Class
Order
Family
Genus
Classification
Nomenclature
Scientific Name:
Lachnagrostis leptostachys (Hook.f.) Zotov, Rec. Domin. Mus. 5: 143 (1965)
Synonymy:
- ≡ Agrostis leptostachys Hook.f., Bot. Antarct. Voy. I. (Fl. Antarct.) Part I, 94 (1845)
- = Deyeuxia forsteri var. micranthera Hack., Man. New Zealand Fl. 869 (1906) nom. illeg.
Description
Pale green, erect tufts, 15–35–(65) cm, with numerous, narrow, involute leaves often overtopping the lax, delicately branched panicles; branching intravaginal. Leaf-sheath membranous with few, distinct ribs, smooth or scabrid above, pale green to very light brown. Ligule 2–4.5 mm, oblong, very slightly tapered above, truncate, denticulate, abaxially ± scabrid, especially near base. Leaf-blade 3.5–10–(15) cm × 1–2 mm, often involute and 0.5–1 mm diam., abaxially sparsely to closely finely scabrid, adaxially ribbed and closely ciliate-scabrid on ribs; margins finely scabrid, tip acute. Culm 3–18 cm, often included within leaf-sheaths, internodes finely scabrid. Panicle (3)–7–16 × 2–12 cm, very lax; rachis finely scabrid, branches capillary, finely scabrid, tipped by few spikelets. Spikelets 4.5–5.5–(6.5) mm, light green. Glumes ± equal, lanceolate, acute to acuminate, green and submembranous, usually sparsely scabrid especially above, midnerve with sparse prickle-teeth except near base, margins hyaline, sparsely scabrid near tip. Lemma 2.5–3 mm, c. ½ length of glumes, 5-nerved, with soft hairs scattered almost throughout except at tip, elliptic, truncate, lateral nerves shortly excurrent; awn 4–6 mm, straight or ± curved, ± middorsal, or from upper ⅓ of lemma. Palea c. ½-⅔ length of lemma, elliptic, nerves not evident, margins with 1–2 minute hairs, apex very shallowly notched. Callus hairs ± dense, especially below lemma margins, fine, to c. 1 mm, ¼-⅓ length of lemma. Rachilla prolongation to 0.5 mm with fine hair tuft to 1 mm; or 0. Lodicules c. 1 mm, narrow-lanceolate, acute. Anthers (0.6)–0.8–1.2 mm. Caryopsis c. 1.5 × 0.5 mm.
[From: Edgar and Connor (2000) Flora of New Zealand. Volume 5 (second printing).]
Biostatus
Indigenous (Endemic)
Bibliography
Cheeseman, T.F. 1906: Manual of the New Zealand Flora. Government Printer, Wellington.
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]
Edgar, E. 1995: New Zealand species of Deyeuxia P.Beauv. and Lachnagrostis Trin. (Graminieae: Aveneae)*. New Zealand Journal of Botany 33: 1–33.
Hooker, J.D. 1844–1845: 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. I. Flora Antarctica. Part I. Botany of Lord Auckland’s Group and Campbell’s Island. Reeve, Brothers, London.
Zotov, V.D. 1965: Grasses of the Subantarctic Islands of the New Zealand Region. Records of the Dominion Museum, Wellington 5: 101–146.
