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dewberry : ウィキペディア英語版
dewberry

The dewberries are a group of species in the genus ''Rubus'', section ''Rubus'', closely related to the blackberries. They are small trailing (rather than upright or high-arching) brambles with aggregate fruits, reminiscent of the raspberry, but are usually purple to black instead of red. Unlike many other ''Rubus'' species, dewberries have separate male and female plants (they are dioecious).〔Burbank, Luther (1914). ''Luther Burbank: His Methods and Discoveries, Their Practical Application.'' Vol. 3. Luther Burbank Press.〕
Dewberries are common throughout most of the Northern Hemisphere, sometimes thought of as a nuisance weed, but the leaves can be used for a tea, and the berries are sweet and edible. They can be eaten raw, or used to make cobbler, jam, or pie.
Around March and April, the plants start to grow white flowers that develop into small green berries. The tiny green berries grow red and then a deep purple-blue as they ripen. When the berries are ripe, they are tender and difficult to pick in any quantity without squashing them. The plants do not have upright canes like some other ''Rubus'' species, but have stems that trail along the ground, putting forth new roots along the length of the stem. The stems are covered with fine spines or stickers. The berries are sweet and, for many, less seedy than blackberries and worth the scratches and stains that come from picking them.
In the winter the leaves often remain on the stems, but may turn dark red. The leaves are sometimes eaten by the larvae of some Lepidoptera species including peach blossom moths.
The European dewberry, ''Rubus caesius'', grows more upright like other brambles, but is frequently restricted to coastal communities, especially sand dune systems. Its fruits are a deep, almost black, purple and are coated with a thin layer or 'dew' of waxy droplets. Thus, they appear sky-blue (''caesius'' is Latin for pale blue). It is less sought after, because its fruits are small and retain a markedly tart taste even when fully ripe.
==Species==

* ''Rubus'' Section ''Caesii'', European dewberry
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* European dewberry, ''Rubus caesius'' L.
* ''Rubus'' Section ''Flagellares'', American dewberries
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* ''Rubus aboriginum'' Rydb., synonyms:〔(UDSA PLANTS )〕
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* ''Rubus almus'' (L.H. Bailey) L.H.Bailey
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* ''Rubus austrinus'' L.H.Bailey
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* ''Rubus bollianus'' L.H.Bailey
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* ''Rubus clair-brownii L.H.Bailey
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* ''Rubus decor'' L.H. Bailey
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* ''Rubus flagellaris'' Willd. var. ''almus'' L.H.Bailey
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* ''Rubus foliaceus'' L.H. Bailey
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* ''Rubus ignarus'' L.H. Bailey
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* ''Rubus ricei'' L.H. Bailey
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* Aberdeen dewberry, ''Rubus depavitus'' L.H.Bailey
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* Northern dewberry, ''Rubus flagellaris'' Willd.
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* Swamp dewberry, ''Rubus hispidus'' L.
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* Upland dewberry, ''Rubus invisus'' (L.H.Bailey) Britton
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* Pacific blackberry, ''Rubus ursinus'' Cham. & Schltdl.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「dewberry」の詳細全文を読む



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