Abstract
Zingiber hainanense (Zingiberaceae), a new species from Hainan, China, is described and illustrated. It is compared to two most similar members from Z. sect. Cryptanthium, Z. guangxiense from Guangxi, China and Z. kawagoii, an endemic species from Taiwan, China. Zingiber hainanense differs from Z. guangxiense mainly by labellum and staminodes being purple red (vs. yellowish white throughout in Z. guangxiense), and differs from Z. kawagoii by labellum and lateral staminodes being linear or narrowly ovate (vs. obovate-oblong in Z. kawagoii). The pollen morphology and chromosome number count as well as a color plate of the new species are also presented in this study.
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