Scientific Name:
Juglans regia L., Sp. Pl. 997 (1753)
Vernacular Name(s):
Common walnut; English walnut; Walnut

Large tree to over 20 m high, with broad spreading crown. Shoots glabrous, stout, dark, with prominent, Y-shaped lf scars; buds grey, ± finely puberulent. Lvs to c. 55 cm long; petiole and rachis to c. 30 cm long on adult branches. Leaflets 5–9, densely glandular-puberulent when young, becoming glabrous except for axillary hair tufts on undersurface, entire; base cuneate to rounded; apex rounded to acute or cuspidate; lowest pair of leaflets much smaller; terminal leaflet largest. Lamina of terminal leaflet mostly 10–20 × 5–11 cm (sometimes larger on strong vegetative shoots), broad-elliptic or elliptic-obovate. ♂ catkins 5–11 cm long, puberulent. ♀ fls in clusters of 1–3, sessile or subsessile, densely glandular-puberulent; stigmas to 3 mm long, pale green. Fr. 3.5–5 cm long, subglobose, glabrous but gland-dotted, green, not beaked. Shell thick or thin, rugose; sutures thick and easily dividing in 1/2 at maturity. Seed very convoluted.

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


Flowering: Oct.

Edwards, R. 2008: Lincoln University campus – a guide to some of the trees currently growing there. Lincoln University, Lincoln.
Linnaeus, C. 1753: Species Plantarum. Impensis Laurentii Salvii, Stockholm.