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Service Notice

The Western Australian Herbarium’s collections management system, WAHerb, and DBCA’s taxonomic names application, WACensus, have been set to read-only mode since 1 October 2025. Recent taxonomic changes are not reflected in Florabase, herbarium collections, or in the census. We are hoping to be able to reinstate services around December 15; we will provide an update at that time.

The notice period started at 9:00 am on Wednesday, 1 October 2025 +08:00 and will end at 12:00 pm on Monday, 15 December 2025 +08:00.

Isopogon trilobus R.Br.
Barrel Coneflower

Reference
Trans.Linn.Soc.London 10:72 (1810)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Upright, non-lignotuberous shrub, 0.3-2 m high. Fl. yellow/cream-yellow, Sep to Dec or Jan. White, grey or brown sand, sand & laterite. Sandplains, sand dunes, coastal rocky areas.

Grazyna Paczkowska, Descriptive Catalogue, 22 August 1995
Image

Scientific Description

Shrubs, 1-2.5 m high, with straight hairs. Leaves alternate, 40-70 mm long, glabrous; lamina flat, once divided or twice or more divided, pinnately divided, tripartitely divided or divided only at the apex, shallowly divided or deeply divided, with 3-5 points or lobes; distance from base of leaf to lowest lobe 20-30 mm. Inflorescences not viscid, cream or yellow. Perianth 10-12 mm long, hairy, the limb apex hairy all over; pistil 10-13 mm long; pollen presenter fusiform, hairy, 3-5 mm long. Cone with deciduous scales, 26-28 mm long. Flowers in January, September, October, November or December. Occurs in the Eremaean (ER) or South-west (SW) Botanical Province(s), in the Coolgardie (COO), Avon Wheatbelt (AW), Jarrah Forest (JF), Mallee (MAL) or Esperance Plains (ESP) IBRA subregion(s).

C. Hollister and K.R. Thiele, 19 January 2024

Distribution

IBRA Regions
Avon Wheatbelt, Coolgardie, Esperance Plains, Jarrah Forest, Mallee.
IBRA Subregions
Eastern Mallee, Fitzgerald, Katanning, Mardabilla, Recherche, Southern Jarrah Forest, Western Mallee.
Local Government Areas (LGAs)
Albany, Broomehill-Tambellup, Cranbrook, Dundas, Esperance, Gnowangerup, Jerramungup, Kent, Plantagenet, Ravensthorpe.