Hypsela tridens E.Wimm.

Hypsela

Pflanzenr. IV, 276b (Heft 106): 121, fig. 31c (1943) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Mat-forming, glabrous or minutely pubescent perennial; stems often reddish, rooting at nodes. Leaves oblong-elliptic, 1.3–8 mm long, 0.5–3 mm wide, margins toothed (rarely c. entire), distal pair of teeth prominent, petiole 0–0.6 mm long. Pedicels 0.3–20 mm long, usually minutely pubescent. Hypanthium densely minutely pubescent; calyx-lobes 0.5–1.5 mm long; corolla 4–9.5 mm long, white or tinged very pale mauve, glabrous to sparsely and minutely pubescent externally, upper 2 lobes subequal to or slightly narrower than lower 3, c. elliptic, 2–5.5 mm long, 0.5–1.4 wide, tube 2–5 mm long, shortly split; filaments 2.8–5.3 mm long, anther tube 1–1.3 mm long, apical seta of 2 lower anthers c. 0.1–0.2 mm long. Fruit ellipsoid to globose, 1.5–3 mm long; seeds broadly ellipsoid, slightly compressed and angular, 0.3–0.4 mm long, light to dark brown, alveoles c. isodiametric. Flowers mostly Nov.–May; fruits Jan.–Jun.

CVU, EGL, GipP, HNF, HSF, MuF, NIS, VRiv, VVP, WaP. Occurs on lake and reservoir margins, and on the fringes of billabongs and creeks where the silty substrate bakes hard in summer. Possibly overlooked due to its diminutive stature and perhaps more widely distributed than records indicate.

Plants apparently wither in fruit and remain dormant over winter (when plants are usually submerged) shooting again in warmer, drier conditions.

Although included by Lammers (1999) in Isotoma, it is retained here in Hypsela until generic limits of the lobelioid Campanulaceae are clarified,

Source: Albrecht, D.E.; Walsh, N.G. (1999). Campanulaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 4, Cornaceae to Asteraceae. Inkata Press, Melbourne.
Updated by: Neville Walsh, 2018-01-11
 
References

Lammers, T.G. (1999). Nomenclatural consequences of the synonymization of Hypsela reniformis (Campanulaceae: Lobelioideae)., Novon 9: 75.

Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Asteranae
order Asterales
family Campanulaceae
genus Hypsela
Higher taxa

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Hypsela tridens in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Hypsela tridens in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Victorian Volcanic Plain present native
Victorian Riverina present native
Murray Fans present native
Gippsland Plain present native
Warrnambool Plain present native
Central Victorian Uplands present native
Northern Inland Slopes present native
East Gippsland Lowlands present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native