Rhizome dimorphic: short and thick (nodulose), and long and thin; sepals 5--12.
根状茎二形：
厚(
小节)
；
片5--12.(16
；有小瘤Rhizome dimorphic: short and thick (nodulose), and long and thin; sepals 5--12.
根状茎二形：厚(小节)；片5--12.(16
Rhizome long and thin or shortly nodulose; leaf blade ternate, petiole narrow; involucral bracts petiolate; pistils and achenes with distinct style and small, usually linear stigma.
根状茎或小节；三出叶片，狭窄叶柄；总苞片叶柄；雌蕊瘦果明显花柱小，通常线形柱头。(8
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