Stenanthemum nanum

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Stenanthemum nanum
Stenanthemum nanum - Flickr - Kevin Thiele.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Rosales
Family: Rhamnaceae
Genus: Stenanthemum
Species:
S. nanum
Binomial name
Stenanthemum nanum

Stenanthemum nanum is a species of flowering plant in the family Rhamnaceae and is endemic to the south-west of Western Australia. It is a prostrate shrub with hairy young stems, broadly egg-shaped leaves with the narrower end towards the base, and densely silvery-hairy heads of white or cream-coloured flowers.

Contents

Description

Stenanthemum nanum is a spreading, more or less prostrate shrub that typically grows to a height of up to 10 cm (3.9 in), its young stems covered with straight and star-shaped hairs. Its leaves are broadly egg-shaped to egg-shaped with the narrower end towards the base, 5–8 mm (0.20–0.31 in) long and 3–5 mm (0.12–0.20 in) wide on a hairy petiole 0.8–2 mm (0.031–0.079 in) long, with stipules joined together for their lower one-third. There are two teeth on each side of the end of the leaf and the lower surface is densely covered with straight and star-shaped hairs. The flowers are white or cream-coloured and arranged in clusters of 5 to 15, 4–6 mm (0.16–0.24 in) wide, surrounded by broadly egg-shaped bracts 2–3 mm (0.079–0.118 in) long. The floral tube is 1.6–1.8 mm (0.063–0.071 in) long and densely hairy, the sepals about 1 mm (0.039 in) long and the petals 0.7–0.8 mm (0.028–0.031 in) long. Flowering occurs in October and November, and the fruit is a densely hairy schizocarp 2.2–2.5 mm (0.087–0.098 in) long. [2] [3]

Taxonomy and naming

Stenanthemum nanum was first formally described in 1995 by Barbara Lynette Rye in the journal Nuytsia from specimens collected by Alex George, 50 km (31 mi) south-east of Perth in 1965. [2] [4] The specific epithet (nanum) means "dwarf", referring to the size of the plant. [2]

Distribution and habitat

This species grows in woodland and forest from east of Armadale to near Boddingtonin the Jarrah Forest bioregion of south-western Western Australia. [2] [3] [5]

Conservation status

Stenanthemum nanum is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions [5]

Related Research Articles

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Stenanthemum yorkense is a species of flowering plant in the family Rhamnaceae and is endemic to an area near York in the southwest of Western Australia. It is a low, spreading shrub with egg-shaped leaves, the narrower end towards the base, and densely crowded, head-like clusters of white, tube-shaped flowers with a yellow centre.

References

  1. ↑ "Stenanthemum nanum". Australian Plant Census. Retrieved 7 January 2023.
  2. 1 2 3 4 Rye, Barbara L. (1995). "New and priority taxa in the genera Cryptandra and Stenanthemum (Rhamnaceae) of Western Australia". Nuytsia. 10 (2): 291–293. Retrieved 7 January 2023.
  3. 1 2 Kellerman, Jurgen; Thiele, Kevin R. Kodela, Phillip G. (ed.). "Stenanthemum nanum". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 7 January 2023.
  4. ↑ "Stenanthemum nanum". APNI. Retrieved 7 January 2023.
  5. 1 2 "Stenanthemum nanum". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
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