FIG. 261. COMMON BOLETUS (BOLETUS EDULIS).
BOLEUM (from bolos, a ball; in reference to the shape of the seed-pods). ORD. Cruciferæ. An ornamental, hardy, evergreen shrub, well adapted for rockwork, in ordinary soil. It requires slight protection in winter if planted in very exposed situations. Propagated by seed, sown in a pot, in spring, and placed in a frame, or in the open border during summer.
B. asperum (rough).* fl. cream-coloured; racemes erect, elongated; pedicels very short, the lower ones bracteate. April. l. alternate, oblong, linear; lower ones somewhat divided. A suffruticose, erect, branched plant, hispid from stiff hairs. h. 6in. to 1ft. France. 1818.
BOLLEA. See Zygopetalum.
BOLTED. A term used in reference to plants that have prematurely run to seed.
BOLTONIA (named after J. B. Bolton, an English professor of botany). ORD. Compositæ. A genus of rather pretty hardy herbaceous perennials. Flower-heads with white or purplish rays. Leaves pale green, lanceolate, sessile. They thrive in common garden soil. Propagated by divisions of the roots, in March.
B. asteroides (Aster-like).* fl.-heads flesh-coloured, stellate, disposed in a rather large terminal panicle. August. l. all entire, somewhat broadly lanceolate, narrowed at both ends. h. 2ft. North America, 1758. (B. M. 2554.)
B. glastifolia (woad-leaved).* fl.-heads pink. September. l., lower ones serrated. h. 1½ft. North America, 1758. (B. M. 2381.)
