Leaf and stem cold hardiness of 17 broadleaf evergreen taxa

The leaves and stems of 17 broadleaf evergreen taxa were screened for cold hardiness in laboratory tests. Leaves of Ilex were generally less cold hardy than stems. However, the leaves of I. × koehneana ‘Wirt L. Winn’, Ilex latifolia and Ilex ‘Lydia Morris’ were equal to or more cold hardy than the s...

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Bibliographic Details
Published in:Journal of environmental horticulture 1990-06, Vol.8 (2), p.71-73
Main Authors: Dirr, M.A. (University of Georgia, Athens, GA), Lindstrom, O.M. Jr
Format: Article
Language:English
Subjects:
ADAPTABILITY
ADAPTACION
ADAPTATION
COLD
ESPECE
ESPECIES
FEUILLE
FRIO
FROID
HOJAS
ILEX
LEAVES
OLEACEAE
OSMANTHUS
PRUNUS LAUROCERASUS
RESISTANCE A LA TEMPERATURE
RESISTENCIA A LA TEMPERATURA
SCREENING
SPECIES
SPECIES DIFFERENCES
STEMS
TALLO
TEMPERATURE RESISTANCE
TIGE
VARIEDADES
VARIETAL SUSCEPTIBILITY
VARIETE
VARIETIES
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Summary:The leaves and stems of 17 broadleaf evergreen taxa were screened for cold hardiness in laboratory tests. Leaves of Ilex were generally less cold hardy than stems. However, the leaves of I. × koehneana ‘Wirt L. Winn’, Ilex latifolia and Ilex ‘Lydia Morris’ were equal to or more cold hardy than the stems. Maximum cold hardiness of most taxa occurred in mid-January. Ilex opaca, Ilex opaca, ‘Greenleaf’, and Ilex × attenuata ‘Foster's #2,’ were the most cold hardy. Among the Ilex × attenuata cultivars, ‘Foster's #2’ was more cold tolerant than ‘Savannah’ and ‘East Palatka.’ Ilex latifolia and Ilex ‘Lydia Morris’ were least cold hardy. I. ‘Nellie Stevens’ and I. × koehneana ‘Wirt L. Winn’ were intermediate. Osmanthus heterophyllus ‘Gulftide’ was the hardiest tea-olive, followed by Osmanthus americanus, Osmanthus × fortunei and Osmanthus heterophyllus ‘Rotundifolius’. Prunus laurocerasus ‘Zabeliana’ was hardier than ‘Schipkaensis’ than ‘Otto Luyken’. The actual differences, however, were slight.
ISSN:0738-2898
2573-5586
DOI:10.24266/0738-2898-8.2.71