Description
Osmanthus – x Osmarea – Siphonosmanthus –
There are about 30 species of slow growing, evergreen shrubs and small trees in this genus. They occur in woodland in Asia, Pacific Islands, and Southern USA. They are grown for their foliage and flowers. The leaves are lance shaped to ovate and thick, rigid leaves which may be edged with stout, even hooked, spiny teeth, held in opposite pairs. The small, tubular, 4 lobed, usually fragrant, white, occasionally yellow or orange flowers are held mainly aaxillary cluster or terminal panicles. The flowers are usually followed by ovoid, blue-black fruits. Osmanthus species and cultivars are ideal for a shrub border or woodland garden, O. delavayu may be wall trained. O. x burkwoodi, O. delavayi, and O. heterophyllus are very good for hedging and topiary.
Grow in moderately fertile, will drained, neutral to acid soil in sun or partial shade, whit shelter from winter sun and wind.
Prone to black mildew, anthranose, olive knot, Verticillium wilt, root rot, and scale insects.
O. x burkwoodi – x Osmarea x burkwoodii – This dense, rounded shrub is a cross between O. decorus and O. delavayii and grows 6-10′ feet tall and wide. It produces oval to ovate, slightly toothed, leathery, glossy, dark green leaves, to 2″ long. In late spring it bears small, tubular, very fragrant white flowers, the lobes to 1/4″ across are profusely borne in small, axillary clusters. It seldom produces fruit. Prefers alkaline or chalky soil.
Zones 7-9
