Pimelea williamsonii

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Pimelea williamsonii
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malvales
Family: Thymelaeaceae
Genus: Pimelea
Species:
P. williamsonii
Binomial name
Pimelea williamsonii

Pimelea williamsonii, commonly known as Williamson's rice-flower, [2] is a species of flowering plant in the family Thymelaeaceae and is endemic to the southern continental Australia. It is a bushy annual subshrub with more or less elliptic leaves and elongated heads of many hairy, brownish flowers.

Contents

Description

Pimelea williamsonii is a bushy annual subshrub that typically grows to a height of 10–30 cm (3.9–11.8 in) and has densely hairy young stems. The leaves are more or less elliptic, 7–15 mm (0.28–0.59 in) long and 2–4 mm (0.079–0.157 in) wide on a short petiole. The flowers are bisexual, arranged on the ends of branches in elongated heads up to 65 mm (2.6 in) long. Each flower is on a hairy pedicel, the flower tube about 3 mm (0.12 in) long, the sepals about 1 mm (0.039 in) long, the flowers brownish and covered with short white and long brown hairs. Flowering occurs in most months with a peak in October and November. [2] [3] [4]

Taxonomy

Pimelea williamsonii was first formally described in 1919 by John McConnell Black in the Transactions and Proceedings of the Royal Society of South Australia . [5] [6] The specific epithet (williamsonii) honours Herbert Bennett Williamson who discovered the species near Pinnaroo in 1917. [6]

Distribution and habitat

Williamson's rice-flower grows in sand from the Eyre Peninsula and Billiatt Conservation Park in south-eastern South Australia to Annuello and Hattah-Kulkyne National Park in north-western Victoria. [2] [3] [4]

Related Research Articles

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<i>Pimelea microcephala</i> Species of plant

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<i>Pimelea humilis</i> Species of plant

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

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<i>Pimelea serpyllifolia</i> Species of plant


Pimelea serpyllifolia, commonly known as thyme riceflower, is a species of flowering plant in the family Thymelaeaceae and is endemic to southern Australia. It is an erect shrub with narrowly elliptic to spatula-shaped leaves, and compact heads of 4 to 12 yellow, yellowish-green or white flowers surrounded by 2 or 4 leaf-like involucral bracts. Male and female flowers are borne on separate plants.

<i>Pimelea ligustrina</i> Species of plant

Pimelea ligustrina is a species of flowering plant in the family Thymelaeaceae, and is endemic to south-eastern Australia. It is a shrub with lance-shaped or narrowly elliptic leaves arranged in opposite pairs, and clusters of creamy-white, white or pinkish flowers usually surrounded by 4 or 8, greenish to reddish brown involucral bracts.

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

Pimelea drupacea, commonly known as cherry rice-flower, is a species of flowering plant in the family Thymelaeaceae and is endemic to south-eastern Australia. It is a shrub with elliptic leaves arranged in opposite pairs, and head-like clusters of white, tube-shaped flowers surrounded by two or four leaves.

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

Pimelea treyvaudii, commonly known as grey rice-flower, is a species of shrub in the family Thymelaeaceae. It has white flowers in spherical heads at the end of branches and is endemic to eastern Australia.

<i>Pimelea curviflora</i> Species of plant

Pimelea curviflora, also known as curved rice-flower, is a shrub in the family Thymelaeaceae and is endemic to Australia. It is a small, hairy shrub with greenish-yellow or red tubular flowers.

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

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.

Pimelea biflora, commonly known as matted rice-flower, is a species of flowering plant in the family Thymelaeaceae and is endemic to south-eastern continental Australia. It is a prostrate, mat-forming shrub with elliptic leaves and dark red flowers always arranged in pairs on the ends of branches.

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

Pimelea trichostachya, commonly known as annual riceflower, spiked riceflower or flax weed, is a species of flowering plant in the family Thymelaeaceae and is endemic to continental Australia. It is a slender, semi-woody, annual shrub with narrowly elliptic or linear leaves and densely hairy, white or yellow flowers and green, purple-tinged fruit. It is toxic to livestock.

<i>Pimelea interioris</i> Species of flowering plant

Pimelea interioris is a species of flowering plant in the family Thymelaeaceae and is endemic to a restricted part of the south of the Northern Territory of Australia. It is a shrub with hairy, narrowly elliptic leaves and clusters of creamy-white to pale yellow, separate male and female flowers.

Pimelea macrostegia is a species of flowering plant in the family Thymelaeaceae and is endemic to Kangaroo Island in South Australia. It is a shrub with glabrous, narrowly elliptic leaves and clusters of pale yellow flowers surrounded by 4 or 6 egg-shaped, pale green involucral bracts.

Pimelea micrantha, commonly known as silky rice-flower is a species of flowering plant in the family Thymelaeaceae and is endemic to southern Australia. It is a much-branched undershrub with narrowly elliptic to lance-shaped leaves and compact clusters or heads of densely hairy, creamy white flowers.

Pimelea penicillaris, commonly known as sandhill riceflower, is a species of flowering plant in the family Thymelaeaceae and is endemic to Central Australia. It is an erect, dioecious shrub with densely hairy young stems, densely hairy, pale silvery green, elliptic leaves, and compact heads of white to yellow or pink flowers surrounded by 6 to 12 silky-hairy, silvery or brownish involucral bracts.

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

Pimelea phylicoides, commonly known as heath rice-flower, is a species of flowering plant in the family Thymelaeaceae and is endemic to southern continental Australia. It is an erect shrub with densely hairy young stems, narrowly egg-shaped to elliptic leaves, and heads of white flowers surrounded by 3 to 6 involucral bracts.

<i>Pimelea simplex</i> Species of plant

Pimelea simplex, commonly known as desert rice-flower, is a species of flowering plant in the family Thymelaeaceae and is endemic to inland Australia. It is a herb or semi-woody annual with narrowly elliptic to linear leaves, and compact heads of densely hairy white to yellowish-green flowers.

<i>Pimelea stricta</i> Species of plant

Pimelea stricta, commonly known as gaunt rice-flower, is a species of flowering plant in the family Thymelaeaceae and is endemic to south-eastern continental Australia. It is an erect shrub with narrowly elliptic or linear leaves, and compact heads of densely hairy, creamy-white to yellow flowers surrounded by 4 egg-shaped involucral bracts.

<i>Pimelea umbratica</i> Species of plant

Pimelea umbratica, is a species of flowering plant in the family Thymelaeaceae and is endemic to eastern Australia. It is a shrub with densely hairy young stems, narrowly elliptic or more or less oblong leaves, and white flowers arranged singly, or in small groups, in leaf axils.

References

  1. "Pimelea williamsonii". Australian Plant Census. Retrieved 20 April 2023.
  2. 1 2 3 Entwisle, Timothy J.; Stajsic, Val. "Pimelea williamsonii". Royal Botanic Gardens Victoria. Retrieved 20 April 2023.
  3. 1 2 Rye, Barbara L. "Pimelea williamsonii". Flora of Australia. Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 20 April 2023.
  4. 1 2 "Pimelea williamsonii". State Herbarium of South Australia. Retrieved 20 April 2023.
  5. "Pimelea williamsonii". APNI. Retrieved 20 April 2023.
  6. 1 2 Black, John M. (1919). "Additions to the Flora of South Australia. No. 15". Transactions and Proceedings of the Royal Society of South Australia. 43: 37. Retrieved 20 April 2023.