A modern reference to temperate woody plants, including updated content from this site and much new material, can be found at Trees and Shrubs Online.




A genus of some 200 species of trees, shrubs, and herbs, inhabitants mainly of the tropics and subtropics. It belongs to a group of the Mallow family in which the carpels of the ovary are completely united and the fruit a capsule.

From the Supplement (Vol. V)

H. syriacusDiana’ is considered to be an improvement on ‘W. R. Smith’. It is a triploid, with large, waxy, wide-opened, wavy-edged flowers, borne freely in autumn, and dark green leaves. Upright habit to about 8 ft high and 5 ft wide. Raised in the United States National Arboretum and distributed in 1963.

Species articles