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''Astroloba spiralis'' is a small succulent plant of the Astroloba genus, endemic to the southern Karoo regions of the Western and Eastern Cape Provinces, South Africa.〔U. Eggli: ''Illustrated Handbook of Succulent Plants: Monocotyledons''. Springer Science & Business Media, 2001. p.187.〕 ==Description== ''Astroloba spiralis'' is a compact ''Astroloba'' species, with upright, erect stems that are densely covered in pointed succulent leaves. Stems are roughly 15cm in diameter, and reach a height of 200mm. The leaves are blue-green to grey in colour, they grow in 5 rows that sometimes form a gentle spiral. The leaves also have smooth surfaces (unlike the tubercled leaves of ''Astroloba bullulata'' and ''Astroloba corrugata''). Each leaf typically has an oblique keel near the point. The flowers appear in autumn (December to May). This species is easily confused with its close relative, the rare ''Astroloba herrei''. However ''Astroloba spiralis'' has more erect leaves (unlike the more spreading leaves of ''A.herrei'') and its perianth is wrinked, not smooth. A variety of this plant is sometimes recognised as a separate species, ''Astroloba pentagona'', that bears its leaves at a 45 degree angle from the stem, in 5 rows, and has tiny tubercles on the leave margins and keels (of which each leaf may have several).〔D.Court: ''Succulent Flora of Southern Africa''. CRC: 2000. p.267.〕 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「Astroloba spiralis」の詳細全文を読む スポンサード リンク
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