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Eucalyptus cordata Subsp. quadrangulosa (Myrtaceae), a new taxon of restricted distribution from southern Tasmania


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Nicolle, D and Potts, BM and McKinnon, GE (2008) Eucalyptus cordata Subsp. quadrangulosa (Myrtaceae), a new taxon of restricted distribution from southern Tasmania. Papers and Proceedings of the Royal Society of Tasmania, 142 (2). pp. 71-78. ISSN 0080-4703

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Eucalyptus cordata subsp. quadrangulosa is described to accommodate western populations of the species, and differs from the typical
subspecies most conspicuously in the quadrangular branchlets, and also in the larger and more pointed juvenile leaves, the more flattened
peduncles, the larger bi-ribbed flower buds, and the larger fruits. The quadrangular branchlets of the new subspecies are unique in E. ser.
Orbiculares. The new subspecies occurs to the west of, and largely disjunct from, eastern E. cordata, and tends to occupy cooler and wetter
sites. Some morphologically and geographically intermediate populations are known. Both subspecies of E. cordata are of restricted
distribution and are known from relatively few, disjunct and generally numerically small populations, and as such are under threat from
various natural and human-induced influences. The newly described subsp. quadrangulosa is commonly cultivated in cool climates as an
ornamental tree for its silvery foliage. A key to E. ser. Orbiculares, and a distribution map and photographs of representative types of E.
cordata are presented.

Item Type: Article
Keywords: Eucalyptus cordata, Eucalyptus cordata subsp. quadrangulosa, silver gum, Orbiculares, Tasmania, new subspecies
Journal or Publication Title: Papers and Proceedings of the Royal Society of Tasmania
Page Range: pp. 71-78
ISSN: 0080-4703
Collections: Royal Society Collection > Papers & Proceedings of the Royal Society of Tasmania
Additional Information:

BM Potts.

Date Deposited: 03 Dec 2008 05:07
Last Modified: 18 Nov 2014 03:54
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