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Veronica arvensis : ウィキペディア英語版 | Veronica arvensis
''Veronica arvensis'' (common names: wall speedwell, corn speedwell, common speedwell, rock speedwell, 〔(''Veronica arvensis'' ) at (USDA PLANTS Database )〕) is an annual flowering plant in the plantain family Plantaginaceae. The species is a native European plant and a common weed in gardens, pastures, waste places and cultivated land.〔 ==Description== It is a hairy, erect to almost recumbent, annual herb, 9 to 40 cm high from a taproot. The leaves are oppositely arranged in pairs about the stem. The lower leaves have short petioles; the upper are sessile. Each leaf, 1.5 to 2.5 centimeters in length, is ovate, or triangular with a truncated or slightly cordate base, with coarse teeth. Borne in a raceme, initially compact but elongating with age, the flowers are pale blue to blue-violet, 2 to 3 mm in diameter, four-lobed with a narrow lowest lobe. Flower stalks are 0.5 to 2 mm and shorter than the bracts. The fruit capsules are heart-shaped and shorter than the sepal-teeth. It flowers from April to October.〔
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「Veronica arvensis」の詳細全文を読む
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