Isotoma axillaris Lindl.

Showy Isotome

Edwards’s Bot. Reg. 12, t. 964 (1826) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Minutely pubescent to glabrescent, decumbent to erect perennial, to c. 50 cm high; stems often maroon-tinged. Leaves ovate or obovate in outline, 1.5–12 cm long, to c. 6 cm wide, pinnatisect, lobes linear to linear-lanceolate, simple or toothed. Flowers solitary in upper axils; pedicels 3–17 cm long, minutely pubescent. Calyx-lobes 4.5–11 mm long; corolla 25–45 mm long; lobes subequal or upper 2 slightly narrower, bright blue-mauve (rarely white or pinkish), oblanceolate to lanceolate, 9–18 mm long, 2.2–6.5 mm wide, tube c. 17–24 mm long, very shortly slit; filaments 18–24 mm long, anther tube 4–6 mm long, seta of lower anthers c. 1.7–2.3 mm long. Capsule obconical, slightly compressed, 8–18 mm long; seeds c. cylindrical, 0.7–1 mm long, brown, alveoles c. isodiametric. Flowers and fruits most of year.

CVU, EGL, EGU, GipP, Gold, HNF, HSF, MonT, MuF, NIS, SnM, VAlp, VRiv, Wim. Also Qld, NSW. A herb of dry open rocky areas, often associated with granite outcrops.

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


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Isotoma axillaris in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Isotoma axillaris in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present native
Victorian Riverina present native
Murray Fans present native
Gippsland Plain present native
Goldfields present native
Central Victorian Uplands present native
Northern Inland Slopes present native
East Gippsland Lowlands present native
East Gippsland Uplands present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Monaro Tablelands present native
Victorian Alps present native
Snowy Mountains present native

State distribution

Distribution map
Western Australia
New South Wales
Australian Capital Territory