Scientific Name:
Plectranthus ecklonii Benth. (1848)
Vernacular Name(s):
Blue spur flower

Erect shrub to nearly 3 m high with stems densely puberulent at first. Petioles to c. 6 cm long, purplish. Lamina 6–17 × 2.5–8 cm, ovate or elliptic-ovate, puberulent, densely so on veins above and generally below, dotted with red or dark red glands on both sides (more obvious when dry), irregularly dentate-serrate; base narrow-cuneate; apex acute. Infl. a loose, erect panicle to c. 30 cm tall, purple, with 2–3 pairs of branches; lower bracts mostly c. 1 cm long, broad-ovate or oblong, dotted with red glands. Pedicels slender, > calyx, almost glabrous or glandular-puberulent. Calyx teeth 3–5 mm long, accrescent, ciliate, dotted with glands; upper tooth ovate, obtuse; lower 4 teeth lanceolate-subulate. Corolla purplish, violet or bluish violet; tube (1)–1.3–1.5 cm long, narrow, glandular-puberulent outside, gradually widening to apex; upper lip ± erect, c. 5 mm long, with 2 rounded lobes; lower lip boat-shaped, horizontal to deflexed. Stamens free at base, the longer lower pair c. 1.5 cm long, becoming exserted. Style 2–2.5 cm long, long-exserted. Nutlets c. 2 mm long, broad-oblong, brown.

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


Flowering: Dec.–May.

Biosecurity New Zealand 2012: Regional Pest Management Strategies Database.
Howell, C. 2008: Consolidated list of environmental weeds in New Zealand. DOC Research & Development Series 292: 42.
Paton, A.J.; Mwanyambo, M.; Govaerts, R.H.A.; Smitha, K.; Suddee, S.; Phillipson, P.B.; Wilson, T.C.; Forster, P.I.; Culham, A. 2019: Nomenclatural changes in Coleus and Plectranthus (Lamiaceae): a tale of more than two genera. PhytoKeys 129: 1–158.