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- Q2358003 subject Q4056905.
- Q2358003 subject Q7157153.
- Q2358003 abstract "Marcescence is the retention of dead plant organs that normally are shed. It is most obvious in deciduous trees that retain leaves through the winter. Several trees normally have marcescent leaves such as oak (Quercus), beech (Fagus) and hornbeam (Carpinus), or marcescent stipules as in some but not all species of willows (Salix). Marcescent leaves of pin oak (Quercus palustris) complete development of their abscission layer in the spring. The base of the petiole remains alive over the winter. Many other trees may have marcescent leaves in seasons where an early freeze kills the leaves before the abscission layer develops or completes development. Diseases or pests can also kill leaves before they can develop an abscission layer.Marcescent leaves may be retained indefinitely and do not break off until mechanical forces (wind for instance) cause the dry and brittle petioles to snap.Many palms form a skirt-like or shuttlecock-like crown of marcescent leaves under new growth that may persist for years before being shed. In some species only juveniles retain dead leaves and marcescence in palms is considered a primitive trait.The term marcescent is also used in mycology to describe a mushroom which (unlike most species, described as "putrescent") can dry out, but later revive and continue to disperse spores. Genus Marasmius is well known for this feature, which was considered taxonomically important by Elias Magnus Fries in his 1838 classification of the fungi.".
- Q2358003 thumbnail Oakmer.JPG?width=300.
- Q2358003 wikiPageExternalLink watch?v=OStyodSVmrc.
- Q2358003 wikiPageWikiLink Q10289985.
- Q2358003 wikiPageWikiLink Q1131316.
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- Q2358003 wikiPageWikiLink Q2355817.
- Q2358003 wikiPageWikiLink Q25403.
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- Q2358003 wikiPageWikiLink Q290488.
- Q2358003 wikiPageWikiLink Q304216.
- Q2358003 wikiPageWikiLink Q333666.
- Q2358003 wikiPageWikiLink Q35517.
- Q2358003 wikiPageWikiLink Q36050.
- Q2358003 wikiPageWikiLink Q4056905.
- Q2358003 wikiPageWikiLink Q5456.
- Q2358003 wikiPageWikiLink Q59099.
- Q2358003 wikiPageWikiLink Q59798.
- Q2358003 wikiPageWikiLink Q712378.
- Q2358003 wikiPageWikiLink Q7157153.
- Q2358003 wikiPageWikiLink Q7175.
- Q2358003 wikiPageWikiLink Q736879.
- Q2358003 wikiPageWikiLink Q738961.
- Q2358003 wikiPageWikiLink Q874669.
- Q2358003 comment "Marcescence is the retention of dead plant organs that normally are shed. It is most obvious in deciduous trees that retain leaves through the winter. Several trees normally have marcescent leaves such as oak (Quercus), beech (Fagus) and hornbeam (Carpinus), or marcescent stipules as in some but not all species of willows (Salix). Marcescent leaves of pin oak (Quercus palustris) complete development of their abscission layer in the spring. The base of the petiole remains alive over the winter.".
- Q2358003 label "Marcescence".
- Q2358003 depiction Oakmer.JPG.