Rock isotome | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Asterales |
Family: | Campanulaceae |
Genus: | Isotoma |
Species: | I. petraea |
Binomial name | |
Isotoma petraea | |
Isotoma petraea, commonly known as rock isotome, [2] is a small[ citation needed ], herbaceous plant in the family Campanulaceae occurring in arid regions of Australia. It has single, purplish-blue flowers on smooth, slender branches from February to November.
Isotoma petraea is an erect, spreading, perennial or annual herbaceous plant with smooth branches that typically grows to a height of 0.2 to 0.6 metres (0.7 to 2.0 ft). The smooth leaves are narrowly egg-shaped to elliptic, 3–7.5 cm (1.2–3.0 in) long, 1–3.5 cm (0.39–1.38 in) wide, petiolate on lower sections sessile toward the branch apex, sharply lobed, unevenly spaced teeth and ending in a point. The blue-purplish flowers are borne singly on a wiry peduncle 8–25 cm (3.1–9.8 in) long. The calyces are narrow-triangular, pointed, 5–12 mm (0.20–0.47 in) long, corolla is mostly white and may have a flush of purplish-blue, a light green floral tube 14–20 mm (0.55–0.79 in) long with prominent veins. The smooth petals are lance-oblong shaped 9–12 mm (0.35–0.47 in) long and tapering sharply to a point. The fruit are rounded, slightly ribbed and 12–22 mm (0.47–0.87 in) long. Flowering occurs mostly in summer. [3] [4] [5]
This species was first formally described in 1853 by Ferdinand von Mueller and the description was published in Linnaea: ein Journal für die Botanik in ihrem ganzen Umfange, oder Beiträge zur Pflanzenkunde. [6] [7] The specific epithet (petraea) is derived from the Latin petraeus meaning "growing amongst rocks". [8]
It is found on breakways, among rocky outcrops and in rock crevices in the Mid West, Wheatbelt and Goldfields-Esperance regions of Western Australia where it grows in shallow sandy soils over granite. In New South Wales it grows west of Wilcannia mostly on slopes and rocky locations on shallow granite based soils. In South Australia it is a widespread species growing in rocky locations. [2] [3] [5]
Actinodium cunninghamii, commonly known as swamp daisy or Albany daisy, is the only formally described species in the genus of flowering plants in the family Myrtaceae, Actinodium and is endemic to Western Australia.
Acacia glaucoptera, commonly known as flat wattle or clay wattle, is a species of Acacia which is endemic to the south-west of Western Australia.
Grevillea chrysophaea, commonly known as golden grevillea, is a species of flowering plant in the family Proteaceae and is endemic to Victoria in Australia. It is a spreading shrub with oblong to almost linear leaves, and dull to golden yellow flowers with a red or orange-red style.
Calectasia intermedia, commonly known as blue tinsel-lily or eastern tinsel lily is a species of flowering plant in the family Dasypogonaceae, endemic to the border areas of western Victoria and south-eastern South Australia and flowering in early spring. It is the only member of the genus Calectasia that is not endemic to Western Australia.
Grevillea micrantha, also known as small-flower grevillea, is a species of flowering plant in the family Proteaceae and is endemic to Victoria in Australia. It is a spreading shrub with linear leaves and clusters of white to pale pink flowers.
Leptospermum myrsinoides, commonly known as the heath tea-tree or silky tea-tree, is a species of shrub that is endemic to south-eastern continental Australia. It has smooth bark on the younger stems, narrow egg-shaped leaves with the narrower end towards the base, white flowers and fruit that has the remains of the sepals attached but usually falls from the plant soon after the seeds are released.
Prostanthera striatiflora, commonly known as jockey's cap, striated mintbush or striped mintbush, is a species of flowering plant that is endemic to the more arid areas of Australia. It is an erect, aromatic shrub with narrow egg-shaped to narrow elliptic leaves and white flowers with purple lines inside the petal tube.
Goodenia albiflora, commonly known as white goodenia, is a species of flowering plant in the family Goodeniaceae and endemic to South Australia. It is a small, erect shrub with ridged stems, elliptic to egg-shaped, cauline leaves, racemes of white flowers with leaf-like bracteoles at the base, and oval fruit.
Acacia bynoeana, known colloquially as Bynoe's wattle or tiny wattle, is a species of Acacia native to eastern Australia. It is listed as endangered in New South Wales and as vulnerable according to the Environment Protection and Biodiversity Conservation Act 1999.
Pimelea axiflora, commonly known as bootlace bush, is a small shrub in the family Thymelaeaceae and is endemic to Australia. It is a small shrub with whitish flowers on mostly smooth stems.
Sarcozona praecox, commonly known as sarcozona, is species of flowering plant in the family Aizoaceae and is endemic to Australia. It is a small erect to low-lying, succulent shrub with leaves that are triangular in cross-section and arranged in opposite pairs, and daisy-like flowers with twenty to eighty pink, petal-like staminodes and 20 to 150 stamens.
Goodenia calcarata, commonly known as streaked goodenia, is a species of flowering plant in the family Goodeniaceae and is endemic to Australia. It is an erect, annual herb with toothed egg-shaped to oblong leaves, racemes of white, cream-coloured or pink to mauve flowers with brownish markings, and oval fruit.
Goodenia pinnatifida, commonly known as cut-leaf goodenia, scrambled eggs or mother ducks, is a species of flowering plant in the family Goodeniaceae and endemic to Australia. It is a low-lying to ascending perennial herb with toothed to pinnatisect leaves, racemes of yellow flowers and more or less spherical fruit.
Dampiera rosmarinifolia, commonly known as rosemary dampiera, is a flowering plant in the family Goodeniaceae.It is a perennial subshrub with linear leaves, mauve or purple flowers borne in leaf axils.
Spyridium coactilifolium, commonly known as butterfly spyridium, is a species of flowering plant in the family Rhamnaceae. It has white-velvety flowers and oval shaped leaves that are thickly covered in soft hairs.
Olearia muelleri, commonly known as Mueller daisy bush, Mueller's daisy bush or Goldfields daisy, is a species of flowering plant in the family Asteraceae and is endemic to southern continental Australia. It is a compact or spreading shrub with scattered spatula-shaped to egg-shaped leaves with the narrower end towards the base, and white and yellow, daisy-like inflorescences.
Olearia hookeri, commonly known as crimsontip daisybush, is a species of flowering plant in the family Asteraceae and is endemic to Tasmania. It is a sticky shrub with small, narrowly linear leaves and white to bluish-purple and yellow, daisy-like inflorescences.
Olearia picridifolia, commonly known as rasp scrub-daisy, is a species of flowering plant in the family Asteraceae and is endemic to southern continental Australia. It is a low, spreading shrub with narrowly egg-shaped or narrowly elliptic leaves, and blue, mauve or white and yellow, daisy-like inflorescences.
Veronica decorosa, is a flowering plant in the family Plantaginaceae and grows in South Australia. It has white flowers borne on long stems.
Abutilon halophilum is a flowering plant in the family Malvaceae. It is a small understory shrub with yellow or cream-white flowers and hairy oval-shaped leaves and grows in New South Wales, South Australia and the Northern Territory.