Anemone riparia - Weblio 英和・和英辞典 (original) (raw)

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anemone riparia

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Anemone riparia

出典:『Wikipedia』 (2011/04/20 03:14 UTC 版)

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Anemone riparia (Thimble weed) is an upright growing herbaceous plant species in the genus Anemone and family Ranunculaceae. Plants grow 30 to 100 cm tall, flowering early summer but often found flowering till mid August, the flowers are greenish-white, white or even sometimes red tinted, 2-3 cm wide. After flowering the fruits are produced in a dense rounded, to rounded columned heads 8 mm thick. When the fruits, called achenes, are ripe they have gray-white colored, densely woolly styles, that allow them to blow away in the wind. This species is similar to Anemone cylindrica and Anemone virginiana. Native from Eastern North America were it is found growing on rocky banks and in open woods. The species validity in the past has been disputed. Differing from A. virginiana in the size of the fruiting heads and anthers.

• A. virginiana with anthers 1.2-1.6 mm long, fruiting heads 12-15 mm thick.
• A. riparia with anthers .7-1.2 mm long and fruiting heads 7-11 mm thick.

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