This section is from the book "The Standard Cyclopedia Of Horticulture Vol2", by L. H. Bailey. See also: Western Garden Book: More than 8,000 Plants - The Right Plants for Your Climate - Tips from Western Garden Experts.
(Greek for nut and wing). Ver-benaceae. Ornamental woody plants grown for their lavender-blue flowers profusely produced in autumn.
Deciduous small shrubs: leaves opposite, short-petioled, serrate: flowers in axillary cymes; calyx campanulate, deeply 5-lobed with lanceolate teeth, spreading and somewhat enlarged in fruit; corolla 5-lobed, with short cylindric tube and spreading limb, 1 segment larger and fringed; stamens 4, exserted, 2 of them longer; style slender, 2-parted at the apex: fruit separating into 4 somewhat winged nutlets. - About 6 species in E. Asia.
These are glabrous, pubescent or tomentose shrubs with small blue or violet late flowers. Free-flowering and very valuable for their late blooming season; not hardy North; even if well protected they will be killed almost to the ground, but the young shoots, springing up freely, will flower profusely the same season. They require well-drained and sandy soil and sunny position; if grown in pots, a sandy compost of peat and leaf soil or loam will suit them, and they will flower in the greenhouse until midwinter. Propagated readily by cuttings of half-ripened wood in summer or fall under glass, and by seeds sown in spring.
Miq. (C. Mastacdnthus, Schauer. C. sinensis, Dipp.). Fig. 832. Suffruticose, 1-5 ft.: leaves petioled, ovate or oblong, coarsely serrate, pubescent above, grayish tomentose beneath, 2-3 in. long: cymes peduncled, dense-flowered; flowers small, violet-blue or lavender-blue. Aug. - Nov. China, Japan. B.R. 32:2. B.M. 6799. R.H. 1892:324. R.B. 19:273. G.C. II. 21:149; III. 42:409. Mn. 5:5. S.H. 2, p. 89. G.W. 6, p. 197. Gn. 24, p. 523; 76, p. 24. G.M. 43:7. - Known in the nursery trade as "blue spirea." variety Candida, Schneid. has white flowers
Fig. 832. Caryopteris incana. (X 2/3)
C. mongolica, Bunge. Leaves lanceolate, almost entire: cymes with fewer but larger flowers R.H. 1872:450. Alfred Rehder.