Thomasia cognata

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Thomasia cognata
Thomasia cognata.jpg
Near Wedge Island
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malvales
Family: Malvaceae
Genus: Thomasia
Species:
T. cognata
Binomial name
Thomasia cognata

Thomasia cognata is a species of flowering plant in the family Malvaceae and is endemic to the south-west of Western Australia. It is a compact, multi-stemmed shrub with wrinkled, narrowly oblong to elliptic leaves and pale pink flowers.

Contents

Description

Thomasia cognata is a compact, multi-stemmed shrub that typically grows to 0.1–0.7 m (3.9 in – 2 ft 3.6 in) high, 0.5–1 m (1 ft 8 in – 3 ft 3 in) wide and has its stems covered in scattered, star-shaped hairs. The leaves are narrowly oblong to elliptic, 10–40 mm (0.39–1.57 in) long and 3–10 mm (0.12–0.39 in) wide on a petiole 2–3 mm (0.079–0.118 in) long. The edges of the leaves are wavy, the surfaces covered with a few star-shaped hairs. There are leaf-like stipules 6–8 mm (0.24–0.31 in) long at the base of the petioles, but that are shed early. The flowers are arranged in racemes of 2 to 8 up to 80 mm (3.1 in) long, each flower on a pedicel 3–4 mm (0.12–0.16 in) long, with bracteoles 4–6 mm (0.16–0.24 in) long at the base. The sepals are pale pink to purple, 7–8 mm (0.28–0.31 in) long, the petals about 1 mm (0.039 in) long, the style no longer than the stamens. [2] [3]

Taxonomy and naming

Thomasia cognata was first formally described in 1845 by Ernst Gottlieb von Steudel in Lehmann's Plantae Preissianae from specimens collected on Rottnest Island in 1839. [4] [5] The specific epithet (cognata) means "related by birth", referring to its similarity to other species. [2] [6]

Distribution and habitat

This thomasia grows on coastal limestone and sand dunes from near the Murchison River and south to Albany, then east to the east of Esperance in the Esperance Plains, Geraldton Sandplains, Jarrah Forest, Swan Coastal Plain and Warren bioregions of south-western Western Australia. [2] [3]

Conservation status

Thomasia cognata is classified as "not threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions. [3]

Related Research Articles

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<i>Calytrix asperula</i> Species of flowering plant

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<i>Conospermum amoenum</i> Species of Australian shrub

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<i>Conospermum bracteosum</i> Species of Australian shrub

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<i>Hibbertia commutata</i> Species of flowering plant

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<i>Thomasia angustifolia</i> Species of flowering plant

Thomasia angustifolia, commonly known as narrow-leaved thomasia, is a species of flowering plant in the family Malvaceae and is endemic to the south-west of Western Australia. It has densely hairy young stems, narrowly oblong, wrinkled leaves and pinkish-purple, bell-shaped flowers.

<i>Commersonia corniculata</i> Species of plant

Commersonia corniculata is a species of flowering plant in the family Malvaceae and is endemic to the southwest of Western Australia. It is an erect to prostrate shrub with 3-lobed, egg-shaped leaves, and white to cream-coloured flowers.

<i>Hibbertia microphylla</i> Species of flowering plant

Hibbertia microphylla is a species of flowering plant in the family Dilleniaceae and is endemic to the south-west of Western Australia. It is a shrub with weakly ascending stems, broadly egg-shaped to elliptic leaves and yellow flowers, usually with ten stamens and up to nine staminodes arranged on one side of, and leaning over the two densely hairy carpels.

Lasiopetalum indutum is a species of flowering plant in the family Malvaceae and is endemic to the south-west of Western Australia. It is an erect or straggling shrub with hairy stems and pink, cream-coloured or white flowers.

Thomasia discolor is a species of flowering plant in the family Malvaceae and is endemic to the south-west of Western Australia. It is a small, compact shrub with hairy new growth, heart-shaped leaves with wavy, lobed edges, and pink flowers in crowded clusters.

<i>Thomasia macrocalyx</i> Species of grass

Thomasia macrocalyx is a species of flowering plant in the family Malvaceae and is endemic to the south-west of Western Australia. It is an erect, bushy shrub with densely hairy new growth, egg-shaped leaves with a heart-shaped base and lobed or toothed edges, and groups of pale purple to mauve or white flowers.

Thomasia montana, commonly known as hill thomasia, is a species of flowering plant in the family Malvaceae and is endemic to the south-west of Western Australia. It is an upright to low, ground-covering shrub with hairy new growth, egg-shaped to broadly oblong leaves, sometimes with wavy or toothed edges, and pale purplish-pink to maroon flowers.

Cryptandra nutans is a species of flowering plant in the family Rhamnaceae and is endemic to the southwest of Western Australia. It is a shrub that typically grows to a height of 10–60 cm (3.9–23.6 in) and has many stems at ground level. Its leaves are up to 4 mm (0.16 in) long, and the flowers are white, pink or cream-coloured and crowded in spikes on the ends of branches. The sepals are joined at the base to form a broadly bell-shaped tube, less than 2 mm (0.079 in) long with spreading lobes. Flowering occurs in August and September. It was first formally described in 1845 by Ernst Gottlieb von Steudel in Lehmann's Plantae Preissianae from specimens collected in 1840. The specific epithet (nutans) means "nodding".

<i>Cryptandra pungens</i> Species of flowering plant

Cryptandra pungens is a species of flowering plant in the family Rhamnaceae and is endemic to the southwest of Western Australia. It is an erect, slender, spiny shrub that typically grows to a height of 0.2–1 m with many short branches ending with thin spines. Its leaves mostly in bundles and are 4–6 mm (0.16–0.24 in) long. The flowers are white, each on a pedicel 1–2 mm (0.039–0.079 in) long with minute, overlapping brown bracts at the base. The sepals are about 1.6 mm (0.063 in) long and joined at the base to form a broadly bell-shaped tube, with lobes half as long as the tube. Flowering occurs from May to November. The species was first formally described in 1845 by Ernst Gottlieb von Steudel in Lehmann's Plantae Preissianae from specimens collected in sandy forest near Perth. The specific epithet (pungens) means "ending in a sharp, hard point".

Stenanthemum tridentatum is a species of flowering plant in the family Rhamnaceae and is endemic to the southwest of Western Australia. It is a prostrate to upright shrub with sparsely hairy young stems, egg-shaped to fan-shaped leaves, and creamy white or creamy-yellow flowers arranged singly or in groups of up to three.

Thomasia rulingioides is a species of flowering plant in the family Malvaceae and is endemic to the south-west of Western Australia. It is an erect, open shrub with densely hairy new growth, narrowly oblong to narrowly egg-shaped leaves with wavy edges, and pink to purple flowers.

<i>Pimelea tinctoria</i> Species of shrub

Pimelea tinctoria is a species of flowering plant in the family Thymelaeaceae and is endemic to the south-west of Western Australia. It is an erect, spindly shrub with elliptic leaves arranged in opposite pairs, and compact heads of many yellow or yellowish-green flowers usually surrounded by 4 to 7 pairs of egg-shaped to narrowly elliptic yellow and green involucral bracts.

References

  1. "Thomasia cognata". Australian Plant Census. Retrieved 1 January 2023.
  2. 1 2 3 Blake, Trevor L. (2021). Lantern bushes of Australia; Thomasias & allied genera : a field and horticultural guide. Victoria: Australian Plants Society, Keilor Plains Group. pp. 16–17. ISBN   9780646839301.
  3. 1 2 3 "Thomasia cognata". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. "Thomasia cognata". Australian Plant Name Index. Retrieved 1 January 2023.
  5. von Steudel, Ernst G. (1845). Lehmann, Johann G.C.; Preiss, Ludwig (eds.). Plantae preissianae sive enumeratio plantarum quas in australasia occidentali et meridionali-occidentali. Hamburg: Sumptibus Meissneri. p. 232. Retrieved 1 January 2023.
  6. Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 166. ISBN   9780958034180.