trace of the bract (Br) is also given off by one of the three 
vascular bundles that deviates from the inflorescence 
axis. In Bulbophyllum, Pholidota, some other species of 
Dendrobium and a few others (Fig. 2D), three vascular 
bundles from the inflorescence axis constitute the main 
traces of the ovary. One of the three breaks up into the 
median trace of the bract (Br) and the main trace of the 
ovary underlying the dorsal sepal (DS). The second, on 
bifurcation, forms the respective main traces underlying 
the lateral petal (LP) and lateral sepal (LS) of one side, 
whereas the third bundle gives rise to the remaining 
three main traces lying under the lateral petal (LP), the 
lateral sepal (LS) of the other side, and also to the me- 
dian petal (MP). In Cymbidium, Eulophia, Spathoglottis 
and some members of the tribe Sarcanthinae (Fig. 2 E), 
though three vascular bundles from the inflorescence axis 
deviate into the floral axis, one of them constitutes only 
the midrib trace of the bract (Br). The second one gives 
rise to the main trace underlying the dorsal sepal (DS), 
one lateral sepal (LS) and median petal (MP). The third 
breaks up into the main traces underlying the lateral 
petals (LP) of both sides and the remaining lateral sepal. 
Thus in this instance only two bundles actually take part 
in the construction of the six main traces of the ovary. 
The situation described above may be represented in 
the following tabular form (the vascular supply of the 
bract is omitted): 
Tribe Number of bundles deviating Method of further breaking 
or JSrom the inflorescence axis up of the bundles of the 
genera into the floral axis inflorescence axis 
Cy pripedilinae 6 No further differentiation ; 
(Fig. 2A) but directly constitute the 
six main traces of the 
ovary,—DS, LS, LS, LP, 
ie. Mer: 
[ 67 ] 
