Fig. 3From: Spirematospermum wetzleri (Heer) Chandler (Zingiberaceae) from the Miocene of Weichang, Hebei Province, North China and the phytogeographic history of the genusCapsules and seeds of Spirematospermum wetzleri from the early Miocene of Weichang, Hebei Province, North China. a Five flattened capsules with the apex eroded away, specimen nos. PEPB70701–70705; b Five polyhedral capsules, tapering into a curved stalk at the base, specimen nos. PEPB70706–70710; c−g The distinctive, spirally striate and arillate seeds, specimen nos. PEPB70731–70735; h SEM image of the transverse section of the seed; i Magnification of the white rectangular part in hBack to article page