It may be recalled that in some species the traces for 
the lateral stamens of the outer whorl (A2 and A3) may 
also be represented and that in many instances all of the 
four lateral stamens may be represented by their corres- 
ponding vascular traces in varying degrees of expression: 
that is, the traces themselves may be so rudimentary that 
they do not run even to the base of the gynostemium, or 
they run up only a short distance into the structure, or 
they may even reach the distal end of it. The degree of 
expression may affect one, two, three or all of the four 
lateral staminal traces. The latter condition may be fre- 
quently seen in Zeuaxine, Oberonia, Eria, ete. 
Clear-cut examples where either the lateral stamens of 
the inner whorl alone or only those of the outer whorl 
manifest themselves are seen in Mulophia. In EH. nuda 
(Fig. 7 A and B) the main traces (LS) underlying the 
lateral perianth members of the outer whorl, after giving 
off the traces G2 and G3 to the respective stigmas, sep- 
arate out correspondingly the traces A2 and A8’. That 
AiG A> G3 
Fig. 7. Drawings of vascular skeletons made from wire-plasticine 
models illustrating the splitting up of the six main vascular traces 
of the ovary into the vascular supply of various whorls. A and B. 
Eulophia nuda; C and D. Eulophia epidendraea. In Band D the 
staminal and stigmatic traces are shown as rearranged according to 
their status; vascular traces of the perianth members are omitted 
in these. 
[ 78 ] 
