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Scarlet pimpernel (''Anagallis arvensis''; also known as red pimpernel, red chickweed, poorman's barometer, poor man's weather-glass,〔(【引用サイトリンク】title=Scarlet Pimpernel (Anagallis arvensis) )〕 shepherd's weather glass or shepherd's clock) is a low-growing annual plant. The native range of the species is Europe and Western Asia and North Africa.〔(【引用サイトリンク】title=Factsheet - Anagallis arvensis )〕 The species has been distributed widely by humans, either deliberately as an ornamental flower or accidentally.〔(【引用サイトリンク】title=Angallis arvensis (Scarlet pimpernel) )〕 ''A. arvensis'' is now naturalised almost worldwide, with a range that encompasses the Americas, Central and East Asia, the Indian Subcontinent, Malesia, the Pacific Islands, Australasia and Southern Africa.〔(【引用サイトリンク】title=Descriptions and articles about the Scarlet Pimpernel (Anagallis arvensis) - Encyclopedia of Life )〕〔(【引用サイトリンク】title=Anagallis arvensis in Flora of North America @ efloras.org )〕〔http://keys.lucidcentral.org/keys/v3/UQCentenary/key/UQ_Centenary/Media/Html/anagallisarvensis.htm〕 Traditionally included in the family Primulaceae, the genus ''Anagallis'' was placed in the family Myrsinaceae〔 ((full pdf.text ))〕 until that family was included in Primulaceae in the APG III system. This common European plant is generally considered a weed and is an indicator of light soils. The origin of the ''pimpernel'' name comes from ''pympernele'' (); late Middle English, derived from Middle French pimprenelle, Old French piprenelle; Vulgar Latin *piperīnella= Latin piper pepper + -īn- -ine + -ella diminutive suffix. It is most well known for being the emblem of the fictional hero the Scarlet Pimpernel. ==Description== Scarlet pimpernel has weak sprawling stems growing to about long, which bear bright green ovate sessile leaves in opposite pairs. The small orange, red or blue flowers are produced in the leaf axils from spring to autumn. The petal margins are somewhat crenate and have small glandular hairs. Blue-flowered plants (''A. arvensis'' Forma ''azurea'') are common in some areas, such as the Mediterranean region, and should not be confused with the related Blue pimpernel, ''Anagallis foemina'', sometimes ssp. ''foemina''. In 2007, a molecular phylogenetic study showed that ''Anagallis foemina'' is more closely related to ''Anagallis monelli'' than to ''Anagallis arvensis'', and should be treated as a separate species. Scarlet pimpernel flowers are open only when the sun shines.〔 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「Anagallis arvensis」の詳細全文を読む スポンサード リンク
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