Hypocalymma phillipsii

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Hypocalymma phillipsii
Hypocalymma phillipsii.jpg
Status DECF P4.svg
Priority Four — Rare Taxa (DEC)
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Hypocalymma
Species:
H. phillipsii
Binomial name
Hypocalymma phillipsii

Hypocalymma phillipsii is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to a restricted part of Western Australia. It is an erect, spreading shrub with elliptic to very broadly egg-shaped leaves, and white flowers arranged singly or in pairs in leaf axils, with 30 to 50 stamens in several rows.

Contents

Description

Hypocalymma phillipsii is an open shrub with many stems, that typically grows to a height of up to 1 m (3 ft 3 in), sometimes to 1.5 m (4 ft 11 in), and 1.5 m (4 ft 11 in) wide. Its leaves are arranged in opposite pairs, elliptic to very broadly egg-shaped, 15–40 mm (0.59–1.57 in) long and 8–20 mm (0.31–0.79 in) wide, with the midrib indented on the upper side and prominent on the lower side. The flowers are mostly borne in pairs in leaf axils and are 14–18 mm (0.55–0.71 in) in diameter, sessile or on a peduncle up to 1 mm (0.039 in) long. The sepal lobes are very broadly egg-shaped to elliptic, 2.0–3.5 mm (0.079–0.138 in) long and 2.5–3.5 mm (0.098–0.138 in) wide. The petals are white, 6–9 mm (0.24–0.35 in) long and there are 30 to 50 stamens in two rows, the longest filaments 4–6 mm (0.16–0.24 in) long. Flowering occurs from September to November and the fruit is 3.0–4.3 mm (0.12–0.17 in) long and 4–5 mm (0.16–0.20 in) wide. [2] [3] [4] [5]

Taxonomy

Hypocalymma phillipsii was first formally described in 1858 by William Henry Harvey in the Natural History Review from specimens raised in the Botanic Gardens of Dublin in 1856–58, from seeds received from the "neighbourhood of King George's Sound", collected by William Phillips. [4] [6] The specific epithet (phillipsii) honours William Phillips, a botanist and schoolmaster. [2]

Distribution and habitat

This species of Hypocalymma is restricted to the Stirling Range, where it grows in sandy soil amongst rocks in dense scrub on hillslopes at altitudes between 400 and 800 m (1,300 and 2,600 ft). [2] [4] [5]

Conservation status

Hypocalymma phillipsii is listed as "Priority Four" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions, [5] meaning that is rare or near threatened. [7]

Related Research Articles

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References

  1. ↑ "Hypocalymma phillipsii". Australian Plant Census. Retrieved 16 October 2024.
  2. 1 2 3 Rye, Barbara L.; Keighery, Greg J. Wege, Juliet A.; Ely, C.J. (eds.). "Hypocalymma phillipsii". Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water: Canberra. Retrieved 16 October 2024.
  3. ↑ 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: 303–304. Retrieved 16 October 2024.
  4. 1 2 3 Strid, P. Arne K.; Keighery, Greg J. (2003). "A taxonomic review of the genus Hypocalymma (Myrtaceae)". Nordic Journal of Botany. 22 (5): 570–572.
  5. 1 2 3 "Hypocalymma phillipsii". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  6. ↑ "Hypocalymma phillipsii". Australian Plant Name Index. Retrieved 16 October 2024.
  7. ↑ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 16 October 2024.
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