Scientific Name:
Juncus L., Sp. Pl. 325 (1753)
Vernacular Name(s):
Bog rush; Kōpūngāwhā; Kōpūpūngāwhā; Rush; Wī; Wīwī

Annual or perennial herbs, tufted or rhizomatous, glabrous. Leaves flat and grass-like, or tubular or laterally compressed with internal septa, or channelled, or terete and stem-like, or reduced to basal sheaths. Inflorescence a many-flowered cyme, much-branched or condensed to a compact head, or flowers rarely few or solitary. Flowers usually hermaphrodite, sessile or pedicellate. Tepals 6, rarely 4, lanceolate, the outer usually longer, slightly more rigid with narrow membranous margin, inner with broader membranous margin. Stamens 6, 3, or variable 3–6. Ovary unilocular, or triseptate, or trilocular. Seeds numerous, often tailed at one or both ends.

[From:  Healy and Edgar (1980) Flora of New Zealand. Volume 3.]

Indigenous (Non-endemic)
Number of species in New Zealand within Juncus L.
Indigenous (Endemic)3
Indigenous (Non-endemic)15
Exotic: Fully Naturalised30
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.