Camellia sinensis (leaf)
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''Introduction from Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Camellia_sinensis, retrieved 02/20/2012).'' | ''Introduction from Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Camellia_sinensis, retrieved 02/20/2012).'' | ||
− | ''Camellia sinensis'' is the species of plant whose leaves and leaf buds are used to produce Chinese tea. It is of the genus Camellia (Chinese: 茶花; pinyin: ''Cháhuā''), a genus of flowering plants in the family Theaceae. White tea, green tea, oolong, pu-erh tea and black tea are all harvested from this species, but are processed differently to attain different levels of oxidation. Kukicha (twig tea) is also harvested from Camellia sinensis, but uses twigs and stems rather than leaves. Common names include tea plant, tea tree, and tea shrub. | + | ''Camellia sinensis'' is the species of plant whose leaves and leaf buds are used to produce Chinese tea. It is of the genus ''Camellia'' (Chinese: 茶花; pinyin: ''Cháhuā''), a genus of flowering plants in the family Theaceae. White tea, green tea, oolong, pu-erh tea and black tea are all harvested from this species, but are processed differently to attain different levels of oxidation. Kukicha (twig tea) is also harvested from ''Camellia sinensis'', but uses twigs and stems rather than leaves. Common names include tea plant, tea tree, and tea shrub. |
There are two major varieties used for tea, Chinese tea, ''Camellia sinensis'' var. ''sinensis'', and Assam tea, ''Camellia sinensis'' var. ''assamica''. | There are two major varieties used for tea, Chinese tea, ''Camellia sinensis'' var. ''sinensis'', and Assam tea, ''Camellia sinensis'' var. ''assamica''. | ||
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| mainimage=Alkemists_Camellia_sinensis_(L.)_Kuntze_-Theaceae-_Macro.jpg | | mainimage=Alkemists_Camellia_sinensis_(L.)_Kuntze_-Theaceae-_Macro.jpg | ||
| companyimage=AP-LOGO-Laboratories Crop - Copy.jpg | | companyimage=AP-LOGO-Laboratories Crop - Copy.jpg | ||
− | | description=Green Tea Leaf (''Camellia sinensis'') | + | | description=Green Tea (Leaf) (''Camellia sinensis'') |
− | | characteristics=Macroscopic image of cut and sifted ''Camellia sinensis'' | + | | characteristics=Macroscopic image of cut and sifted ''Camellia sinensis''. |
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=Microscopic Entries= | =Microscopic Entries= | ||
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| mainimage=12 0206 Camellia sinensis plate from Greenish et al Anotomical Atlas.JPG | | mainimage=12 0206 Camellia sinensis plate from Greenish et al Anotomical Atlas.JPG | ||
| description=Tea (leaves) (''Camellia sinensis'') | | description=Tea (leaves) (''Camellia sinensis'') | ||
− | | characteristics=The upper epidermis is composed of cells with undulating walls and covered with a rather thick cuticle. The lower epidermis consists of smaller cells and is alone provided with stomata; the latter are surrounded by three or four tangentially | + | | characteristics=The upper epidermis is composed of cells with undulating walls and covered with a rather thick cuticle. The lower epidermis consists of smaller cells and is alone provided with stomata; the latter are surrounded by three or four tangentially elongated cells. |
Simple hairs occur on both surfaces of the leaf, but they are more abundant on the lower; the number, however, varies with the variety of tea, and with the age of the leaf; they are unicellular, tapering and rather thick walled, varying very much in length, but often attaining 500-700 microns. | Simple hairs occur on both surfaces of the leaf, but they are more abundant on the lower; the number, however, varies with the variety of tea, and with the age of the leaf; they are unicellular, tapering and rather thick walled, varying very much in length, but often attaining 500-700 microns. | ||
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| caption1=Irregular and branched astrosclereid from Camellia sinensis leaf viewed at 400x with Acidified chloral Hydrate Soln. | | caption1=Irregular and branched astrosclereid from Camellia sinensis leaf viewed at 400x with Acidified chloral Hydrate Soln. | ||
| companyimage=AP-LOGO-Laboratories Crop - Copy.jpg | | companyimage=AP-LOGO-Laboratories Crop - Copy.jpg | ||
− | | description=Green Tea Leaf ("Camellia sinensis") | + | | description=Green Tea (Leaf) ("Camellia sinensis") |
| image2=Alkemists_Camellia_sinensis_(L.)_Kuntze_-Theaceae-_thick_walled_unicellular_trichome.jpg | | image2=Alkemists_Camellia_sinensis_(L.)_Kuntze_-Theaceae-_thick_walled_unicellular_trichome.jpg | ||
− | | caption2=Thick walled unicellular trichome viewed at 400x under polarized light with Acidified | + | | caption2=Thick walled unicellular trichome viewed at 400x under polarized light with Acidified Chloral Hydrate. |
− | + | | reference=Herbal Drugs and Phytopharmaceuticals, Wichtl, M., 1994 | |
| }} | | }} | ||
=HPTLC Entries= | =HPTLC Entries= | ||
=Other Points of Interest= | =Other Points of Interest= |
Revision as of 21:19, 16 October 2012
Contents |
Introduction
Introduction from Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Camellia_sinensis, retrieved 02/20/2012).
Camellia sinensis is the species of plant whose leaves and leaf buds are used to produce Chinese tea. It is of the genus Camellia (Chinese: 茶花; pinyin: Cháhuā), a genus of flowering plants in the family Theaceae. White tea, green tea, oolong, pu-erh tea and black tea are all harvested from this species, but are processed differently to attain different levels of oxidation. Kukicha (twig tea) is also harvested from Camellia sinensis, but uses twigs and stems rather than leaves. Common names include tea plant, tea tree, and tea shrub.
There are two major varieties used for tea, Chinese tea, Camellia sinensis var. sinensis, and Assam tea, Camellia sinensis var. assamica.
The quoted text in this section was licensed for use under the Creative Commons ShareAlike License, version 3.0: http://creativecommons.org/licenses/by-sa/3.0/
Macroscopic Entries
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Microscopic Entries
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HPTLC Entries
Other Points of Interest
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