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''Senecio ampullaceus'' also known as Texas ragwort,〔 Texas squaw-weed, Texas groundsel,〔 〕 and Texas butterweed is a species of ''Senecio'' in the family Asteraceae and gets its Latin name ''ampullaceus'' from its flask shaped flower-head and is a recommended native for landscape use in Texas where it came from. ==Description== The seedlings of ''S. ampullaceus'' often have a purplish color on the undersides of their leaves in the winter, especially along their midrib.〔 Flowering in early–mid spring, Texas ragwort is a tall annual, growing to from to tall and similar to ''S. quaylei''.〔 Stems and leaves: The leaves with broadly winged leaf stalks, grow from single stems; the nodes between leaves getting shorter and shorter higher on the stem. Ovate leaves with pointed tips to long by to wide with tapered bases. Leaves at the lower portion of the plant have more teeth on their edges than the leaves at the upper portion of the mature plant.〔 Stems and leaves are covered loosely and unevenly with a mat of fine hairs, occasionally having no hairs.〔 Flowers: Flowering stalks have 10 to 30 flower heads which as a group make a flat top to the whole plant. Each flower head is surrounded by 2 to 8 bractlets or mini-leaves, each to more than . Approximately 13 green to grayish bracts, to long surrounding 8 ray florets and an to corolla.〔 Fruits: One seeded fruits with rigid pappus.〔 Roots: Roots relatively thin and branching.〔 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「Senecio ampullaceus」の詳細全文を読む スポンサード リンク
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