Caladenia dilatata R.Br.

Prodr. 325 (1810) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: data deficient (k)

Flowering plant 20–35 cm tall. Leaf 6–13 cm long, 6–8 mm wide, often spotted red at base, sometimes senescent at flowering time. Flower solitary; perianth segments 4–6 cm long, green with red central stripe, bearing thickened yellow apical osmophores 5–15 mm long; dorsal sepal erect, 2–2.5 mm wide, tip drooping; lateral sepals projected forwards stiffly, parallel or crossed, asymmetric, dilated at base, 3–3.5 mm wide, tapered to a filiform tail; petals deflexed, 1.5–2 mm wide. Labellum loosely hinged, curved forward with lateral lobes erect and tip of mid-lobe curved under, prominently 3-lobed, 14–17 mm long and 13–17 mm wide (when flattened), green at base, grading to white then with a dark purple mid-lobe; larger comb-teeth on lateral lobes 4–5 mm long, rising nearly to anther tip, mid-lobe irregularly and broadly toothed or scalloped; lamina calli in 4 densely crowded rows extending onto base of mid-lobe, linear to narrowly club-shaped, to 1.5 mm long at base of labellum, shorter and with broader heads towards apex. Flowers Nov.–Jan.

CVU, DunT, EGL, EGU, GipP, Glep, Gold, GGr, HNF, HSF, LoM, MuM, NIS, OtP, OtR, SnM, VRiv, VVP, WPro, Wim. Grows mostly in coastal or near-coastal heathland and open-forest across the State.

Caladenia dilatata is distinguished by its late flowering period, prominent thickened clubs on the sepals and petals (usually) and preference for near-coastal habitats.

Caladenia necrophylla from south-eastern South Australia, differs from C. dilatata in the leaf being quite dried and brown at flowering time (often even before the flowering stem emerges), having pale brownish osmophores on the sepals and petals and a narrower, less incurved column. Specimens from the south-west of Victoria often have senescent leaves at flowering time, but are otherwise typical of C. dilatata.

Source: Entwisle, T.J. (1994). Orchidaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons. Inkata Press, Melbourne.
Updated by: Jeff Jeanes, 2015-04-28
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Asparagales
family Orchidaceae
genus Caladenia
Higher taxa

Victoria

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

State distribution

Distribution map
State
Victoria