Stenanthemum argenteum

Last updated

Stenanthemum argenteum
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Rosales
Family: Rhamnaceae
Genus: Stenanthemum
Species:
S. argenteum
Binomial name
Stenanthemum argenteum

Stenanthemum argenteum is a species of flowering plant in the family Rhamnaceae and is endemic to a restricted part of Queensland. It is a shrub with hairy branches, lance-shaped to egg-shaped leaves with the narrower end towards the base, and heads of about seven hairy white, tube-shaped flowers.

Contents

Description

Stenanthemum argenteum is a shrub that typically grows to a height of 50–75 cm (20–30 in) and has its branches covered with silvery hairs. Its leaves are lance-shaped to egg-shaped with the narrower end toards the base, 6–16 mm (0.24–0.63 in) long and 2.0–4.9 mm (0.079–0.193 in) wide on a petiole 2–3 mm (0.079–0.118 in) long, with narrowly triangular stipules 2.0–3.1 mm (0.079–0.122 in) long at the base. The upper surface of the leaves is glabrous and the lower surface is densely covered with silvery hairs pressed against the surface. The flowers are borne in groups of 5 to 10 about 5 mm (0.20 in) wide, surrounded by 3 floral bracts and one or two densely hairy floral leaves. The floral tube is 2.0–2.5 mm (0.079–0.098 in) long, the sepals white to creamy-white and joined to form a hairy, cylindrical to urn-shaped tube 2.5–3.0 mm (0.098–0.118 in) long mostly obscured by bracts. The petals are white, form a hood over the stamens and protrude 1.1–1.4 mm (0.043–0.055 in) beyond the sepal tube. Flowering has been observed in May and September. [2] [3] [4]

Taxonomy and naming

Stenanthemum argenteum was first formally described in 2004 by Anthony Bean in the journal Austrobaileya from specimens collected on Mount Mulligan in 1985. [3] [5] The specific epithet (argenteum) means "silvery", referring to the hairs on the branchlets and leaves. [2]

Distribution and habitat

This species grows steep sandstone hills and cliffs in woodland and is only known from Mount Mulligan and Mount Janet in north Queensland. [2]

Conservation status

Stenanthemum argenteum is listed as "vulnerable" under the Queensland Government Nature Conservation Act 1992 . [6]

Related Research Articles

<i>Pomaderris lanigera</i> Species of flowering plant

Pomaderris lanigera, commonly known as woolly pomaderris, is a species of flowering plant in the family Rhamnaceae and is endemic to south-eastern continental Australia. It is a shrub or small tree with hairy stems, lance-shaped to egg-shaped or elliptic leaves, and hemispherical clusters of yellow flowers.

<i>Stenanthemum</i> Genus of flowering plants

Stenanthemum is a genus of flowering plants family Rhamnaceae and is endemic to Australia. Plants in the genus Stenanthemum are small shrubs usually lacking spines. The leaves are arranged alternately along the branches, simple, usually folded in half lengthwise on a short petiole. The flowers are arranged in dense heads, usually on the ends of branches with bracts at the base of the flowers, and there are sometimes whitish floral leaves. The flowers are bisexual, more or less sessile and have five sepals, five petals and a tube-shaped hypanthium, the petals hooded over the stamens. The fruit is a schizocarp containing spotted or mottled seeds.

<i>Spyridium burragorang</i> Species of plant

Spyridium burragorang, is a flowering shrub in the family Rhamnaceae. It has dense clusters of whitish flowers at the end of branches, alternate leaves and is endemic to New South Wales.

Pomaderris clivicola is a species of flowering plant in the family Rhamnaceae and is endemic to a restricted area of Queensland. It is a multi-stemmed shrub with softly-hairy twigs, egg-shaped leaves, and small panicles of yellow to cream-coloured flowers.

Pomaderris graniticola is a species of flowering plant in the family Rhamnaceae and is endemic to eastern Australia. It is a shrub or small tree with hairy young stems, lance-shaped to elliptic leaves, and sparse panicles of yellow, white or cream-coloured flowers.

<i>Pomaderris subcapitata</i> Species of plant

Pomaderris subcapitata is a species of flowering plant in the family Rhamnaceae and is endemic to south-eastern continental Australia. It is a shrub with hairy stems, elliptic to egg-shaped leaves and dense clusters of cream-coloured or yellow flowers.

Pomaderris tropica is a species of flowering plant in the family Rhamnaceae and is endemic to Walshs Pyramid in north Queesland. It is a shrub with softly-hairy branchlets, egg-shaped to elliptic leaves and clusters of white to cream-coloured flowers.

Pimelea aquilonia is a species of flowering plant in the family Thymelaeaceae and is endemic to far north Queensland. It is a shrub with narrowly elliptic leaves and small clusters of hairy, white or cream-coloured, tube-shaped flowers.

<i>Spyridium furculentum</i> Species of shrub

Spyridium furculentum, commonly known as forked spyridium, is a species of flowering plant in the family Rhamnaceae and is endemic to a small area of Victoria in Australia. It is a shrub with softly-hairy young stems, Y-shaped leaves, and head of white to cream-coloured flowers.

Spyridium mucronatum is a species of flowering plant in the family Rhamnaceae and is endemic to the south of Western Australia. It is an erect or spreading shrub usually with narrowly oblong leaves, and dense clusters of up to ten densely hairy, white to yellow flowers.

Spyridium nitidum, commonly known as shining spyridium, is a species of flowering plant in the family Rhamnaceae and is endemic to south-eastern continental Australia. It is an erect, spindly shrub with narrowly elliptic or narrowly egg-shaped leaves with the narrower end towards the base, and heads of hairy, woolly white flowers.

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

Cryptandra armata is a flowering plant in the family Rhamnaceae and is endemic to Queensland. It is a shrub with spiny branchlets, spatula-shaped to lance-shaped or egg-shaped leaves with the narrower end towards the base, and creamy-white tube-shaped to bell-shaped flowers.

Cryptandra beverleyensis is a species of flowering plant in the family Rhamnaceae and is endemic to the southwest of Western Australia. It is a shrub with narrowly oblong leaves and clusters of white, tube-shaped flowers.

Cryptandra ciliata is a species of flowering plant in the family Rhamnaceae and is endemic to south-eastern Queensland. It is a shrub with clustered linear leaves and densely-hairy, white, tube-shaped flowers.

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

Cryptandra debilis is a species of flowering plant in the family Rhamnaceae and is endemic to north Queensland. It is a small shrub with clustered, linear leaves and densely-hairy, white, tube-shaped flowers.

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

Pimelea confertiflora is a species of flowering plant in the family Thymelaeaceae and is endemic to north Queensland. It is a shrub with densely hairy young stems, elliptic or narrowly elliptic leaves and spikes of yellowish-green or yellow, tube-shaped flowers.

Cryptandra exserta is a flowering plant in the family Rhamnaceae and is endemic to inland Western Australia. It is a shrub with narrowly oblong leaves and clusters of white, tube-shaped flowers.

Cryptandra filiformis is a species of flowering plant in the family Rhamnaceae and is endemic to north Queensland. It is a shrub with narrowly elliptic to narrowly lance-shaped leaves and white to creamy-white, tube-shaped flowers.

Stenanthemum arens is a species of flowering plant in the family Rhamnaceae and is endemic to South Australia. It is a twiggy shrub with broadly egg-shaped to almost circular leaves and heads of 10 to 20 silky-hairy white, tube-shaped flowers, usually with whitish floral leaves.

Cryptandra gemmata is a species of flowering plant in the family Rhamnaceae and is endemic to the far north of the Northern Territory. It is a shrub with clustered linear leaves and white to creamy-white, tube-shaped flowers.

References

  1. "Stenanthemum argenteum". Australian Plant Census. Retrieved 29 November 2022.
  2. 1 2 3 Thiele, Kevin R. (2007). "Two new species of Australian Stenanthemum (Rhamnaceae), with a conspectus and key to species outside Western Australia" (PDF). Journal of the Adelaide Botanic Gardens. 21: 66. Retrieved 26 November 2022.
  3. 1 2 Bean, Anthony R. (2004). "New species of Cryptandra Sm. and Stenanthemum Reissek (Rhamnaceae) from northern Australia". Austrobaileya. 6 (4): 935. Retrieved 29 November 2022.
  4. Kellerman, Jurgen; Thiele, Kevin R. Kodela, Phillip G. (ed.). "Stenanthemum argenteum". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 29 November 2022.
  5. "Stenanthemum argentrum". APNI. Retrieved 29 November 2022.
  6. "Stenanthemum argentrum". Queensland Government Department of Environment and Science. Retrieved 29 November 2022.