Abrophyllum

Abrophyllum (syn.: Brachynema F.Muell.) is a monotypic genus of flowering plants in the family Saxifragaceae sensu lato according to Engler, A. in Engler & Prantl and Schulze-Menz, G. K. in Melchior, 1964; placed in Subfamily Escallonioideae, Tribe Cuttsieae, it is closely related to Cuttsia. In the APG II system Abrophyllum is placed in family Rousseaceae.

Abrophyllum
Leaves and fruits of Abrophyllum ornans at Elvina Bay, Australia.
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Rousseaceae
Subfamily: Carpodetoideae
Genus: Abrophyllum
Hook.f. ex Benth.
Species:
A. ornans
Binomial name
Abrophyllum ornans

The sole species is Abrophyllum ornans. Its common name is native hydrangea, but it does not have great affinity with the true hydrangea.

Classification

It is also classified in Escalloniaceae (by Hutchinson 1967; Dahlgren; Thorne), Grossulariaceae (Cronquist 1988), Carpodetaceae (APG I 1998, Kubitzki 2007[1]), Rousseaceae (APG II 2003, Shipunov 2005, Thorne & Reveal 2007[2] and Heywood et al. 2007[3]), or even in its own family Abrophyllaceae Nakai (Reveal and Takhtajan 1997).

Distribution

It is native to Australia (New South Wales and Queensland). Its habitat is warm-temperate and subtropical rainforest, especially along smaller watercourses or in gullies on poorer soils. The natural range of distribution is from the Illawarra of New South Wales to the McIlwraith Range in far north eastern Australia.[4]

Description
Abrophyllum ornans in Engler & Prantl

Shrubs or small trees to 8 m high; leaves simple, mostly 10–20 cm long, 3–8 cm wide, alternate, large, lanceolate, long-acuminate, subserrate; without stipules, petiole 20–40 mm long. Flowers in terminal or axillary cymes, yellowish. Calyx is short (c. 2 mm long.), tubular, lobes usually 5 or sometimes 6, deciduous. Petals 4–5 mm long, usually 5 or sometimes 6, valvate, spreading, deciduous. Stamens usually 5 or sometimes 6, inserted on the margin of the inconspicuous nectary disk; anthers broad oblong; filaments very short. Gynoecium of 5 carpels, receptacle patelliform. Ovary superior, 5-locular, with numerous axile ovules, stigma sessile, 5-lobed. Fruit a small (8–12 mm long, 5–7 mm wide), oblong, dark, mainly black berries, crowned by the stigma, many-seeded; seeds small, subglobose, testa deeply latticed; embryo very small; endosperm fleshy and oily.

Uses

Sometimes (locally) cultivated for its ornamental foliage and fruits.

References
  1. Gustafsson, M.H.G. (2007). "Carpodetaceae". In Kubitzki, K.; Kadereit, J. W.; Jeffrey, C. (eds.). The Families and Genera of Vascular Plants. Vol. 8. Berlin: Springer-Verlag. ISBN 3-540-31050-9.
  2. Thorne, R. F. & Reveal, J. L. 2007. An updated classification of the class Magnolipsida ("Angiospermae"). Bot. Rev. 73(2): 67-182.
  3. Heywood, V. H.; Brummitt, R. K.; Culham, A.; Seberg, O. (2007). Flowering Plant Families of the World. Richmond Hill, Ontario, Canada: Firefly Books. ISBN 1-55407-206-9.
    • Floyd, Alexander G., Rainforest Trees of Mainland South-eastern Australia, Inkata Press 1989, ISBN 0-909605-57-2, page 126

Bibliography
  • Bentham, G. & Hooker, J. D. (1862-1867). Genera Plantarum.Volume I, p. 647. Reeve, London
  • Engler, A. (1930). Saxifragaceae. In Engler, A. & Prantl, K.:Die Natürlichen Pflanzenfamilien, 18a, 2nd Edition, p. 213. (In German)
  • Schulze-Menz, G.K. (1964). Rosales. In H. Melchior (Editor). A. Engler's: Syllabus der Pflanzenfamilien, Volume II, 12th edition. Berlin: Gebrüder Borntraeger, pp. 193–242.
  • Hutchinson, J.(1967):The Genera of Flowering Plants, Volume II, p. 30.
  • Gustafsson, M. H. G. & Bremer, K. (1997). The circumscription and systematic position of Carpodetaceae.Australian Systematic Botany 10(6): 855–862. [It is proposed that the family Carpodetaceae be expanded to encompass Abrophyllum and Cuttsia.]
  • Takhtajan, A. (1997). Diversity and classification of flowering plants, 370–373. ISBN 0-231-10098-1
  • Hils, M. H. (1985). Comparative anatomy and systematics of twelve woody Australasian genera of the Saxifragaceae. Matthew Hils: Florida xvi, 239, [33]p. - illus. Icones, Anatomy and morphology. Thesis: University of Florida: PhD [including Abrophyllum]
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