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Japanese maple autumn leaves. Autumn leaf color is a phenomenon that affects the normally green leaves of many deciduous trees and shrubs by which they take on, during a few weeks in the autumn season, various shades of yellow, orange, red, purple, and brown. [1]
By confining fresh litter in the mesh bags and placing them on the ground, an ecologist can monitor and collect the decay measurements of that litter. [7] An exponential decay pattern has been produced by this type of experiment: X X o = e − k {\displaystyle {\frac {X}{X_{o}}}=e^{-k}} , where X o {\displaystyle X_{o}} is the initial leaf ...
A leaf (pl.: leaves) is a principal appendage of the stem of a vascular plant, [1] usually borne laterally above ground and specialized for photosynthesis.Leaves are collectively called foliage, as in "autumn foliage", [2] [3] while the leaves, stem, flower, and fruit collectively form the shoot system. [4]
In systematic virus infections leaf spots caused by viruses show a loss of green colour in leaves, due to chlorosis which is a repression of chlorophyll development. [1] Leaves may yellow and have a mottled green or yellow appearance, show mosaic (e.g. chlorotic spotting) and ringspots (chlorotic or necrotic rings). [7]
In 1950, Johnny Mercer wrote the English lyric and gave it the title "Autumn Leaves". The English lyrics are significantly shorter than the French version, consisting of only two verses. In the French original, the crucial line "C'est une chanson" starts at the 13th bar, while in English the line "the autumn leaves" starts at bar 1. [3]
Khat (Catha edulis), also known as Bushman's tea, especially in South Africa, is a flowering plant native to eastern and southeastern Africa. [2] It has a history of cultivation originating in the Harar area (present day eastern Ethiopia) and subsequently introduced at different times to countries nearby in East Africa and Southern Arabia, most notably Yemen. [3]
Their leaves arise more or less directly from ground level, where their flowers also appear. The number of species known has increased considerably from the 1980s onwards, with around 100 accepted as of July 2013. Aspidistra elatior is common worldwide as a foliage house plant that is very tolerant of neglect. It and other species can also be ...
Press used for preparing palm leaves for writing. The palm leaves are first cooked and dried. The writer then uses a stylus to inscribe letters. Natural colourings are applied to the surface so the ink will stick to the grooves. This process is similar to intaglio printing. Afterwards, a clean cloth is used to wipe out the excess ink and the ...