Olearia pannosa
{{short description|Species of plant}}
{{Speciesbox
|image = Olearia pannosa flowers.jpg
|image_caption = Subspecies pannosa in the Australian National Botanic Gardens
|status =
|status_system =
|genus = Olearia
|species = pannosa
|authority = Hook.{{cite web |title=Olearia pannosa |url=https://biodiversity.org.au/nsl/services/apc-format/display/105925 |website=Australian Plant Census |access-date=22 June 2022}}
|synonyms =
- Aster pannosus (Hook.) F.Muell.
- Eurybia pannosa (Hook.) F.Muell. nom. inval.
- Olearia lanceolata Sond. nom. inval., pro syn.
- Steetzia pannosa (Hook.) Sond.
}}
File:Olearia pannosa cardiophylla.jpg]]
Olearia pannosa, commonly known as silver-leaved daisy or velvet daisy-bush,{{cite web |title=Olearia pannosa |url=http://www.flora.sa.gov.au/cgi-bin/speciesfacts_display.cgi?form=speciesfacts&name=Olearia_pannosa |publisher=State Herbarium of South Australia |access-date=22 June 2022}} is a species of flowering plant in the family Asteraceae and is endemic to south-eastern continental Australia. It is a spreading undershrub or shrub with egg-shaped or heart-shaped leaves, and white and yellow daisy flowers.
Description
Olearia pannosa is a spreading undershrub or shrub that typically grows to a height of up to {{cvt|1|m}} and forms a root suckers. The branchlets are covered with woolly, Y-shaped hairs. The leaves are arranged alternately, egg-shaped or heart-shaped, {{cvt|30–120|mm}} long and {{cvt|18–65|mm}} wide on a petiole up to {{cvt|22|mm}} long, the upper surface becoming glabrous and the lower surface covered with hairs similar to those on the branchlets. The heads or daisy-like "flowers" are arranged singly on the ends of branches and are {{cvt|35–75|mm}} wide on a peduncle {{cvt|5–25|mm}} long, the involucre hemispherical and woolly-hairy. Each flower has 8 to 24 white ray florets and 18 to 50 yellow disc florets. Flowering occurs from September to November and the achenes are {{cvt|5–8|mm}} long, the pappus {{cvt|8–10|mm}} long.{{cite web |last1=Walsh |first1=Neville G. |last2=Lander |first2=Nicholas S. |title=Olearia pannosa subsp. cardiophylla |url=https://vicflora.rbg.vic.gov.au/flora/taxon/95c7be76-c6db-4373-aa1c-e37824ff43f2 |publisher=Royal Botanic Gardens Victoria |access-date=22 June 2022}}
Taxonomy
Olearia pannosa was first formally described in 1852 by William Jackson Hooker in his Icones Plantarum from specimens collected near the Murray River in South Australia.{{cite web|title=Olearia pannosa|url= https://id.biodiversity.org.au/instance/apni/534753|publisher=APNI|access-date=22 June 2022}}{{cite book |last1=Hooker |first1=William Jackson |title=Icones Plantarum |volume=9 |date=1852 |publisher=Lovell Reeve & Co. |location=London |page=862 |url=https://www.biodiversitylibrary.org/item/54430#page/128/mode/1up |access-date=22 June 2022}}
In 1853, Ferdinand von Mueller described Eurybia cardiophylla in the journal Linnaea from specimens collected on Mount Remarkable in South Australia,{{cite web|title=Eurybia cardiophylla|url= https://id.biodiversity.org.au/instance/apni/503758|publisher=APNI|access-date=22 June 2022}}{{cite journal |last1=von Mueller |first1=Ferdinand |title=Diagnoses et descriptiones plantarum novarum, quas in Nova Hollandia. |journal=Linnaea: ein Journal für die Botanik in ihrem ganzen Umfange, oder Beiträge zur Pflanzenkunde |date=1853 |volume=25 |page=398 |url=https://www.biodiversitylibrary.org/item/109556#page/404/mode/1up |access-date=22 June 2022}} but in 1986, David Cooke reduced this species to Olearia pannosa subsp. cardiophylla (F.Muell.) D.A.Cooke. That name, and that of the autonym (Olearia pannosa Hook. subsp. pannosa (F.Muell.) D.A.Cooke) are accepted by the Australian Plant Census.{{cite web |title=Olearia pannosa subsp. cardiophylla |url=https://biodiversity.org.au/nsl/services/apc-format/display/105302 |website=Australian Plant Census |access-date=22 June 2022}}{{cite web |title=Olearia pannosa subsp. pannosa |url=https://biodiversity.org.au/nsl/services/apc-format/display/105308 |website=Australian Plant Census |access-date=22 June 2022}}
Distribution and habitat
Conservation status
Olearia pannosa subsp. pannosa is listed as "vulnerable" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 and the South Australian Government National Parks and Wildlife Act 1972. Threats to this subspecies include habitat loss, weed invasion and inappropriate fire regimes.{{cite web |title=Approved Conservation Advice for Olearia pannosa subsp. pannosa (silver daisy-bush) |url=http://www.environment.gov.au/biodiversity/threatened/species/pubs/12348-conservation-advice.pdf |publisher=Australian Government Department of Agriculture, Water and the Environment |access-date=22 June 2022}} Subspecies cardiophylla is listed as "vulnerable" in Victoria, under the Flora and Fauna Guarantee Act 1988.
References
{{Reflist}}
{{Taxonbar|from=Q15588919}}
Category:Flora of South Australia
Category:Flora of Victoria (state)