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单词 marcescent
释义

marcescent

/mɑːˈsɛs(ə)nt /
adjective Botany
(Of a leaf or frond) withering but remaining attached to the stem.After tertiary capitula ripened, cauline leaves senesced and remained marcescent on the stems....
  • Several trees normally have marcescent leaves such as oak (Quercus), beech (Fagus) and hornbeam (Carpinus).
  • There seems to be no evidence that marcescent leaves provide additional cold protection.

Derivatives

marcescence

noun ...
  • Legend notwithstanding, the ecological causes and consequences of marcescence are not well understood.
  • Marcescence is considered a juvenile characteristic because it is more common on younger trees and on the lower, more juvenile, parts of older trees.

Origin

Early 18th century: from Latin marcescent- 'beginning to wither', from marcere 'wither'.

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更新时间:2024/9/23 21:24:33