Scientific Name:
Rytidosperma setifolium (Hook.f.) Connor & Edgar, New Zealand J. Bot. 17: 316 (1979)
  • Danthonia semiannularis var. setifolia Hook.f., Bot. Antarct. Voy. II. (Fl. Nov.-Zel.) Part I, 304 (1853)
  • Danthonia setifolia (Hook.f.) Cockayne (1921)
  • Notodanthonia setifolia (Hook.f.) Zotov, New Zealand J. Bot. 1: 108 (1963)
  • = Danthonia semiannularis var. alpina Buchanan, Indig. Grasses of N. Z. t. 34 (2) A (1879)
Vernacular Name(s):
Bristle tussock; Mountain danthonia

Stiff, yellow-green or bright green tussocks, often with tufts of leaves at ends of elongating shoots, rooting at nodes; leaves semi-pungent, ≤ culms (occasionally very much shorter), disarticulating at ligule; branching intravaginal. Leaf-sheath pale stramineous, glabrous; apical tuft of hairs (0.2)–1.0–3.0 mm. Ligule 0.2–0.8 mm. Leaf-blade to 25–(35) cm, stiff, inrolled, rounded, glabrous, margins glabrous. Culm to 50 cm, internodes glabrous. Panicle ± erect, to 6 cm, of few large spikelets on very slender pedicels; rachis and pedicels almost glabrous or with a few scattered prickle-teeth usually along edges and below spikelets, a few long hairs at branch axils. Spikelets (3)–4–6-flowered, awns exserted from glumes. Glumes becoming light red-purple to purple-black centrally, lanceolate, subobtuse to acute, (5.5)–7–11–(20) mm, ± equal; lower 3–5-nerved, upper (3)–5–(7)-nerved. Lemma (2)–2.5–3.5–(4) mm, 7–9-nerved, upper and lower rows of hairs continuous, upper row slightly < lemma lobes, lower row usually reaching to base of upper row, glabrous elsewhere but occasional hairs centrally, margins often hair-fringed; lobes (2.3)–3–4–(5) mm, tapering to short fine awn; central awn 8–12 mm, widely divergent, column 1–2 mm usually < upper lemma hairs. Palea 3–5 mm, ≥ upper lemma hairs, interkeel glabrous or occasional scattered short hairs, margins with long hairs below or glabrous. Callus c. 0.5 mm, short marginal hair tufts overlapping lower lemma hairs. Rachilla 0.6–1 mm, occasionally crowned with minute hairs. Anthers (1.2)–1.5–3 mm. Caryopsis 1.1–1.5 × 0.6–0.7 mm; embryo 0.5–0.8 mm; hilum 0.2–0.3 mm. 2n= 24. Plates 6A, 11E.

[From: Edgar and Connor (2000) Flora of New Zealand. Volume 5 (second printing).]

Indigenous (Endemic)
Buchanan, J. 1878: The Indigenous Grasses of New Zealand. Vol. Part I & II. Wellington, N.Z.
Connor, H. E.; Edgar, E. 1979: Rytidosperma Steudel (Notodanthonia Zotov) in New Zealand. New Zealand Journal of Botany 17: 311–337.
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]
Hooker, J.D. 1852–1853 ("1853"): The Botany of the Antarctic Voyage of H.M. Discovery Ships Erebus and Terror in the Years 1839–1843, under the command of Captain Sir James Clark Ross. II. Flora Novae-Zelandiae. Part I. Flowering plants. Lovell Reeve, London.
Zotov, V.D. 1963: Synopsis of the grass subfamily Arundinoideae in New Zealand. New Zealand Journal of Botany 1: 78–136.