Olearia
Daisy-bush
Daisy-bush
Wikipedia links: Angiosperms > Eudicots > Asterids > Asterales > Asteraceae > Olearia
Other links:
Common name: Daisy-bush
Also, tree daisies in New Zealand
Conservation status: unknown
Etymology:
Is named after Johann Gottfried Olearius, a 17th-century German scholar and author of Specimen Florae Hallensis
Flowers:
All bear the familiar daisy-like composite flowerheads in white, pink, mauve or purple
With single-row ray florets enclosed by small overlapping bracts arranged in rows
The flower petals are more or less equal in length
The centre of the bi-sexual floret is disc shaped and may be white, yellowish or purplish, generally with 5 lobes
Flower heads may be single or clusters in leaf axils or at the apex of branchlets
From
In Olearia spp., the flowers are arranged in typical terminal capitula (or ‘heads’) with ray and disc florets
In this species, the heads are produced solitarily at the stem terminals or in small corymbs. Each head is about 3 cm across, with the ray florets blue to mauve and the disc florets yellow. The flowers are profuse, conspicuous and carried for most of the year.
Fruit:
The fruit are dry slightly compressed, one-seeded, narrow-elliptic or egg-shaped with longitudinal ridges and smooth or with sparse hairs
Leaves:
Leaves may be smooth, glandular or with a sticky secretion
The leaves may grow opposite, alternate, arranged sparsely or clustered
Leaf margins either entire or lobed, with or without a stalk
Stem & branches:
Roots:
Habit:
The genus includes herbaceous plants, shrubs and small trees
The latter are unusual among the Asteraceae
Habitat:
Distribution:
Olearia are found in Australia, New Guinea and New Zealand
There are approximately 180 species of Olearia, of which about 112 species are endemic to Australia
Olearia are found in all states of Australia
Species:
World: ~180 species
Australia: ~130 species (including 112 endemic species)
Additional notes:
Taxonomy
The genus Olearia was first described in 1802 by Conrad Moench in Supplementum ad Methodum Plantas
Originally a large genus, a molecular study has found it to be polyphyletic
Species
The following is a list of Olearia species accepted by the Australian Plant Census or the New Zealand Plant Conservation Network or listed in the Census of Vascular Plants of Papua New Guinea as at May 2021:
Olearia adenocarpa Molloy (N.Z.)
Olearia adenolasia (F.Muell.) F.Muell. ex Benth. – woolly-glandular daisy-bush (W.A.)
Olearia aglossa (Betche & Maiden) Lander (N.S.W., Vic.)
Olearia albida (Hook.f.) Hook.f. – tanguru (N.Z.)
Olearia algida N.A.Wakef. – alpine daisy-bush (N.S.W., A.C.T., Vic. Tas.)
Olearia allomii Kirk – Great Barrier tree daisy (N.Z.)
Olearia alpicola F.Muell. ex Benth. – alpine daisy-bush (N.S.W., Vic.)
Olearia angulata (Kirk) Allan (N.Z.)
Olearia angustifolia Hook.f. – teteaweka (N.Z.)
Olearia arborescens (G.Forst.) Cockayne & Laing – common tree daisy, glossy tree daisy (N.Z.)
Olearia archeri Lander (Tas.)
Olearia arckaringensis P.J.Lang – Arckaringensis daisy (S.A.)
Olearia argophylla (Labill.) F.Muell. ex Benth. – musk daisy-bush, native musk, silver shrub (N.S.W., Vic.)
Olearia arguta Benth. (W.A., N.T., Qld.)
Olearia arguta Benth. var. arguta (W.A., N.T.)
Olearia arguta var. lanata Benth. (W.A., N.T., Qld.)
Olearia arida E.Pritz. (W.A., S.A., N.T.)
Olearia asterotricha (F.Muell.) Benth. – rough daisy-bush (N.S.W., Vic.)
Olearia astroloba Lander & N.G.Walsh – marble daisy-bush (Vic.)
Olearia avicenniifolia (Raoul) Hook.f. – akeake (N.Z.)
Olearia axillaris (DC.) F.Muell. ex Benth. – coast daisy-bush (W.A., S.A., N.S.W., Vic., Tas.)
Olearia ballii (F.Muell.) Hemsl. – mountain daisy (Lord Howe Island)
Olearia brachyphylla (F.Muell. ex Sond.) N.A.Wakef. (W.A., S.A.)
Olearia brevipedunculata N.G.Walsh (N.S.W., Vic.)
Olearia bullata H.D.Wilson & Garn.-Jones (N.Z.)
Olearia burgessii Lander (N.S.W.)
Olearia calcarea F.Muell. ex Benth. – limestone daisy bush (W.A., S.A., Vic., N.S.W.)
Olearia canescens (Benth.) Hutch. (N.S.W., Qld.)
Olearia cassiniae (F.Muell.) F.Muell. ex Benth. (W.A.)
Olearia chathamica Kirk (N.Z.)
Olearia cheesmanii Cockayne & Allan – streamside tree daisy (N.Z.)
Olearia chrysophylla (DC.) Benth. (N.S.W., Qld.)
Olearia ciliata (Benth.) F.Muell. ex Benth. – fringed daisy-bush (W.A., S.A., Vic., Tas.)
Olearia colensoi Hook.f. – tupare, leatherwood (N.Z.)
Olearia cordata Lander (N.S.W.)
Olearia covenyi Lander (N.S.W.)
Olearia coriacea Kirk (N.Z.)
Olearia crebra E.K.Cameron & Heenan (N.Z.)
Olearia crosby-smithiana Petrie (N.Z.)
Olearia cuneifolia A.R.Bean & M.T.Mathieson (Qld.)
Olearia curticoma N.G.Walsh (Vic.)
Olearia cydoniifolia (DC.) Benth. (Qld., N.S.W.)
Olearia cymbifolia (Hook.f.) Cheeseman (N.Z.)
Olearia decurrens (DC.) Benth. – clammy daisy-bush (W.A., S.A., N.S.W., Vic.)
Olearia durifolia J.Kost. (P.N.G.)
Olearia elaeophila (A.Cunn. ex DC.) F.Muell. ex Benth. (W.A.)
Olearia elliptica DC. – sticky daisy-bush (Qld., N.S.W.)
Olearia eremaea Lander (W.A.)
Olearia ericoides (Steetz) N.A.Wakef. (Tas.)
Olearia erubescens (Sieber ex Spreng.) Dippel (S.A., N.S.W., A.C.T., Vic., Tas.) – pink-tip daisy-bush, moth daisy-bush
Olearia exiguifolia (F.Muell.) F.Muell. ex Benth. (W.A., S.A.)
Olearia ferresii (F.Muell.) Benth. (W.A., N.T., S.A., Qld.)
Olearia fimbriata Heads (N.Z.)
Olearia floccosa J.Kost. (P.N.G.)
Olearia flocktoniae Maiden & Betche – Dorrigo daisy-bush (N.S.W.)
Olearia floribunda (Hook.f.) Benth. – heath daisy-bush (N.S.W., Vic., S.A.)
Olearia fluvialis Lander (W.A.)
Olearia fragrantissima Petrie (N.Z.)
Olearia frostii (F.Muell.) J.H.Willis – Bogong daisy-bush (Vic.)
Olearia furfuracea (A.Rich.) Hook.f. – akepiro (N.Z.)
Olearia gardneri Heads (N.Z.)
Olearia glandulosa (Labill.) Benth. – swamp daisy-bush (S.A., Qld., N.S.W., A.C.T., Vic., Tas.)
Olearia glutinosa (Lindl.) Benth. – sticky daisy-bush (S.A., Vic. Tas.)
Olearia gordonii Lander (Qld.)
Olearia grandiflora Hook. – Mount Lofty daisy-bush (S.A.)
Olearia gravis (F.Muell.) Benth. (Qld., N.S.W.)
Olearia hectorii Hook.f. (N.Z.)
Olearia heterocarpa S.T.Blake – Nightcap daisy bush (Qld., N.S.W.)
Olearia heterolepis Mattf. (P.N.G.)
Olearia heterotricha Mattf. (P.N.G.)
Olearia homolepis (F.Muell.) Benth. (W.A.)
Olearia hooglandii J.Kost. (P.N.G.)
Olearia hookeri (Sond.) Benth. (Tas.)
Olearia humilis Lander (W.A.)
Olearia hygrophila (DC.) Benth. (Qld.)
Olearia ilicifolia Hook.f. – mountain holly (N.Z.)
Olearia imbricata (Turcz.) Benth. – imbricate daisy bush (W.A.)
Olearia incana (D.A.Cooke) Lander (W.A., S.A., Vic., N.S.W.)
Olearia incondita Lander (W.A.)
Olearia iodochroa (F.Muell.) Benth. – violet daisy-bush (N.S.W., Vic.)
Olearia kernotii F.Muell. (P.N.G.)
Olearia laciniifolia Lander (W.A.)
Olearia lacunosa Buchanan – lancewood tree daisy (N.Z.)
Olearia lanata J.Kost (P.N.G.)
Olearia lanuginosa (J.H.Willis) N.A.Wakef. – woolly daisy bush (W.A., S.A., Vic.)
Olearia lasiophylla Lander (N.S.W.)
Olearia laxiflora Kirk (N.Z.)
Olearia ledifolia (DC.) Benth. – rock daisy bush (Tas.)
Olearia lehmanniana (Steetz) Lander (W.A.)
Olearia lepidophylla (Pers.) Benth. – club-moss daisy-bush (W.A., S.A., N.S.W., Vic., Tas.)
Olearia lepidota Mattf. (P.N.G.)
Olearia leptocephala J.Kost (P.N.G.)
Olearia liniata (Kirk) Cockayne (N.Z.)
Olearia lirata (Sims) Hutch. – snowy daisy-bush (N.S.W., A.C.T., Vic., Tas.)
Olearia lyallii Hook.f. – subantarctic tree daisy (N.Z.)
Olearia macdonnellensis D.A.Cooke (N.T.)
Olearia magniflora (F.Muell.) Benth. – splendid daisy-bush (W.A.,, S.A., N.S.W., Vic.)
Olearia megalophylla (F.Muell.) F.Muell. ex Benth. – large-leaf daisy-bush (N.S.W., A.C.T., Vic.)
Olearia microdisca J.M.Black (S.A.)
Olearia microphylla (Vent.) Maiden & Betche – small-leaf daisy-bush (Qld., N.S.W., A.C.T.)
Olearia minor (Benth.) Lander (N.S.W., Vic., S.A., W.A.)
Olearia montana Lander (N.S.W.)
Olearia monticola F.M.Bailey (P.N.G.)
Olearia mooneyi (F.Muell.) Hemsl. (L.H.I)
Olearia moschata Hook.f. (N.Z.)
Olearia mucronata Lander (W.A.)
Olearia muelleri (Sond.) Benth. – Goldfields daisy, Mueller's daisy bush (W.A., S.A., Vic., N.S.W.)
Olearia muricata (Steetz) Benth. – rough-leaved daisy bush (W.A.)
Olearia myrsinoides (Labill.) F.Muell. ex Benth. – blush daisy-bush, silky daisy-bush (N.S.W., A.C.T., Vic., Tas.)
Olearia nernstii (F.Muell.) F.Muell. ex Benth. (Qld., N.S.W.)
Olearia newbeyi Lander (W.A.)
Olearia nummulariifolia (Hook.f.) Hook.f. (N.Z.)
Olearia obcordata (Hook.f.) Benth. (Tas.)
Olearia occidentissima Lander (W.A.)
Olearia odorata Petrie – scented tree daisy (N.Z.)
Olearia oliganthema F.Muell. ex Benth. (N.S.W.)
Olearia oporina (G.Forst.) Hook.f. (N.Z.)
Olearia oppositifolia (F.Muell.) Lander (Qld., N.S.W.)
Olearia orientalis A.R.Bean & Jobson (Qld.)
Olearia pachycephala J.Kost (P.N.G.)
Olearia pachyphylla Cheeseman (N.Z.)
Olearia pallida J.Kost (P.N.G.)
Olearia paniculata (J.R.Forst. & G.Forst.) Druce (N.Z.) – akiraho
Olearia pannosa Hook. – velvet daisy-bush (S.A., Vic.)
Olearia passerinoides (Turcz.) Benth. (W.A., S.A., N.S.W., Vic.)
Olearia paucidentata (Steetz.) F.Muell. ex Benth. (W.A.)
Olearia persoonioides (DC.) Benth. (Tas.)
Olearia phlogopappa (Labill.) DC. – dusty daisy-bush, alpine daisy-bush (N.S.W., A.C.T., Vic., Tas.)
Olearia picridifolia (F.Muell.) Benth. (W.A., S.A., Vic.)
Olearia pimeleoides (DC.) Benth. – pimelea daisy-bush (W.A., S.A., Qld., N.S.W., Vic.)
Olearia pinifolia (Hook.f.) Benth. (Tas.)
Olearia platyphylla Mattf. (P.N.G.)
Olearia plucheacea Lander (W.A.)
Olearia polita H.D.Wilson & Garn.-Jones (N.Z.)
Olearia quercifolia Sieber ex DC. – oak-leaved daisy-bush (N.S.W.)
Olearia quinquevulnera Heenan (N.Z.)
Olearia racemosa Domin (Qld.)
Olearia ramosissima (DC.) Benth. (W.A., Qld., N.S.W.)
Olearia ramulosa (Labill.) Benth. – twiggy daisy-bush (S.A., Qld., N.S.W., A.C.T., Vic., Tas.)
Olearia rani (A.Cunn.) Druce – heketara (N.Z.)
Olearia revoluta Benth. (W.A.)
Olearia rosmarinifolia (DC.) Benth. (Qld., N.S.W.)
Olearia rudis (Benth.) F.Muell. ex Benth. (S.A., N.S.W., Vic.)
Olearia rufa J.Kost (P.N.G.)
Olearia rugosa (F.Muell. ex W.Archer bis) Hutch. – wrinkled daisy-bush (N.S.W., Vic., Tas.)
Olearia solandri (Hook.f.) Hook.f. – coastal tree daisy (N.Z.)
Olearia speciosa Hutch. (Vic.)
Olearia spectabilis J.Kost (P.N.G.)
Olearia stellulata (Labill.) DC. (Vic., Tas.)
Olearia stenophylla N.G.Walsh (N.S.W.)
Olearia stilwelliae Blakely (N.S.W.)
Olearia strigosa (Steetz) Benth. – bristly daisy bush (W.A.)
Olearia stuartii (F.Muell.) Benth. (W.A., N.T., S.A., Qld.)
Olearia subspicata (Hook.) Benth. (W.A., N.T., S.A., Qld., N.S.W., Vic.)
Olearia suffruticosa D.A.Cooke – clustered daisy-bush (S.A., N.S.W., Vic.)
Olearia tasmanica W.M.Curtis (Tas.)
Olearia telmatica Heenan & de Lange – shell akeake, swamp akeake (N.Z.)
Olearia tenuifolia (DC.) Benth. – thin-leaf daisy-bush (N.S.W., A.C.T., Vic.)
Olearia teretifolia (Sond.) Benth. – cypress daisy-bush (S.A., Vic.)
Olearia tomentosa (J.C.Wendl.) Benth. – toothed daisy-bush (N.S.W., Vic.)
Olearia towsonii Cheeseman – Coromandel tree daisy (N.Z.)
Olearia traversiorum (F.Muell.) Hook.f. – hakapiri, Chatham Island akeake (N.Z.)
Olearia trifurcata Lander (W.A.)
Olearia tubuliflora (Sond. & F.Muell. ex Sond.) Benth. (S.A., Vic.)
Olearia velutina J.Kost (P.N.G.)
Olearia vernonioides C.T.White & Francis (P.N.G.)
Olearia virgata (Hook.f.) Hook.f. (N.Z.)
Olearia viscidula (F.Muell.) Benth. – viscid daisy-bush (N.S.W.)
Olearia viscosa (Labill.) Benth. – sticky daisy-bush (Vic., Tas.)
Olearia xerophila (F.Muell.) Benth. (W.A., Qld.)
Use in horticulture
Several species are cultivated as ornamental garden plants, and there are hybrids of uncertain or mixed parentage. Among these, the following have been given the Royal Horticultural Society’s Award of Garden Merit:
Olearia macrodonta, New Zealand holly
Olearia × mollis ‘Zennorensis’, daisy bush ‘Zennorensis’
Olearia × scilloniensis
Olearia × scilloniensis ‘Master Michael’
They are generally hardy down to −10 °C, but require a sheltered spot in full sun
Sources of information: