Tacca ampliplacenta L. Zhang &. Q.-J. Li sp. nova (Taccaceae) is described and illustrated from Yunnan province, China. It is distinguished by the following characters: the petioles, peduncles, and flowers are red wine coloured instead of dark purple; the bracts are very similar to T. chantrieri, but the fruits have different intumescent placentas, which fill the fruit cavity; and the stalk of the infructescence is rich in flexible fibre and very tough. Its flowering period (July–August) is rather late as compared with that of the sympatric T. chantrieri (April–June). This phenological difference may play an important role in reproductive isolation between the two species.
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Vol. 45 • No. 4