| 翻訳と辞書 |
| Drosera anglica ： ウィキペディア英語版 |
Drosera anglica
''Drosera anglica'', commonly known as the English sundew or great sundew, is a carnivorous plant species belonging to the sundew genus. It is a temperate species with a generally circumboreal range, although it does occur as far south as Japan, southern Europe, and the island of Kauai in Hawaii, where it grows as a subtropical sundew. It is thought to originate from an amphidiploid hybrid of ''D. rotundifolia'' and ''D. linearis'', meaning that a sterile hybrid between these two species doubled its chromosomes to produce fertile progeny which stabilized into the current ''D. anglica''.
==Morphology==
''Drosera anglica'' is a perennial herb which forms an upright, stemless rosette of generally leaves. As is typical for sundews, the laminae are densely covered with stalked mucilaginous glands, each tipped with a clear droplet of a viscous fluid used for trapping insects. The lamina, which is long, is held semi-erect by a long petiole, bringing the total leaf size to 30–95 mm. Plants are green, coloring red in bright light. In all populations except those in Kaua'i, ''D. anglica'' forms winter resting buds called hibernacula. These consist of a knot of tightly curled leaves at ground level, which unfurl in spring at the end of the dormancy period. The root system is weak and penetrates only a few centimeters, serving mainly as an anchor and for water absorption. Nitrogen is in short supply in bogs and trapping and digesting insects provides an alternate source.
''D. anglica'' flowers in the summer, sending up peduncles . long bearing several white flowers which open individually. Like other sundews, the flowers have five sepals, petals, and stamens. The petals for this species are 8–12 mm long, and the flowers have branched 2-lobed styles.〔 The odorless, nectar-less flowers do not rely on insect pollinators for pollination, rather setting seed well through self-pollination (autogamy). The black ovoid seed forms in a dehiscent capsule and is 1 to 1½ mm long.
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「Drosera anglica」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|