Scientific Name:
Pentapogon avenoides (Hook.f.) P.M. Peterson, Romasch. & Soreng in Peterson et al., J. Syst. Evol. 60: 17 (online) (2022)
  • Agrostis avenoides Hook.f., Handb. New Zealand Fl. 330 (1864)
  • Deyeuxia avenoides (Hook.f.) Buchanan, Indig. Grasses N. Zeal. add et corrig. 11 (1880)
  • Calamagrostis avenoides (Hook.f.) cockayne, Rep. Bot. Survey Tongariro Natl. Park (1908)
  • = Deyeuxia avenoides var. brachyantha Hack. in Cheeseman, Man. New Zealand Fl. 871 (1906)

Dark green to grey-green usually slender tufts, (12)–20–110 cm; branching extravaginal. Leaf-sheath firmly membranous, obviously ribbed, smooth, or rarely scabrid near ligule, brownish, sometimes purplish. Ligule 0.5–4.5 mm, truncate or tapered, ciliate, abaxially with very minute hairs. Leaf-blade (2)–4–15–(24) cm × 0.3–1.5 mm diam., inrolled, abaxially smooth, very rarely scabrid, adaxially scabrid, margins scabrid, tip acute, scabrid. Culm (7.5)–15–75 cm, varying in diameter, usually 0.3–0.5 mm diam. in plants with cleistogamous flowers and 0.8–2.5–(3) mm diam. in plants with chasmogamous flowers, erect or curved upwards from decumbent base, internodes glabrous. Panicle (1)–3.5–20–(28) cm × 1.5–17 mm, erect or ± nodding, shining, lanceolate, cylindric above, narrowly branched with spikelets densely crowded throughout, lower branches ± distant; rachis smooth, branches and pedicels sparsely scaberulous. Spikelets 3–7 mm, 1–(2)-flowered, light green to purplish green. Glumes 1-nerved, lanceolate, acute to acuminate, smooth, midnerve minutely scabrid in upper ⅔. Lemma 2.8–5.3 mm, ⊬ glumes, firmly membranous, minutely scabrid-papillose, narrow elliptic-lanceolate, involute, apex acute or occasionally finely bifid; awn 4.5–8.5 mm, from lower ⅓ of lemma and overtopping glumes. Palea ⊬ lemma, keels scabrid in upper ⅔, tip acute to subacute. Callus hairs few, to c. 1 mm, ⅕-⅓ length of lemma or shorter. Rachilla prolongation (0.5)–0.8–1.5–(2) mm, tipped by an almost equally long, slender tuft of fine hairs reaching to ⅔ length of lemma. Lodicules 0.5–1 mm, ovate-lanceolate, subacute. Anthers 0.2–0.7–(1.2) mm in cleistogamous flowers, (0.5)–0.8–1.4–(2) mm in chasmogamous flowers. Caryopsis 1.5–2.3 × 0.4–0.9 mm.

[From: Edgar and Connor (2000) Flora of New Zealand. Volume 5 (second printing). as Deyeuxia avenoides (Hook.f.) Buchanan]

Indigenous (Endemic)
Buchanan, J. 1880: The Indigenous Grasses of New Zealand (with Addenda et Corrigenda). George Didsbury, Government Printer, Wellington.
Cheeseman, T.F. 1906: Manual of the New Zealand Flora. Government Printer, Wellington.
Cockayne, L. 1908: Report on a Botanical Survey of the Tongariro National Park. Government Printer, Wellington.
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. [as Deyeuxia avenoides (Hook.f.) Buchanan] [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. [as Deyeuxia avenoides (Hook.f.) Buchanan] [Not Threatened]
Edgar, E. 1995: New Zealand species of Deyeuxia P.Beauv. and Lachnagrostis Trin. (Graminieae: Aveneae)*. New Zealand Journal of Botany 33: 1–33. [as Agrostis avenoides Hook.f.; Calamagrostis avenoides (Hook.f.) cockayne; Deyeuxia avenoides (Hook.f.) Buchanan]
Hooker, J.D. 1864: Handbook of the New Zealand Flora: a systematic description of the native plants of New Zealand and the Chatham, Kermadec's, Lord Auckland's, Campbell's and Macquarie's Islands. Part I. Reeve, London.
Peterson, P.M.; Soreng, R.J.; Romaschenko, K.; Barberá, P.; Quintanar, A.; Aedo, C.; Saarela, J.M. 2022: Phylogeny and biogeography of Calamagrostis (Poaceae: Pooideae: Poeae: Agrostidinae), description of a new genus, Condilorachia (Calothecinae), and expansion of Greeneochloa and Pentapogon (Echinopogoninae). Journal of Systematics and Evolution 60(3): 570–590. (Published online: May 2022)