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, persistent, and wing; referring to the wing-like calyx-lobe, persistent on the fruit). Rubiaceae. Ornamental tree grown for its large leaves and the handsome flowers.
Deciduous: leaves opposite, petioled, with caducous stipules, entire: flowers in many-flowered terminal panicles; calyx small, 5-parted, deciduous, in some flowers 1 lobe leafy and changed into a petioled, oblong, obtuse whitish If. persistent on the fruit; corolla campanulate-funnelform, tomentulose outside, with a narrow tube and 5 ovate lobes pubescent inside; stamens 5, included; ovary inferior, 2-celled; style filiform, not exceeding the stamens: fruit a spindle-shaped 2-celled caps., with numerous irregularly winged seeds. - One species in Cent. China. A tall tree, with large elliptic leaves and showy yellow flowers in many-flowered dense terminal panicles. It will succeed in warmer temperate regions only and is yet little known in cultivation, as it has been only recently introduced Prop, is by seeds and possibly by softwood cuttings under glass.
Henryi, Oliver. Tree, to 40 ft., quite glabrous: leaves chartaceous, elliptic, acute, cuneate at the base, entire, 4-6 in. long; petiole 1-2 in. long: flowers in many-flowered panicles, yellow, about 1 in. long: caps, spindle-shaped, about 1 3/4 in. long, often at the apex with a persistent enlarged wing-like calyx-lobe 1 1/2-2 in. long on a petiole of equal length. Cent. China. H.I. 19:1823.