Eucalyptus cosmophylla

Cup gum
Eucalyptus cosmophylla, Kangaroo Island,SA
Eucalyptus cosmophylla, Cranbourne Botanic Gardens, VIC
Scientific classification
Kingdom:Plantae
Clade:Angiosperms
Clade:Eudicots
Clade:Rosids
Order:Myrtales
Family:Myrtaceae
Genus:Eucalyptus
Species: E. cosmophylla
Binomial name
Eucalyptus cosmophylla
Collections data fromAVH
Synonyms[3]

Eucalyptus cosmophylla var. leprosula (Miq.) Maiden
Eucalyptus cosmophylla f. leprosula Miq.
Eucalyptus cosmophylla var. rostrigera Maiden

Eucalyptus cosmophylla (common names cup gum[4], bog gum, scrub gum)[5] is a tree of the genus eucalyptus that is native to South Australia, commonly occurring in the southern Mount Lofty Ranges and Kangaroo Island.[4]

E. cosmophylla grows as multi- or single-stemmed, up to 10 metres tall with cream flowers produced between July and November.[4]

Description

The trees are generally multi-stemmed (mallee), growing to 5 metres (16 ft) high, but are sometimes single-stemmed when they may grow to 10 metres (33 ft).[6] The bark is almost entirely smooth and a pale grey with white/pink areas and sheds in plates.[6] The juvenile leaves have petioles, and are at first opposite and narrow- to broadly elliptic, but become ovate, while the thick, dull, grey-green adult leaves are alternate, narrow- to broad-lanceolate, 10–15 centimetres (4–6 in) long and 2–4 centimetres (1–2 in) broad, on petioles of length 10–30 millimetres (0.4–1.2 in).[6] The cotyledons kidney-shaped.[6]

It flowers from July to November, in shortly pedunculate or sessile umbels of 3 in the axils of the leaves, with the buds on pedicels 0–3 millimetres (0.00–0.12 in) long and 12–15 millimetres (0.5–0.6 in) x 9–10 millimetres (0.4–0.4 in).[6] The operculum is hemispherical to conical with a short and usually shorter than the hypanthium.[6] The flowers are cream-coloured with all anthers being fertile.[6]

The fruit is cylindrical to hemispherical, generally with two ribs, and of size 10–17 millimetres (0.4–0.7 in) x 12–20 millimetres (0.5–0.8 in), with a thick rim, and has broad valves with the tips usually just below the rim. The brown seeds are polyhedral and have narrow wings along the main edges.[6]

See also

References

  1. ↑ "APNI Eucalyptus cosmophylla". Australian Plant Name Index. Retrieved 31 July 2018.
  2. ↑ von Mueller, F.J.H. (1855) Description of fifty new Australian plants, chiefly from the colony of Victoria. Transactions and Proceedings of the Victorian Institute for the Advancement of Science 1: 32
  3. ↑ Govaerts, R. et. al. (2018). "Plants of the world online Eucalyptus bancroftii". Board of Trustees of the Royal Botanic Gardens, Kew. Retrieved 31 July 2018.
  4. 1 2 3 "Eucalyptus cosmophylla (Myrtaceae): Cup Gum". Seeds of South Australia. South Australian Seed Conservation Centre. Retrieved 31 October 2017.
  5. ↑ Black, J.M. (1926), Meliaceae - Scrophulariaceae. Flora of South Australia 3: 419
  6. 1 2 3 4 5 6 7 8 "Fact sheet forEucalyptus cosmophylla". Electronic Flora of South Australia, Government of South Australia. Retrieved 31 July 2018.

Further reading

  • Seberg, O. (1986) New Information on Ferdinand J. H. Mueller's Early Taxonomic Papers (1854-1856). Taxon 35, 262-271.JSTOR</ref>
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