Hypocalymma speciosum is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to the Stirling Range in southern Western Australia. It is a bushy shrub with heart-shaped, egg-shaped or circular leaves and deep pink-purple flowers with 25 to 50 stamens in several rows.
| Hypocalymma speciosum | |
|---|---|
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Myrtales |
| Family: | Myrtaceae |
| Genus: | Hypocalymma |
| Species: | H. speciosum
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| Binomial name | |
| Hypocalymma speciosum | |
Description
editHypocalymma speciosum is a bushy shrub that typically grows to a height of 25–70 cm (9.8–27.6 in) and often has many stems. Its young stems are 4-angled and glabrous. The leaves are more or less sessile, heart-shaped, egg-shaped or circular, 4–18 mm (0.16–0.71 in) long and 7–15 mm (0.28–0.59 in) wide. The flowers are mostly 10–12 mm (0.39–0.47 in) wide, arranged singly or in groups of up to four, and are more or less sessile. The sepals are broadly elliptic, 2.0–3.8 mm (0.079–0.150 in) long and white with a red tinge. The petals are deep pink-purple, 6–7 mm (0.24–0.28 in) long, and there are 25 to 50 stamens in two rows forming a ring, the longest filaments 3.5–4.5 mm (0.14–0.18 in) long. Flowering occurs from September to December and the fruit is about 3 mm (0.12 in) long.[2][3][4]
Taxonomy
editHypocalymma speciosum was first formally described in 1852 by Nikolai Turczaninow in Bulletin de la Classe Physico-Mathématique de l'Académie Impériale des Sciences de Saint-Pétersbourg from specimens collected by James Drummond.[5][6] The specific epithet (speciosum) means 'showy'.[7]
Distribution and habitat
editThis species of Hypocalymma grows on rocky slopes in the central and western parts of the Stirling Range, in the Esperance Plains bioregion of southern Western Australia.[2][3]
References
edit- ^ "Hypocalymma speciosum". Australian Plant Census. Retrieved 28 October 2024.
- ^ a b Rye, Barbara L.; Wilson, Peter G.; Keighery, Gregory J. (2013). "A revision of the species of Hypocalymma (Myrtaceae: Chamelaucieae) with smooth or colliculate seeds" (PDF). Nuytsia. 23: 304–305. Retrieved 28 October 2024.
- ^ a b "Hypocalymma speciosum". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
- ^ Strid, P. Arne K.; Keighery, Greg J. (2003). "A taxonomic review of the genus Hypocalymma (Myrtaceae)". Nordic Journal of Botany. 22 (5): 568–569.
- ^ "Hypocalymma speciosum". Australian Plant Name Index. Retrieved 28 October 2024.
- ^ Turczaninow, Nikolai (1852). "Myrtaceae Xerocarpicae, in Nova Hollandia a cl. Drumond". Bulletin de la Classe Physico-Mathématique de l'Académie Impériale des Sciences de Saint-Pétersbourg. 10: 332–333. Retrieved 14 October 2024.
- ^ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 310. ISBN 9780958034180.