| Olearia hectorii | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Olearia |
| Species: | O. hectorii |
| Binomial name | |
| Olearia hectorii | |
Olearia hectorii is a species of flowering plant in the daisy family Asteraceae. [3] Its common names include deciduous tree daisy and Hector's tree daisy. [1] It is endemic to New Zealand, where it is nationally endangered. [1]
Members of the genus Olearia , commonly known as daisy-bushes or tree daisies, are found in New Zealand, Australia, and New Guinea. Although originally published under the name Olearia hectori, hectorii is the correct epithet under the ICBN (ST Louis) Art. 60.11. [3]
O. hectorii is a deciduous shrub or small tree, up to 10 m tall, with reddish stems, furrowed bark, and oppositely-arranged clusters of 2–4 gray-green leaves, 20–50 mm long by 5–20 mm wide. The undersides of the leaves are covered in a silvery indumentum. As with most other Asteraceae, the tiny flowers are borne in dense clusters known as pseudanthia, which are produced on short, hairy stems from near the leaf axils. The florets are pale yellow, and enclosed by pale green, densely hairy phyllaries. The seeds are cypselae, similar in structure to those of dandelions, consisting of a 1–2 mm achene attached to a 3–5 mm feathery pappus. [4]
This species is threatened by habitat degradation. [5] It requires open habitat for germination, but this kind of habitat is threatened by introduced flora and grazing animals. [4]
Olearia hectorii is a host of numerous endemic moth species and is known to support at least 23 species, with at least 12 of those species exclusively hosted by this plant. [6] These moths are likely to play an important role in the pollination of the O. hectorii. [6] Species dependent on this plant include the nationally critically endangered Stathmopoda campylocha and the nationally endangered S. albimaculata. [6]
This plant is now classified under the New Zealand Threat Classification System as being Nationally Endangered. [2]
Olearia, most commonly known as daisy-bush, is a genus of flowering plants belonging to the family Asteraceae, the largest of the flowering plant families in the world. Olearia are found in Australia, New Guinea and New Zealand. The genus includes herbaceous plants, shrubs and small trees. The latter are unusual among the Asteraceae and are called tree daisies in New Zealand. All bear the familiar daisy-like composite flowerheads in white, pink, mauve or purple.
Muehlenbeckia astonii or shrubby tororaro is an endemic New Zealand shrub in the family Polygonaceae. It has distinctive small heart-shaped deciduous leaves amidst a tangle of wiry interlocking branches. Although common in cultivation around the world, it is extremely rare and threatened in the wild.
Olearia traversiorum, the Chatham Island akeake, or Chatham Island tree daisy, is a species of flowering plant in the family Asteraceae. It is endemic to the Chatham Islands of New Zealand. It is also known by the synonym O. traversii.
Olearia pimeleoides, commonly known as pimelea daisy-bush, is a species of flowering plant in the family Asteraceae and is endemic to southern continental Australia. It is an erect shrub with elliptic, linear or lance-shaped leaves, and white and pale yellow, daisy-like inflorescences.
Olearia paniculata, commonly called akiraho, is a species of shrub or tree in the family Asteraceae, found only in New Zealand. The tree can grow to 6 metres high, and has yellow-green, oval-shaped leaves, with white undersides and wavy margins.
Olearia odorata, the scented tree daisy, is a small divaricating shrub endemic to New Zealand, from the plant family Asteraceae. It has small light green leaves with a large amount of interlacing twigs and grows to around 2–4m in height. In spring O. odorata produces many small white flowers.
Olearia mooneyi, commonly known as pumpkin bush, is a species of flowering plant in the family Asteraceae and is endemic to Lord Howe Island. It is a shrub or small tree with hairy, elliptic to egg-shaped leaves with the narrower end towards the base, and white and pale yellow, daisy-like inflorescences.
Olearia adenocarpa or small-leaved tree daisy is a small divaricating shrub endemic to New Zealand, from the plant family Asteraceae. The bush grows up to 1.5 metres in height and 1.2 m wide. It has a smaller and open growth habit in comparison to Olearia odorata. It is trailing deciduous to semi-deciduous.
Olearia avicenniifolia, known commonly as mountain akeake, is a flowering plant in the family Asteraceae. It is endemic to New Zealand where it is found on the southern coastlines of the South Island and on Stewart Island. It is classified as Not Threatened.
Olearia flocktoniae, commonly known as Dorrigo daisy bush, is a species of flowering plant in the family Asteraceae and is endemic to a restricted area of New South Wales. It is a shrub with crowded, linear leaves, and white and yellow, daisy-like inflorescences.
Olearia arckaringensis, commonly known as Arckaringensis daisy, is a species of flowering plant in the family Asteraceae and is endemic to a restricted area of northern South Australia. It is a small, compact, rounded shrub with woolly-hairy foliage, coarsely-toothed, elliptic leaves and lavender or white and yellow, daisy-like inflorescences.
Olearia eremaea is a species of flowering plant in the family Asteraceae and is endemic to inland areas of Western Australia. It is a shrub with scattered, more or less elliptic leaves, and white and yellow, daisy-like inflorescences.
Olearia fluvialis is a species of flowering plant in the family Asteraceae and is endemic to inland areas of northern Western Australia. It is a shrub with scattered, narrowly egg-shaped leaves, and white or mauve and yellow, daisy-like inflorescences.
Olearia incana is a species of flowering plant in the family Asteraceae and is endemic to southern Australia. It is a shrub with narrowly elliptic or wedge-shaped leaves and white and pale yellow, daisy-like inflorescences.
Olearia lehmanniana is a species of flowering plant in the family Asteraceae and is endemic to inland areas of the south-west of Western Australia. It is a shrub with scattered elliptic or linear leaves that are densely hairy on the lower surface, and pale mauve, daisy-like inflorescences.
Olearia macdonnellensis is a species of flowering plant in the family Asteraceae and is endemic to a restricted part of the Northern Territory of Australia. It is an erect, bushy shrub shrub with broadly elliptic to broadly egg-shaped leaves and yellow, or white and yellow, daisy-like inflorescences.
Olearia microdisca, commonly known as small-flowered daisy-bush, is a species of flowering plant in the family Asteraceae and is endemic to Kangaroo Island, South Australia. It is a compact shrub with small, crowded, oblong leaves and white and yellow, daisy-like inflorescences.
Olearia muricata, commonly known as rough-leaved daisy bush, is a species of flowering plant in the family Asteraceae and is endemic to the south-west of Western Australia. It is an erect shrub with flat, linear to triangular leaves, and white or pale mauve and yellow, daisy-like inflorescences.
Olearia plucheacea is a species of flowering plant in the family Asteraceae and is endemic to inland Western Australia. It is an erect, open shrub with scattered hairy, thread-like to linear leaves, and white and yellow daisy-like inflorescences.
Olearia trifurcata is a species of flowering plant in the family Asteraceae and is endemic to the south of Western Australia. It is a dense, upright, tussock-like subshrub with narrowly triangular, grass-like leaves, and white and pale yellow, daisy-like inflorescences.
