Class
Order
Family
Genus
Classification
Nomenclature
Scientific Name:
Rytidosperma nudum (Hook.f.) Connor & Edgar, New Zealand J. Bot. 17: 322 (1979)
Synonymy:
- ≡ Danthonia nuda Hook.f., Bot. Antarct. Voy. II (Fl. Nov.-Zel.) Part II, 337 (1855)
- ≡ Notodanthonia nuda (Hook.f.) Zotov, New Zealand J. Bot. 1: 112 (1963)
Description
Open small tufts, leafy at ends of elongating shoots, rooting at nodes; leaves somewhat acute, ≈ culms, disarticulating at ligule; branching intravaginal. Leaf-sheath pale stramineous to light grey, glabrous; apical tuft of hairs few, up to 1–2 mm. Ligule to 0.4 mm. Leaf-blade to 8 cm, folded, narrow, rather soft, glabrous. Culm to 10 cm, internodes glabrous. Panicle small, erect, to 3 cm, of few spikelets on short pedicels; rachis and pedicels slender, closely short-scabrid and some longer hairs at branch axils. Spikelets usually 3-flowered, awns barely exserted from glumes. Glumes purplish centrally, ovate, obtuse, ± equal, 3.5–5–(5.7) mm; lower 3–(5)-nerved, upper 3-nerved. Lemma 2.3–3.5 mm, 5–(9)-nerved, upper and lower rows of hairs very sparse, upper row usually of small marginal tufts with a few scattered hairs between, < lemma lobes, lower row of small marginal tufts and few scattered hairs, elsewhere glabrous, margins with scattered hairs; lobes 0.2–0.5 mm, acute to acuminate, not awn-tipped; central awn 1–2 mm, erect, column scarcely developed. Palea 2.4–2.8 mm, reaching base of awn sinus, = upper lemma hairs, interkeel glabrous, margins occasionally with a few long hairs. Callus c. 0.3 mm, a few marginal hairs not reaching lower lemma hairs, or marginal tufts denser, slightly overlapping lower lemma tufts. Rachilla 0.5–0.8 mm. Anthers 0.7–0.8 mm. Caryopsis not seen. Plate 12E.
[From: Edgar and Connor (2000) Flora of New Zealand. Volume 5 (second printing).]
Biostatus
Indigenous (Endemic)
Bibliography
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.; 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. [Not threatened]
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]
Edgar, E.; Connor, H.E. 2010: Flora of New Zealand Volume V Grasses. Edition 2. Manaaki Whenua Press.
Hooker, J.D. 1854–1855: 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 II. Flowerless 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.
