Melaleuca longistaminea

Melaleuca longistaminea is a plant in the myrtle family Myrtaceae, and is endemic to the south-west of Western Australia. It is a shrub with small, prickly, heart-shaped leaves and heads of yellow to green flowers on the sides of the stems in winter and spring. It is similar to Melaleuca spectabilis which was formerly included in this species but has smaller flowerheads and narrower leaves.

Melaleuca longistaminea
M. longistaminea growing at Red Bluff near Kalbarri.
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Melaleuca
Species:
M. longistaminea
Binomial name
Melaleuca longistaminea
(F.Muell.) Barlow ex Craven
Synonyms[1]

Melaleuca cardiophylla var. longistaminea F.Muell.

Description

Melaleuca longistaminea is a prickly, sprawling, many-branched, woody shrub growing to 2 m (7 ft) tall with glabrous branches and leaves. Its leaves are arranged alternately and are 4.5–13.5 mm (0.2–0.5 in) long, 3–11.5 mm (0.1–0.5 in) wide, egg-shaped to heart-shaped and tapering to a sharp point. They have 11 to 19 parallel veins, giving the leaf the appearance of having fine striations.[1][2]

The flowers are a shade of lime-green to yellow and are arranged in heads on the sides of the branches. The heads are up to 45 mm (2 in) in diameter and composed of 5 to 15 individual flowers. The petals are 3–3.7 mm (0.12–0.15 in) long and fall off as the flower ages. There are five bundles of stamens around the flower, each with 9 to 24 stamens. Flowering occurs between June and October and is followed by fruit which are woody capsules, 3.5–6.5 mm (0.1–0.3 in) long in clusters of 7 to 15 along the branches.[1][2][3]

M. longistaminea leaves and flowers
M. longistaminea fruit

Taxonomy and naming

Melaleuca longistaminea was first named in 1999 by Lyndley Craven in Australian Systematic Botany.[4][5] It was first formally described in 1863 by Ferdinand von Mueller who gave it the name Melaleuca cardiophylla subsp. longistaminea from a specimen collected near the Murchison River.[6] The specific epithet (longistaminea) is derived from the Latin words longus meaning "long"[7]:494 and stamen[7]:798 referring to the relatively long stamens of this species.[1]

Distribution and habitat

Melaleuca longistaminea occurs in and between the Murchison River, Carnamah and Wongan Hills districts[1] in the Avon Wheatbelt and Geraldton Sandplains biogeographic regions.[8] It is found in heath, shrubland, scrub and sandplain growing in sand over sandstone and granite.[1][8][9]

Conservation status

Melaleuca longistaminea is listed as "not threatened" by the Government of Western Australia Department of Parks and Wildlife.[8]

References
  1. Brophy, Joseph J.; Craven, Lyndley A.; Doran, John C. (2013). Melaleucas : their botany, essential oils and uses. Canberra: Australian Centre for International Agricultural Research. p. 234. ISBN 9781922137517.
  2. Holliday, Ivan (2004). Melaleucas : a field and garden guide (2nd ed.). Frenchs Forest, N.S.W.: Reed New Holland Publishers. p. 178. ISBN 1876334983.
  3. Corrick, Margaret G.; Fuhrer, Bruce A. (2009). Wildflowers of southern Western Australia (3 ed.). Kenthurst, N.S.W.: Rosenberg Publishing. p. 132. ISBN 9781877058844. Retrieved 4 June 2015.
  4. "Melaleuca longistaminea". APNI. Retrieved 4 June 2015.
  5. Craven, L. A.; Lepschi, B. J. (1999). "Enumeration of the species and infraspecific taxa of Melaleuca (Myrtaceae) occurring in Australia and Tasmania". Australian Systematic Botany. 12 (6): 883. doi:10.1071/SB98019.
  6. "Melaleuca cardiophylla subsp. longistaminea". APNI. Retrieved 4 June 2015.
  7. Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press.
  8. "Melaleuca longistaminea". FloraBase. Western Australian Government Department of Parks and Wildlife.
  9. Paczkowska, Grazyna; Chapman, Alex R. (2000). The Western Australian flora : a descriptive catalogue. Perth: Wildflower Society of Western Australia. p. 395. ISBN 0646402439.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.