Classification
Class
Magnoliopsida Brongn.
Order
Rosales Bercht. & J.Presl
Family
Rhamnaceae
Genus
Pomaderris Labill.
 Nomenclature
Scientific Name:
Pomaderris kumeraho A.Cunn., Ann. Nat. Hist. 3: 248 (1839)
Synonymy:
Typus: [NewZealand,North Island, Bay of Islands]Keri-Keri, at head of boat navigation, Sep 1826, A. Cunningham 36/58 No. 577 (K barcode K000732063; isotypi: FI barcode FI006698, KW barcode KW001003127).
Etymology:
The epithet kumeraho is derived from the Maori name for the plant, Kūmarahou.
Vernacular Name(s):
Golden tainui; Gum-digger's soap; Kūmarahou; Kūmararaunui; Pāpapa
 Description

Erect shrub to 2.5 m high. Adult and juvenile lvs petiolate; lamina 20–80 × 10–40 mm, elliptic to elliptic-ovate; upper surface glabrous except for scattered simple hairs around sunken midrib; lower surface with fine grey stellate tomentum and scattered simple or large stellate hairs on veins; margins entire, not revolute; stipules 2–3 mm long, deciduous. Infl. a much-branched, dense, terminal corymb. Calyx reflexing, pale green; tube with dense, long, white, simple hairy covering until after anthesis. Petals yellow; limb broad. Anthers oblong. Ovary with stellate hairs at apex, almost wholly immersed in calyx tube at anthesis, c. 1/2 immersed at fruiting. Fr. cocci opening by opercula occupying c. 1/2 of their inner faces.

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

 Biostatus
Indigenous (Endemic)
 Phenology

Flowering: Sep.–Oct.

 Bibliography
Cunningham, A. 1839: Florae insularum Novae Zelandiae precursor; or a specimen of the botany of the islands of New Zealand. Annals of Natural History 3: 244–250.
de Lange, P.J.; Rolfe, J.R.; Barkla J.W.; Courtney, S.P.; Champion, P.D.; Perrie, L.R.; Beadel, S.N.; Ford, K.A.; Breitwieser, I.; Schönberger, I.; Hindmarsh-Walls, R.; Heenan, P.B.; Ladley, K. 2018: Conservation status of New Zealand indigenous vascular plants, 2017. New Zealand Threat Classification Series. No. 22. [Not Threatened]
de Lange, P.J.; Rolfe, J.R.; Champion, P.D.; Courtney, S.P.; Heenan, P.B.; Barkla, J.W.; Cameron, E.K.; Norton, D.A.; Hitchmough, R.A. 2013: Conservation status of New Zealand indigenous vascular plants, 2012. New Zealand Threat Classification Series 3. Department of Conservation, Wellington. [Not Threatened]
Heenan, P.B. 2021: Respecting te reo Māori in botanical nomenclature: the use of long vowels replacing tohutō (macrons) and the case of kūmarahou. New Zealand Journal of Botany 59: 1–11.