Cassinia scabrida Orchard

Rough Cassinia

Australian Systematic Botany 17: 454 (2004) APNI

Taxonomic status:Accepted

Occurrence status:Endemic

Establishment means:Native

Threat status:Victoria: rare (r)

Erect shrub to 2 m high; branchlets with dense gland-tipped acicular hairs, occasionally also with cottony hairs on youngest parts. Leaves suberect or spreading, sessile, slightly auriculate and stem clasping at the base, linear, (30–)55–65(–85) mm long, (1–)4–5(–10) mm wide, upper and lower surfaces green with dense short gland-tipped acicular hairs, apex acute with a reflexed mucro, margin revolute when dehydrated. Inflorescences corymbose, 9.5–11.5 cm diam. Capitula hundreds to thousands, pale greenish white and shiny, cylindric, (3.5–)4.2–4.5(–5.0) mm long, c. 1–2 mm wide; involucral bracts 10–15, innermost lanceolate with lamina narrow-triangular, c. 1.5–2 mm long, erect, flat, hyaline, margin entire to erose; receptacle bracts 1–3; florets 4–5. Cypsela cylindric, (0.9–) 1.0–1.2 mm long, glabrous. Pappus usually absent or rarely 1–4 bristles, c. 1.5 mm long. Flowers Nov.–Feb.   

CVU, HNF, NIS. Endemic to north-east Victoria where known from the Warby Range, Mount Granya, Mount Lawson and Pine Mountain. Locally common understorey shrub in tall and dry Eucalyptus forest of flat areas on granitic inselbergs with sandy or clay soils. Occurs from 180–900 m altitude.

Cassinia scabrida and another similar Victorian species, C. venusta, were once included within a broader C. ozothamnoides (see note under C. ozothamnoides).

Low altitude populations from the Warby Range can exhibit aberrant features for this species, including flowers with 1–4 pappus bristles, rather blunt phyllaries, very short peduncles on lateral capitula in inflorescences and young stems and leaves with some cottony hairs. These features are more typical of C. ozothamnoides, a species that principally occurs on the plains c. 200 m of altitude. It is possible that this area represents an overlap in the altitudinal ranges of the two species which has allowed hybridisation to occur (Orchard 2004a).

Cassinia scabrida and C. venusta co-occur near the summit of Pine Mountain (see note under C. venusta).

Created by: Daniel Ohlsen, 2015-10-09
Updated by: Val Stajsic, 2018-03-16
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Asteranae
order Asterales
family Asteraceae
genus Cassinia
Higher taxa

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Cassinia scabrida in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Cassinia scabrida in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Central Victorian Uplands present native
Northern Inland Slopes present native
Highlands-Northern Fall present native

State distribution

Distribution map
State
New South Wales
Australian Capital Territory
Victoria