Class
Order
Family
Genus
Classification
Nomenclature
Scientific Name:
Utricularia australis R.Br., Prodr. Fl. Nov. Holland. 430 (1810)
Synonymy:
- = Utricularia protrusa Hook.f., Bot. Antarct. Voy. II (Fl. Nov.-Zel.) Part II, 206 (1854)
- = Utricularia mairii Cheeseman, Man. New Zealand Fl. 560 (1906)
Vernacular Name(s):
Bladderwort; yellow bladderwort
Description
Glabrous aquatic; stems floating, up to 40 cm or more long, filiform, sparingly branched. Lvs numerous, submerged, multifid, 3–(4) cm long; segments capillary, to ± 1 cm long. Bladders numerous, (1)–2–3–(4) mm long, obliquely ovoid, attached by short stalk to near base of lf segments; mouth usually with 2 long setae. Scape rather stout, to c. 17 cm long, erect, 2–4–(5)-flowered; bracts c. 3 mm long, broad; pedicels to 17 mm long, slender. Calyx lobes oblong to elliptic. Corolla yellow; upper lip 3-lobed; lower entire, 7–9 mm wide, broad; palate protruded; spur short, obtuse. Capsule c. 1.5–2 mm diam., globose.
[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]
Biostatus
Indigenous (Non-endemic)
Phenology
Flowering: Jan.–Mar.
Bibliography
Brown, R. 1810: Prodromus Florae Novae Hollandiae et Insulae Van-Diemen. Johnson, London.
Cheeseman, T.F. 1906: Manual of the New Zealand Flora. Government Printer, Wellington.
de Lange, P.J.; Gosden, J.; Courtney, S.P.; Fergus, A.J.; Barkla, J.W.; Beadel, S.M.; Champion, P.D., Hindmarsh-Walls, R.; Makan, T.; Michel, P. 2024: Conservation status of vascular plants in Aotearoa New Zealand, 2023. New Zealand Threat Classification Series. No. 43. [Nationally Critical]
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. [Nationally Endangered]
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. [Nationally Critical]
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. [Nationally Critical]
Heenan, P.B.; de Lange, P.J.; Knightbridge, P.I. 2004: Utricularia geminiscapa (Lentibulariaceae), a naturalised bladderwort in the South Island, New Zealand. New Zealand Journal of Botany 42: 247–251.
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.
