Fig. 6
From: Seed development in Paeonia ostii (Paeoniaceae), with particular reference to embryogeny
Longitudinal sections of developing seeds of Paeonia ostii. (a) 0 DAP (ovule), (b) 3 DAP, (c) 7 DAP, (d) 9 DAP, (e) 13 DAP, (f) 15 DAP, (g) 20 DAP, (h) 25 DAP. CPe, cellularized proembryo; Egg, egg cell; Es, embryo sac; Fn, free nuclear endosperm; FnE, free nuclear proembryo; Ii, inner integument; Nu, nucellus; Oi, outer integument; Pn, polar nucleus; S, synergid cell; Sn, sperm nucleus