear, acuminate, triquetrous. Ditches and ponds; frequent in England, and rare in Ireland. See Fig. 304.
BUTTER AND EGGS. The double-flowered variety of Narcissus aurantius (which see).
BUTTER AND TALLOW TREE. See Pentadesma.
BUTTER-BUR. See Petasites vulgaris.
BUTTERCUPS. See Ranunculus.