Scientific Name:
Hydrangea macrophylla (Thunb.) Ser. in de Candolle, Prodr. [A. P. de Candolle] 4, 15 (1830)
  • Viburnum macrophyllum Thunb. in Murray, Syst. Veg., ed. 14 (J. A. Murray) 295 (1784)
Vernacular Name(s):
Hydrangea; Lacecap hydrangea; Mophead hydrangea

Deciduous, densely-branched, rounded shrub to 1.5–(3) m high; twigs glabrous and flexible, becoming mottled and brittle. Lvs towards ends of branches on younger wood; petiole short; lamina elliptic to ovate or obovate, (5)–10–20 × (3)–5–15 cm, acuminate, cuneate, coarsely serrate; both surfaces glabrous and greasy, the upper lustrous, the lower dull with a conspicuous network of veins. Corymb broad, flat-topped or convex, much-branched, hairy, up to 20 cm diam., usually largely composed of sterile fls, sometimes with an outer ring of sterile fls and central fls fertile. Sepals of sterile fls petaloid, spreading, broad-elliptic to obovate, 1–2 cm long, pink, blue, white, or greenish. Corolla c. 3 mm diam.; petals minute and incurved, pink or blue. Stamens 10. Ovary enclosed in calyx tube at anthesis, later projecting. Capsule c. 5 mm long.

[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]


Flowering: Nov.–Mar.

de Candolle, A. P. 1830: Prodromus Systematis Naturalis Regni Vegetabilis. Vol. 4. Treuttel et Würtz, Paris.
Howell, C. 2008: Consolidated list of environmental weeds in New Zealand. DOC Research & Development Series 292: 42.
Wilcox, M.; Bradshaw, C.; Cameron, E. 2004: Woody plants of the Auckland Domain. Auckland Botanical Society Journal 59(1): 44–56.