Fig. 7

Synangiate pollen organs on fertile rachises of Cosmosperma polyloba. a Anisotomous fertile rachises with terminal pollen organs and prickles (black arrows). PKUB13516. Scale bar = 5 mm. b Two anisotomous fertile rachises with terminal pollen organs. Fertile rachises (arrow 1, enlarged in Fig. 7 c displaying sparse prickles; pollen organ (arrow 2, 3, enlarged in Fig. 7 d-f) born in pairs or singly. PKUB13517. Scale bar = 5 mm. c Enlargement of Fig. 7 (b, arrow 1), showing one fertile rachis bearing conical prickles (black arrows). Scale bar = 0.5 mm. d, e Enlargement of Fig. 7 (b, arrow 2). Two stages of dégagement showing pollen organs. Scale bar = 2 mm. f Enlargement of Fig. 7 (b, arrow 3). Pollen organs terminating bifurcated fertile rachises. Scale bar = 2 mm