Calytrix ecalycata

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Calytrix ecalycata
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Calytrix
Species:
C. ecalycata
Binomial name
Calytrix ecalycata
Synonyms [1]

Calythropsis aureaC.A.Gardner

Calytrix ecalycata is a species of flowering plant in the myrtle family Myrtaceae and is endemic to the south-west of Western Australia. It is a slender, erect shrub with linear to narrowly elliptic leaves, and yellow flowers with 35 to 50 stamens in several rows.

Contents

Description

Calytrix ecalycata is a slender, erect shrub that typically grows to a height of up to 1.6 m (5 ft 3 in). Its leaves are arranged alternately, elliptic, linear to narrowly elliptic, 3–9 mm (0.12–0.35 in) long and 0.50–0.75 mm (0.020–0.030 in) wide on a petiole 0.5 mm (0.020 in) long. The flowers are borne in clusters 10–20 mm (0.39–0.79 in) wide on a peduncle about 0.5 mm (0.020 in) long. The floral leaves are shorter and broader than the stem leaves, linear or elliptic, 3–6 mm (0.12–0.24 in) long and 1–2 mm (0.039–0.079 in) wide. The floral tube is glabrous 4–6 mm (0.16–0.24 in) long, has 4 ribs. There are no sepals and the petals are yellow, narrowly elliptic to oblong, 5–7 mm (0.20–0.28 in) long and about 2 mm (0.079 in) wide. There are 35 to 50 yellow stamens 4–8 mm (0.16–0.31 in) long in several rows. Flowering time varies with subspecies. [2] [3]

Taxonomy

This species was first formally described in 1943 by Charles Gardner who gave it the name Calythropsis aurea in the Journal of the Royal Society of Western Australia from specimens collected near the Arrowsmith River by William Blackall. [4] [5] In 1990, Lyndley Craven found the genus Calythropsis to be congeneric with Calytrix in Australian Systematic Botany , and gave it the new name Calytrix ecalycata. [6] [7] The specific epithet (ecalycata) means 'having no calyx'. [8] In 2004, Greg Keighery described 3 subspecies of Calytrix ecalycata in the journal Nuytsia and the names are accepted by the Australian Plant Census:

Distribution and habitat

This species of Calytrix grows on sandplains, flats, ridges, hills and roadsides between Port Gregory and Regans Ford in the Avon Wheatbelt, Geraldton Sandplains, Swan Coastal Plain bioregions of south-western Western Australia. [3] [2] The 3 subspecies occur in the same area, subspecies brevis on sandplains and low rises in mallee shrubland and mixed shrubland from Coorow to near Moora and south to Regans Ford, [2] [10] subsp. ecalycata in winter-wet wandoo woodland, Melaleuca uncinata shrubland, mixed low heath and Eucalyptus eudesmioides mallee. [2] [12] Subspecies pubescens is only known from the type location south-west of Moora, where it grows in wandoo woodland. [2] [14]

Conservation status

The species Calytrix ecalycata is listed as "not threatened" [3] but subspecies brevis and ecalycata are classed as "Priority Three by the Government of Western Australia Department of Biodiversity, Conservation and Attractions [10] [12] meaning that they are poorly known and known from only a few locations but are not under imminent threat, and subspecies pubescens as "Priority One" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions, [14] meaning that it is known from only one or a few locations that are potentially at risk. [15]

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References

  1. 1 2 "Calytrix ecalycata". Australian Plant Census. Retrieved 24 August 2024.
  2. 1 2 3 4 5 6 7 8 Keighery, Gregory J. (2004). "Taxonomy of the Calytrix ecalycata complex (Myrtaceae)". Nuytsia. 15 (2): 265–268. Retrieved 24 August 2024.
  3. 1 2 3 "Calytrix ecalycata". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. "Calythropsis aurea". Australian Plant Name Index. Retrieved 24 August 2024.
  5. Gardner, Charles A. (1943). "Contributiones Florae Australiae Occidentalis, XI". Journal of the Royal Society of Western Australia. 27: 189. Retrieved 24 August 2024.
  6. "Calytrix ecalycata". Australian Plant Name Index. Retrieved 24 August 2024.
  7. Craven, Lyndley (1990). "Three additional species in Calytrix (including the reduction of Calythropsis), and notes on Calytrix exstipulata (Myrtaceae)". Australian Systematic Botany. 3 (4): 719–725. Retrieved 24 August 2024.
  8. Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 188. ISBN   9780958034180.
  9. "Calytrix ecalycata subsp. brevis". Australian Plant Census. Retrieved 24 August 2024.
  10. 1 2 3 "Calytrix ecalycata subsp. brevis". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  11. "Calytrix ecalycata subsp. ecalycata". Australian Plant Census. Retrieved 24 August 2024.
  12. 1 2 3 "Calytrix ecalycata subsp. ecalycata". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  13. "Calytrix ecalycata subsp. pubescens". Australian Plant Census. Retrieved 24 August 2024.
  14. 1 2 3 "Calytrix ecalycata subsp. pubescens". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  15. "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Biodiversity, Conservation and Attractions. Retrieved 24 September 2023.