Scientific Name:
Juglans L., Sp. Pl. 997 (1753)
Vernacular Name(s):

Trees; bark fissured. Twigs with lamellate pith. Winter buds with few scales. Lvs aromatic. ♂ catkins pendulous, solitary, situated laterally on previous year's shoots. ♀ fls terminal, few or solitary, in erect spikes. Bracteoles adnate to ovary, not persistent. Fr. a large indehiscent drupe; endocarp woody and often very hard, incompletely 2–4-celled, indehiscent or dividing in 1/2. Seed corrugated, 2–4-lobed, remaining in shell at germination.

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

Number of species in New Zealand within Juglans L.
Exotic: Fully Naturalised2
Exotic: Casual2
Linnaeus, C. 1753: Species Plantarum. Impensis Laurentii Salvii, Stockholm.
Mabberley, D.J. 2008: Mabberley's plant book, a portable dictionary of plants, their classification and uses. Edition 3. Cambridge University Press.