EXPLANATION OF PLATES 



Abbreviations. A &i B, primary segments of embryo ; adr, adven- 

 titious root ; ant, antipodal cells ; as, axillary scale ; ax, axillary 

 member; axb, axial bundle; axbr, axillary branch; C, third segment 

 of embryo ; c, cortex; cal, calyptrogen ; cb, cortical bundle; cc, com- 

 panion cell ; col, coleorrhiza ; con, connective ; cot, cotyledon ; d, der- 

 matogen ; di, diaphragm ; e, &gg ; ems, embryo-sac ; end, endodermis ; 

 ep, epidermis; epc. epicotyl; //, flower; ys/, floral scale leaf; gen 

 generative cell; GP ox gp, growing point; hyp, hypocotyl; /, inter- 

 cellular space ; ic, inner cortex; la, lacuna; L or /, leaf; lb, lateral 

 bundle; low. sfl, lower subfloral leaf ; Ipn, lower polar nucleus ; ma, 

 male cells; mc, middle cortex ; oc, outer cortex ; pa, parietal layer or 

 layers; pb, periblem; ped, peduncle; pist, pistil; pi, plerome ; pm, 

 pollen mother-cells; pr, primary root cells; r, root; rh, root hairs; 

 rha, rhachis ; rs, root stock ; s, sieve tube ; se, secretion cells ; sfl, 

 subfloral leaf; sg, starch-grains; 5^, sheath ; spo, sporogenous cells ; 

 spt, septum ; 5^, stem or stem apex ; sta, stamen ; stc, stylar canal ; 

 5/^, stigma ; sti, stipe ; sus, suspensor ; syn, synergidae, ta, tapetum ; 

 th, theca ; tn, tube nucleus ; tra, tracheae ; tri, trichoblasts ; u, un- 

 dulations; upn, upper polar nucleus; up. sfl, upper subfloral leaf; 

 ust, upright stem; vsl, vegetative scale leaf 



