Angophora Hispida Descriptive Essay

Angophora hispida

Dwarf Apple, Scrub Apple

Angophora hispida (Sm.) Blaxell

Angophora hispida, the Dwarf Apple or Scrub Apple, with its twisted growth habit, gnarled branches and rough loose bark would make an interesting addition to a garden of Australian character. Its young branches and inflorescences covered with reddish hairs throughout the year heighten its appeal.

It occurs naturally on scrubby ridges in parts of the Hawkesbury sandstone area between the Royal National Park and Gosford, New South Wales as a shrub or small twisted tree up to 6 m in height.

Confined to Australia, there are thirteen species of evergreen trees and shrubs within this genus which belongs to the family Myrtaceae and the closely related genera Corymbia and Eucalyptus. Their botanical characteristics differ in that Angophora has opposite leaves whereas in Corymbia and Eucalyptus they are mostly alternate, except for juvenile leaves and several species that retain this type of foliage throughout their life.

The leaves do not have the oily smell of most eucalypts and there is no operculum or cap covering the undeveloped flowers as there is in the other two genera.

The flowers of Angophora hispida are rather large with 4-6 in each cyme (the inflorescence) forming a fairly dense terminal cluster. They are typical of so many Myrtaceae genera in that their chief attractive feature is the numerous stamens which form a circular spreading mass. The filaments are white and the anthers yellow.

The flowering period is in January when clusters of creamy white flowers provide a striking contrast against a background of olive-green leaves.

The leaves are leathery, heart-shaped and without a stalk while the fruit is a capsule which is distinctly ribbed with five triangular-shaped 'calyx teeth' adhering to their rims. When ripe the capsule opens suddenly to release three flat seeds, so the tree must be kept under observation if its seed is to be collected.

Although this species is not commonly grown in Canberra it is worthy of cultivation, particularly as a feature specimen in a corner of the garden which is not too exposed. There are two fully grown specimens of A. hispida in the Australian National Botanic Gardens and no pests or diseases have been apparent. During the flowering season, colourful beetles are attracted to the nectar-laden blossoms as are numerous birds.

Propagation is from seed which may be germinated in a mixture of coarse washed river sand and perlite. On planting out, some protection from frost may be necessary until the plant becomes established. The plants will benefit from the application of a complete fertilizer in spring. If preferred Dwarf Apple can be kept as a shrub for a number of years by periodic pruning.

Text by ANBG staff (1976) with minor revision in 2002.

Name meaning: Angophora hispida

Angophora - derived from Greek words, aggos, a vessel,and phero, to bear, an allusion to the shape of the fruit;

hispida - covered with coarse erect hairs

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Dwarf Apple, Scrub Apple

Angophora hispida (Sm.) Blaxell, Kew Bull. 31: 272 (1976).

Metrosideros hispida Sm., Trans. Linn. Soc. London 3: 267 (1797); Eucalyptus hispida (Sm.) Brooker, Austral. Sys. Bot. 13: 136 (2000). T: Port Jackson, NSW, 1795, J.White s.n.; holo: LINN.

Angophora cordifolia Cav., Icon 4: 21, t. 338 (1797); Metrosideros cordifolia (Cav.) Pers., Syn Pl. 2: 25 (1806). T: ex Port Jackson, NSW, collector unknown; holo: MA.

Metrosideros hirsuta Andrews, Bot. Repos. 4, t. 281 (1803). T: t. 281 in H.C.Andrews, loc. cit.; lecto: the original plate, fide G.J.Leach, Telopea 2: 773 (1986).

Metrosideros anomala
Vent., Jard. Malm. 5, t. 5 (1803). T: t. 5 in E. P.Ventenat, loc. cit.; lecto: the original plate, fide G.J.Leach, Telopea 2: 773 (1986).

Eucalyptus hirsuta Link, Enum. Hort. Berol. 2: 31 (1822). T: destroyed at B.

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Description

Large shrub to small tree, 1.5 �8 m tall. Forming a lignotuber.
Bark rough to the small branches, fibrous, grey to grey-brown. Oil glands not seen in the pith but expected to be found on young branchlets at the nodes.
Juvenile stem rounded in cross-section, pubescent; juvenile leaves opposite, sessile, ovate, 10�14 cm long, 4�6 cm wide, base amplexicaul, margin entire, apex acute, green, pubescent or glabrous.
Adult leaves opposite, sessile (or rarely petiolate), petioles 0�0.4 cm long; blade ovate to elliptical to cordate, 5�11.5 cm long, 2�6 cm wide, usually thick and rigid, undulate to flat, base amplexicaul, margin entire or occasionally crenulate, apex usually rounded, sometimes acute, discolorous, slightly glossy, green to olive green to dull grey-green, penniveined, very densely reticulate, intramarginal vein present or absent, oil glands obscure or apparently absent, laminaglabrous to moderately pubescent.
Inflorescencesterminal, peduncles 1.5�7 cm long; buds 3 or 7 per umbel, pedicellate (pedicels 0.8�3.2 cm long). Mature budsglobular (0.9�1.3 cm wide, 0.7�1.3 cm wide), hypanthiumpubescent, longitudinally ribbed, petals white with a green keel, stamensinflexed, anthersoblong, versatile, dehiscing by longitudinal slits (non-confluent), style long, stigma blunt, mop-like, locules 3 or 4, the placentae each with 5 vertical ovule rows. Flowers white to creamy white, or yellow to lemon, or pink (rarely).
Fruitpedicellate (pedicels 0.8�3.6 cm long), cup-shaped, 1.5�2.6 cm long, 1.3�2 cm wide, longitudinally ribbed, disc level or descending, valves 3 or 4, enclosed.
Seed reddish brown to brown, 8�10 mm long, flattened-ellipsoidal, dorsal surface smooth, hilumventral.

Cultivated seedlings (measured at ca node 10):cotyledonsreniform to orbicular; stems rounded in cross-section, scabrid with bristle-glands and hairs; leaves opposite, sessile, cordate to oblong, 5�9(10) cm long, 2.5�5(5.5) cm wide, amplexicaul, margin entire or irregular, apex pointed, discolorous, green, scabrid.

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Notes

A. hispida belongs in the group of Angophora which is diagnosed by the rough bark and the � sessilejuvenile leaves persisting in the crown of the adult plant.

It is a mallee or small tree confined to the Central Coast of New South Wales, ranging from just south of Sydney north to the Gosford area. A. subvelutina, of the same group, differs by being a taller tree with soft leaves (usually thick and rigid in A. hispida) and by having smaller fruit (normally 0.8�1.1 cm long and 0.6�1.1 cm wide in A. subvelutina, but 1.2�1.7 cm long and 1.2�1.6 cm wide in A. hispida). A. robur, also of the same group, has a similar habit, buds, fruit  and the thick, rigid leaves like A. hispida but has slightly larger leaves usually with pointed tips (usually obtuse in A.hispida).

MORE ABOUT ANGOPHORA

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Flowering Time

Flowering has been recorded in September, November, December, January, February and May.

Origin of Name

Angophora hispida: Latin hispidus, rough to the touch, of the leaves.

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