Class
Order
Family
Genus
Classification
Nomenclature
Scientific Name:
Trisetum serpentinum Edgar & A.P.Druce, New Zealand J. Bot. 36: 554 (1998)
Description
Rather open tufts to 50 cm, with dull green, narrow, inrolled leaves overtopped by narrow to ± lax, usually purplish panicles; branching extravaginal. Leaf-sheath 1–3 cm, densely softly pubescent, with longer scattered hairs on sheaths of culm-leaves, and sometimes on margins. Ligule 0.4–0.8 mm, erose, minutely ciliate. Leaf-blade 2–16 cm, usually inrolled and < 1 mm diam., rarely flat and up to 2 mm wide, sometimes with scattered long hairs, abaxially smooth or with very minute prickle-teeth, adaxially shallowly ribbed with scattered very fine prickle-teeth on ribs; margins minutely prickle-toothed, sometimes with scattered long hairs. Culm 8–34–(40) cm, slender, internodes with long fine hairs above nodes and a small band of shorter hairs below nodes, uppermost internode glabrous. Panicle 2–10 × 0.5–2 cm, narrow-lanceolate to somewhat open, with visible rachis and short, ascending to spreading branches bearing clustered spikelets; rachis and branches with moderately dense, fine prickle-teeth and often a few longer hairs at lower nodes of rachis and at base of panicle. Spikelets 4–6.5 mm, often purplish. Glumes unequal, with sparse short prickle-teeth on keel; lower ⅔-¾ length of upper, oblong-lanceolate, upper < to ≈ spikelet, elliptic-lanceolate; margins with very few minute prickle-teeth near acute to acuminate tip. Lemma 3–4.5 mm, bicuspid, minutely papillose; awn 3–4 mm, ± recurved, insertion in upper ¼ of lemma. Palea minutely prickle-toothed on keels and margins. Callus hairs c. 0.2 mm. Rachilla hairs to 0.8 mm. Lodicules to 1 mm, glabrous. Anthers to 1.5 mm. Gynoecium: ovary to 0.8 mm; stigma-styles to 1 mm. Caryopsis not seen.
[From: Edgar and Connor (2000) Flora of New Zealand. Volume 5 (second printing).]
Biostatus
Indigenous (Endemic)
Bibliography
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. 1998: Trisetum Pers. (Gramineae: Aveneae) in New Zealand. New Zealand Journal of Botany 36: 539–564.
