Fig. 3From: “Phoenix in Flight”: an unique fruit morphology ensures wind dispersal of seeds of the phoenix tree (Firmiana simplex (L.) W. Wight)Terminal descent velocity versus number of seeds (a) and wing loading (b) in Firmiana simplex. Solid points and hollow points represent two groups of fruit spinning with their dorsal and ventral sides downward, respectively, and the solid lines and dotted lines are the linear fitting curves of these two groups of data, respectivelyBack to article page