轮伞花序是由许多无柄的花聚伞状排列在茎节的叶腋内，呈轮状排列，如益母草等。严格说来，轮伞花序不是一种独立的花序类型，而只是聚伞花序的一种特殊排列着生形式。
任何属于萝芙木属的灌木或小树，有轮生体的叶子和聚伞花序的花；产生的物质用在医药上，特别是催吐剂和泻剂。
Any shrub or small tree of the genus rauwolfia having leaves in whorls and cymose flowers; yield substances used medicinally especially as emetics or purgatives.
任何属于萝芙木属的灌木或小树，有轮生体的叶子和聚伞花序的花；产生的物质用在医药，特别是催。
Any shrub or small tree of the genus Rauwolfia having leaves in whorls and cymose flowers; yield substances used medicinally especially as emetics or purgatives.
结果表明：香梨为完全花，伞房花序，花冠轮生辐射对称，雄蕊16～ 30枚，柱头多为5枚，极少数为6枚。
The results were as follow:complete flower, corymb inflorescens, imferior ovary, rotate corolla, androecium with 16~30 stamens, compound pistil with 5~6 stigmas;
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