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Morphological characteristics of the leaf (A) and flower (B) of A. tonkinensis. The photos were taken by the author Yong Gao. The spathe of A. tonkinensis is up to 20 cm long, with a shortly convolute base, strongly concave, erect, or arching over spadix apically. The appendix is oval-elliptic, obtuse, white, base with sterile stamens, gradually disappearing upwards. The spadix is sessile, shorter than or nearly as long as spathe.
