Eucalyptus percostata

Eucalyptus percostata, commonly known as the rib-capped mallee or Devils peak mallee,[2] is a species of mallee that is endemic to South Australia. It has smooth bark, lance-shaped adult leaves, flower buds in groups of seven, creamy white flowers and cup-shaped to conical fruit. It is only known from a few locations in the Flinders Ranges.

Rib-capped mallee
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Eucalyptus
Species:
E. percostata
Binomial name
Eucalyptus percostata
Brooker & P.J.Lang[1]

Description

Eucalyptus percostata is a mallee that typically grows to a height of 3–10 m (9.8–32.8 ft) and forms a lignotuber. It has smooth whitish bark that is coppery when new. Young plants and coppice regrowth have broadly lance-shaped to broadly egg-shaped leaves that are 50–100 mm (2.0–3.9 in) long and 30–60 mm (1.2–2.4 in) wide. Adult leaves are the same shade of green on both sides, lance-shaped, 70–120 mm (2.8–4.7 in) long and 12–25 mm (0.47–0.98 in) wide tapering to a petiole 10–22 mm (0.39–0.87 in) long. The flower buds are arranged in leaf axils on a peduncle 8–20 mm (0.31–0.79 in) long, the individual buds sessile or on pedicels up to 2 mm (0.079 in) long. Mature buds are pear-shaped, 8–12 mm (0.31–0.47 in) long and 6–7 mm (0.24–0.28 in) wide with a conspicuously ribbed, rounded to conical operculum. Flowering from May to September and the flowers are creamy white. The fruit is a woody, cup-shaped to conical capsule 6–8 mm (0.24–0.31 in) long and 5–9 mm (0.20–0.35 in) wide with the valves near rim level.[2][3][4][5]

Taxonomy

Eucalyptus percostata was first formally described in 1990 by Ian Brooker and Peter Lang in Journal of the Adelaide Botanic Gardens from material collected on a track east of Devils Peak, near Quorn in 1986.[3][6] The specific epithet (percostata) is from Latin meaning "conspicuously ribbed", referring to the operculum.[4]

Distribution and habitat

Rib-capped mallee grows in woodland and mallee in the southern Flinders Ranges between Quorn and Napperby.[3][5]

See also

References
  1. "Eucalyptus percostata". Australian Plant Census. Retrieved 29 November 2019.
  2. Nicolle, Dean (2013). Native Eucalypts of South Australia. Adelaide: Dean Nicolle. pp. 134–135.
  3. Brooker, M. Ian H.; Lang, Peter J. (1990). "Two new mallee species from South Australia in Eucalyptus L'Hér. series Rufispermae Maiden" (PDF). Journal of the Adelaide Botanic Gardens. 13: 65–70. Retrieved 29 November 2019.
  4. "Eucalyptus percostata". Euclid: Centre for Australian National Biodiversity Research. Retrieved 30 May 2020.
  5. "Eucalyptus percostata (Myrtaceae) Ribbed White Mallee". Seeds of South Australia. Retrieved 29 November 2019.
  6. "Eucalyptus percostata". APNI. Retrieved 29 November 2019.
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