Olearia ramulosa (Labill.) Benth.

Twiggy Daisy-bush

Fl. Austral. 3: 476 (1867) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Very variable shrub, 0.3–2 m high; branchlets white-cottony, setose (with setae to 1.5 mm long), or glandular, or with combinations of any or all of these conditions. Leaves alternate, subsessile, narrow-elliptic, narrow-obovate or linear (often toothed to deeply lobed on young plants), 3–15 mm long, 0.8–2.5 mm wide, green, glabrous, slightly cottony, scabrous or setose above; white- or grey-tomentose, sometimes glandular beneath, or the lower surface obscured by the revolute margins. Capitula c. 10–25 mm diam., subsessile or on slender, naked or leafy peduncles to c. 18 mm long, mostly axillary; involucre conical, 3–6 mm long; bracts 2–3-seriate, graduating, variably pubescent, glandular, or glabrous, acute or obtuse. Ray florets 2–10, white, mauve or blue, ligules 3–6 mm long; disc florets 3–13, yellow or mauve. Cypsela c. cylindric, c. 2 mm long, 6–8-ribbed, moderately to densely sericeous, sometimes glandular; pappus pale, c. 4 mm long.

Brid, CVU, DunT, EGL, EGU, GipP, Glep, Gold, GGr, HNF, HSF, LoM, MuF, MuM, OtP, OtR, Strz, VAlp, VRiv, VVP, WaP, WPro, Wim.

A complex, of which 6 varieties have been described for Victoria (Willis 1956, 1973). Since the publication of those varieties, numerous additional collections of O. ramulosa s. lat. have been made, blurring the boundaries between the published names. However, this additional collection effort has identified a distinct form from montane regions in Victoria (previously treated in VicFlora as Olearia aff. ramulosa (Omeo), see O. stricta). It is beyond the scope of this treatment to present a complete resolution to the remainder of this complex. Such a task requires examination of material from across the extensive range of the species (from South Australia to Queensland). In Victoria, with the exception of a few intermediate specimens, two broad morphological and ecological groups have be recognized: var. ramulosa from coastal areas and var. stricta from inland sites (see O. stricta subsp. stricta for note on the application of the epithet stricta). However, these two broad entities appear to break-down when specimens outside of Victoria are examined, and are now treated together in O. ramulosa var. ramulosa.

Currently, O. ramulosa var. tomentosa, a morphologically distinct form with a relatively narrow distribution is the only other variety recognised within this species.

A distinctly bristly form from the Grampians with long setose hairs on stems, leaves and bracts, and that lacks sessile or glandular hairs appears to conform to O. ramulosa var. longisetosa J.H.Willis. These long haired plants often have relatively sparse leaves that are narrowly elliptic rather than ± linear. However, the status of this taxon remains uncertain as there is a clear continuum from long to short haired plants throughout this area, and plants with long setae are often glandular.

Source: Walsh, N.G.; Lander, N.S. (1999). Olearia. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 4, Cornaceae to Asteraceae. Inkata Press, Melbourne.
Updated by: Andre Messina, 2019-05-15
 
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Asteranae
order Asterales
family Asteraceae
genus Olearia
Higher taxa
Subordinate taxa

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Olearia ramulosa in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Olearia ramulosa in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Wimmera present native
Glenelg Plain present native
Bridgewater present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Murray Fans present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
Dundas Tablelands 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
Strzelecki Ranges present native
Victorian Alps present native

State distribution

Distribution map
State
South Australia
Queensland
New South Wales
Australian Capital Territory
Victoria
Tasmania