Classification
 Nomenclature
Scientific Name:
Carex ophiolithica de Lange & Heenan, New Zealand J. Bot. 35 (1997)
 Description

Tufts erect, weakly caespitose to caespitose, slender; rhizomes short, ascending, and slender, culms bulbous at base. Leaves 200-400(-600) × 1.8-3.2 mm, soft, ascending, double-folded, green to verdant-green; margin scabrid, weakly rasping but not harsh; keel on abaxial face glabrous, keels of the folds on adaxial face weakly scabrid. Culms 150-400(-920) × 0.5- 1.2 mm, erect, glabrous in lower part, glabrous or weakly scabrid in upper part, trigonous, shorter or longer than the leaves when mature; basal sheaths to 20 mm long, pale brown to straw coloured, nerves distinct. Inflorescence spikes 3-5, to 40 mm long and 3—4 mm wide, erect; upper spikes ± approximate, lower l(-2) spikes distant; peduncles 2-5(-25) mm long; spikes subtended by narrow leaf-like bracts much longer than the spikes; terminal spike male, often with a few female florets in proximal part, female spikes slender and with 10-60 florets, florets overlapping but not crowded. Glumes 1.5—2.0 × 1.4- 2.0 mm, much shorter than utricles, glumes ovate, oblong, light green to pale brown, membranous, deciduous, with two lobes at apex, midrib light green to pale brown; awn 0.5-1.5 mm long, scabrid. Utricles 3.0-4.0 × 1.4-1.5 mm, narrow ovoid, elliptic, plano-convex or subtrigonous, pale green to olive green when immature, usually pale brown or purple brown when mature, surface usually distinctly reticulate when dry (× 20 magnification), nerves pale and distinct, margins smooth; beak 0.5-0.7 mm long, pale, margin entire, crura 0.2-0.3 mm long; stipe 0.3-0.4 mm long. Stigmas 3. Nut 2.4-2.5 × 1.1- 1.3 mm, trigonous, ovoid, dark brown to grey brown, crowned with persistent style base. FL Jul-Jun; FT Jul-Jun.

[Reproduced from de Lange & Heenan (1997, New Zealand J. Bot. 35: 429-436) with permission from The Royal Society of New Zealand.]

 Biostatus
Indigenous (Endemic)
 Bibliography
de Lange, P.J.; Heenan, P.B. 1997: Carex ophiolithica (Cyperaceae): a new ultramafic endemic from the Surville Cliffs, North Cape, New zealand. New Zealand Journal of Botany 35: 429–436.
de Lange, P.J.; Norton, D.A.; Courtney, S.P.; Heenan, P.B.; Barkla, J.W.; Cameron, E.K.; Hitchmough, R.; Townsend, A.J. 2009: Threatened and uncommon plants of New Zealand (2008 revision). New Zealand Journal of Botany 47: 61–96. [Naturally uncommon]
de Lange, P.J.; Norton, D.A.; Heenan, P.B.; Courtney, S.P.; Molloy, B.P.J.; Ogle, C.C.; Rance, B.D. 2004: Threatened and uncommon plants of New Zealand. New Zealand Journal of Botany 42(1): 45–76.
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. [Naturally Uncommon]
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. [Naturally Uncommon]