Stylidium ecorne (R.O.Erickson & J.H.Willis) Farrell & S.H.James

Foot Triggerplant

Austral. J. Bot. 27: 39 (1979) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Ephemeral, 50–180 mm high, simple or branched near base. Leaves few, rosetted, broadly ovate to almost orbicular, 2–7 mm long, 1–2 mm wide, sparsely glandular-pubescent, shortly petiolate. Flowers 1–4(–9) in a loose irregular corymb, rarely solitary. Calyx globose, 1–3 mm long, sparsely glandular-pubescent, lobes slightly longer than tube, one more deeply set than others; corolla 6–15 mm across, rose-pink, nectary spur very small or absent, lobes unequal, paired vertically, oblong-lanceolate, posterior pair smaller, 3-dentate, anterior pair curved and shallowly lobed at middle, labellum spathulate, acute, petal-like, throat appendages 2 or absent; column c. 1 mm long, downwards-projecting; stigma strap-like, fringed. Capsule globose, c. 3mm long; seeds globose, c. 0.2 mm long, yellowish-brown, finely ridged. Flowers Jul.–Jan.

CVU, DunT, Glep, Gold, GGr, HNF, HSF, LoM, NIS, VRiv, VVP, Wim. Scattered from south-western Victoria to Wangaratta area, usually in winter-wet, often sandy soils in Yellow Gum woodlands, Box-Ironbark forests, open heathy swamps etc.

Previously considered a variety of Stylidium calcaratum (now Stylidium androsaceum) and very similar. Despite sometimes occurring in sympatry, the two species remain distinct with the corolla of S. ecorne always lacking a nectar spur or having a reduced spur shorter than the calyx lobes (Farrell & James 1979). Stylidium ecorne also has a haploid chromosome number of 13 compared to 11 in S. androsaceum and crosses between the two species yield few seeds indicating a degree of reproductive isolation, providing further support for distinguishing the two taxa as separate species (Farrell & James 1979).

The absence of the nectar spur has often caused confusion with Stylidium perpusillum, a much smaller, more slender plant with white flowers only.   

Source: Raulings, E.J. (1999). Stylidiaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 4, Cornaceae to Asteraceae. Inkata Press, Melbourne (as Stylidium calcaratum var. ecorne F.Muell. ex R.Erickson & J.H.Willis).
Updated by: Daniel Ohlsen, 2016-03-02
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Distribution map

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Stylidium ecorne in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Stylidium ecorne in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Wimmera present native
Glenelg Plain present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
Dundas Tablelands present native
Northern Inland Slopes present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native

State distribution

Distribution map
State
Western Australia
South Australia
Queensland
Victoria