2. Perianth yellow, thin, 2 outer segments free, 2 inner ones basally ±
adnate to filament.
花被黄,瘦,免费的2外部裂片,2内部的基部±贴生于花丝。
3. Aggregate fruit
adnate to torus, separating from base of torus, rarely separating from torus at maturity, not or rarely hollow.
聚合果贴生于花托,分开花托的自基部,很少成熟时从花托分开,并非或很少空。