Populus × canescens, the grey poplar, is a hybrid between Populus alba (white poplar) and P. tremula (common aspen). It is intermediate between its parents, with a thin grey downy coating on the leaves, which are much less deeply lobed than the leaves of P. alba. It is a very vigorous tree with marked hybrid vigour, reaching 40 metres (130 feet) tall and with a trunk diameter over 1.5 m (5 ft) – much larger than either of its parents. Most trees in cultivation are male, but female trees occur naturally and some of these are also propagated.[2]
Populus alba var. bachofenii (Wierzb. ex Rchb.) Wesm.
Populus alba var. canescens Aiton
Populus × bachofenii Wierzb. ex Rchb.
Populus × hybrida Rchb.
Taxonomyedit
In 1789 William Aiton described the grey poplar as a variety of Populus alba, P. alba var. canescens.[3] In 1804, James Edward Smith raised it to a full species, P. canescens.[1] He described differences between the leaves of the two taxa: P. alba has lobed leaves with snow-white ("niveus") undersides, whereas P. canescens has wavy-edged leaves with hoary ("incanus") undersides.[4] Later authors sometimes noted the possibility that the grey poplar was a hybrid.[5] It is now considered to be a hybrid between P. alba and P. tremula,[6] so the scientific name is written with the hybrid symbol.
Referencesedit
^ abc"Populus × canescens", The Plant List, retrieved 2014-11-28
^Rushforth, K. (1999), Trees of Britain and Europe, Collins, ISBN0-00-220013-9
^"Populus alba var. canescens", The Plant List, retrieved 2014-11-28
^Smith, J.E. (1804), "Populus", Flora Britannica, Volume III, London: J. White, retrieved 2014-11-29, pp. 1079–1080
^Phillips, Roger (1978), Trees in Britain Europe and North America, Pan Macmillan, p. 167, ISBN0-330-25480-4
populus, canescens, grey, poplar, hybrid, between, populus, alba, white, poplar, tremula, common, aspen, intermediate, between, parents, with, thin, grey, downy, coating, leaves, which, much, less, deeply, lobed, than, leaves, alba, very, vigorous, tree, with,. Populus canescens the grey poplar is a hybrid between Populus alba white poplar and P tremula common aspen It is intermediate between its parents with a thin grey downy coating on the leaves which are much less deeply lobed than the leaves of P alba It is a very vigorous tree with marked hybrid vigour reaching 40 metres 130 feet tall and with a trunk diameter over 1 5 m 5 ft much larger than either of its parents Most trees in cultivation are male but female trees occur naturally and some of these are also propagated 2 Populus canescensScientific classificationKingdom PlantaeClade TracheophytesClade AngiospermsClade EudicotsClade RosidsOrder MalpighialesFamily SalicaceaeGenus PopulusSection Populus sect PopulusSpecies P canescensBinomial namePopulus canescens Aiton Sm 1 Synonyms 1 Populus alba var bachofenii Wierzb ex Rchb Wesm Populus alba var canescens Aiton Populus bachofenii Wierzb ex Rchb Populus hybrida Rchb Taxonomy editIn 1789 William Aiton described the grey poplar as a variety of Populus alba P alba var canescens 3 In 1804 James Edward Smith raised it to a full species P canescens 1 He described differences between the leaves of the two taxa P alba has lobed leaves with snow white niveus undersides whereas P canescens has wavy edged leaves with hoary incanus undersides 4 Later authors sometimes noted the possibility that the grey poplar was a hybrid 5 It is now considered to be a hybrid between P alba and P tremula 6 so the scientific name is written with the hybrid symbol References edit a b c Populus canescens The Plant List retrieved 2014 11 28 Rushforth K 1999 Trees of Britain and Europe Collins ISBN 0 00 220013 9 Populus alba var canescens The Plant List retrieved 2014 11 28 Smith J E 1804 Populus Flora Britannica Volume III London J White retrieved 2014 11 29 pp 1079 1080 Phillips Roger 1978 Trees in Britain Europe and North America Pan Macmillan p 167 ISBN 0 330 25480 4 Stace Clive 2010 New Flora of the British Isles 3rd ed Cambridge UK Cambridge University Press ISBN 978 0 521 70772 5 Retrieved from https en wikipedia org w index php title Populus canescens amp oldid 1180038496, wikipedia, wiki, book, books, library,
