Pterocelastrus echinatus

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White cherrywood
Pterocelastrus echinatus, habitus, Little Eden.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Celastrales
Family: Celastraceae
Genus: Pterocelastrus
Species:
P. echinatus
Binomial name
Pterocelastrus echinatus
Synonyms
  • Pterocelastrus rehmannii Davidson
  • Pterocelastrus variabilis sensu Sim
  • Gymnosporia nyasica Burtt Davy & Hutch.
  • Pterocelastrus galpinii Loes.

Pterocelastrus echinatus ('pterocelastrus' = winged holly, 'echinatus' = spiny) is a small Southern African tree occurring in South Africa, Mozambique, Zimbabwe, Eswatini, and Malawi. This species is found in montane and submontane evergreen forests, forest margins, rocky hillsides, and kloofs, growing between 600 and 2400 m above sea level. [1]

Contents

Also known as white cherrywood or witkersiehout, this species is found as a shrub or small tree. It has pale grey bark, with bright orange underbark on young shoots which are angular with spirally arranged, entire, glabrous leaves, elliptic to lanceolate, somewhat leathery and glossy, dark green above, and paler below, margins often revolute. Petioles may be up to 8 mm long, often with a wine-red colour extending into the midrib. Fragrant flowers are small, white to cream, and in axillary clusters. The fruit a three-celled woody dehiscent capsule 6–8 mm long, yellow to orange to red when mature, each valve with one to three bluntly pointed to winglike protuberances and each seed almost entirely enveloped by an aril. [2] The venerable Kew taxonomist N. E. Brown first published his description of P. echinatus in 1906 in the 'Bulletin of Miscellaneous Information Kew' 1906: 16. (Bull. Misc. Inform. Kew)

The wood and roots produce resin which was used by Bantu tribes for attaching spear heads to the shafts. The attractive wood is pink to red in colour, resembling European cherry wood ( Prunus avium ), and is dense and moderately durable. In the past, it was used in wagon-building for pivot-plates (schamels) and spokes. It is suitable for turnery and cabinet-making. [3]

The tree is host to a number of moth species from the family Geometridae - Aphilopota patulata, A. subalbata, Drepanogynis costipicta, and D. olearis. [4]

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Branches dull brown or blackish, cylindric, pubescent or glabrous. Petiole 1·5–6·5 cm. long, almost cylindric, narrowly canaliculate and marginate above, pubescent or glabrous. Leaflets ± dull red-brown, ovate or ovate-lanceolate, acuminate, entire and ± undulate at the margin, membranous to ± rigid or subcoriaceous, glabrous or ± pubescent on the margin, midrib and nerves; median leaflet (3)6–13(16) × (1·2)2·5–4(7) cm., cuneate and frequently petiolulate at the base, the lateral ones (2)2·5–7(12) × (0·8)1·3–3·5(5·5) cm., asymmetric and slightly cuneate or somewhat rounded at the base, very shortly petiolulate to sessile; midrib slightly raised in the upper surface, very prominent below; lateral nerves arcuate, slender, raised on both sides, reticulation lax, almost invisible or sometimes conspicuous. Panicles terminal and axillary, ample, pyramidal, much branched, multiflorous, the terminal ones longer than the leaves, the axillary ones as long as the latter or somewhat longer; pedicels 1–2·5 mm. long. Male flowers: calyx-segments 0·5 mm. long, ovate, obtuse, glabrous; petals c. 1·5 mm. long, elliptic, obtuse; filaments c. 1 mm. long. Female flowers: ovary ovoid; styles reflexed; disk cupuliform, 5-lobulate; staminodes present. Drupe pinkish-yellow to reddish-brown, shining, (4)5(6) mm. in diam., globose, glabrous.

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References

  1. "Pterocelastrus echinatus in Global Plants on JSTOR". plants.jstor.org. Retrieved 2017-08-04.
  2. "Flora of Zimbabwe: Species information: Pterocelastrus echinatus". www.zimbabweflora.co.zw. Retrieved 2017-08-04.
  3. "Report on the Natal Forests" - H. G. Fourcade (1889)
  4. "AfroMoths". www.afromoths.net. Retrieved 2017-08-04.