geum, mountain avens
Oncostylus leiospermus (Petrie) F.Bolle
Vascular – Native
Herbs - Dicotyledons other than Composites
The National Vegetation Survey (NVS) Databank is a physical archive and electronic databank containing records of over 94,000 vegetation survey plots - including data from over 19,000 permanent plots. NVS maintains a standard set of species code abbreviations that correspond to standard scientific plant names from the Ngä Tipu o Aotearoa - New Zealand Plants database.
2n = 70
Current conservation status
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2017 using the New Zealand Threat Classification System (NZTCS). This report includes a statistical summary and brief notes on changes since 2012 and replaces all previous NZTCS lists for vascular plants. Authors: By Peter J. de Lange, Jeremy R. Rolfe, John W. Barkla, Shannel P. Courtney, Paul D. Champion, Leon R. Perrie, Sarah M. Beadel, Kerry A. Ford, Ilse Breitwieser, Ines Schönberger, Rowan Hindmarsh-Walls, Peter B. Heenan and Kate Ladley.
2012 | Not Threatened
Previous conservation statuses
2009 | Not Threatened
2004 | Not Threatened
Endemic. New Zealand: North (Mt Egmont, Ruahine Range) South and Stewart Islands
Montane to subalpine, in scrub, bogs, herbfield, tussock grassland, fell field, snowbanks, and streambanks.
Erect herb up to 250 mm tall at flowering, arising from a slender stock. Basal leaves rosulate, up to 120 mm long, sparsely to densely clad in slender white-pilose hairs, pinnate; lateral leaflets in up to 10 pairs, reduced and often minute; terminal leaflet 10-25 mm long, serrate-dentate; cauline leaves few and bract-like, deeply toothed. Peduncle up to 250 mm tall. Scapes up to 250 mm long, simple to sparingly branched, (1-)2-4-flowered, distinctly pubescent, hairs in mixtures of short and long. Flowers 6-9 mm diameter. Petals (1-)5 mm long, white, suborbicular. Receptacle elongate, villous. Achenes numerous, c.2 mm long, narrow-oblong, glabrous, occasionally with a few hairs on shoulder; style minute, glabrous, recurved.
Reduced forms of Geum leiospermum, bearing only one flower are superficially similar to G. pusillum Petrie a species which usually has solitary flowers. From such plants G. leiospermum differs by the hairs of the peduncle which are intermixed (long/short) rather than uniformly short, and also by the lateral leaflets which are usually distinctly more reduced in relation to the terminal leaflet.
November – February
January – April
Hooked achenes dispersed by attachment (Thorsen et al., 2009).
Easily grown in pots in an alpine house, and in cooler climates within a rock garden. Best grown from fresh seed.
geum: Possibly from the Greek geuo ‘to give a pleasant flavour’, the roots of some species being aromatic.
Where To Buy
Not Commercially Available
Description adapted from Allan (1961) and Webb et al. (1988)
References and further reading
Allan, H.H. 1961: Flora of New Zealand. Vol. I. Government Printer, Wellington
Thorsen, M. J.; Dickinson, K. J. M.; Seddon, P. J. 2009. Seed dispersal systems in the New Zealand flora. Perspectives in Plant Ecology, Evolution and Systematics 11: 285-309
Webb, C.J.; Sykes, W.R.; Garnock-Jones, P.J. 1988: Flora of New Zealand. Vol. IV. Naturalised Pteridophytes, Gymnosperms, Dicotyledons. 4. Christchurch, New Zealand, Botany Division, D.S.I.R.