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. 2016 Feb 4;4:e1653. doi: 10.7717/peerj.1653

Figure 4. Longitudinal sections of flowers of Lacandonia brasiliana (LM).

Figure 4

(A, B) Longitudinal sections of unopened buds showing central stamens at a pre-meiotic stage, with anther wall layers already visible surrounding sporogenous cells. The carpels have not yet begun to differentiate ovules. Filamentous appendages have begun to grow from the tips of the tepals. (C) Longitudinal section of inflorescence with three unopened buds at different stages, the youngest flower primordium lacking organs. (D) Longitudinal section of later stage; individual pollen grains visible in anther locules; ovules at megaspore mother stage with developing integuments. Filamentous tepal appendages have extended down between the anthers. (E) Transverse section of an apical tepal appendage showing central vasculature. Labels: ca, carpel; fta, filamentous tepal appendage; st, stamen; yp, young flower primordium. Scale bars: in A−D = 100 μm, in E = 10 μm.