Fig. 4From: Spirematospermum wetzleri (Heer) Chandler (Zingiberaceae) from the Miocene of Weichang, Hebei Province, North China and the phytogeographic history of the genusSketch drawings illustrating the morphology and anatomy of Spirematospermum wetzleri (Koch and Friedrich 1971). a The plant reconstruction; b Anatomical structures of a capsule; c Anatomical structures of a seedBack to article page