OF SOME SAPOTACEOUS SEEDLINGS. 193 
stele. The two pairs of primary bundles or vascular groups bend out in opposite 
directions going to the cotyledons. The accessory bundle of one side widens, forks, 
and then bends outwards laterally to join the spiral elements of the first internode 
(fig. 15). Ata little higher level the lateral bundle of the other side also widens and 
forks and then bends laterally inwards in the same direction as those of the other side 
and joins the young elements of the first internode, which is here seen in longitudinal 
section (fig. 16). This forking of epicotyledonary traces is described by Mr. H. Wright * 
for Diospyros, also, at the node. 
In one specimen of Bumelia tenax (not free from suspicion of abnormality) I have, 
however, counted as many as nine protoxylem points near the root-apex. Of these, one 
dies out about 0°8 mm. above the apex, four fuse in pairs a very little higher, leaving 
the usual six to continue on up the root (fig. 11 b). Of these six, four are primary 
Fig. 1. Fig. 2. Fig. 3. Fig. 4. 
LOR 5 D oe CD (8) > d 
of root, and below node. 
Anomalous type of Bumelia tena. 
bundles, one (IV) (text-figs. 1-4) is situated in the plane perpendicular to that of the 
cotyledons, the other (VI) is not opposite to it but in the cotyledonary plane. The 
former of these two « accessory " bundles (IV) loses its protoxylem altogether a little above 
the plane at which the other groups cease to be root-like, 7. e. about 4 mm. above the root- 
T where the whole axis below the node measuresabout lem. The bundle is difficult 
to identify at the node, but a little higher its place becomes the region of attachment of 
me of the foliar traces of the stem. The other accessory bundle (VI) seemed to be 
destined, with the primary group on each side of it, for the cotyledon; but its protoxylem 
I$ out at the node, part of the metaxylem enters the cotyledon and dies out there, the 
ret forms the point of attachment for the vascular tissue of a dormant bud, situated in 
"ie axil of the cotyledon. From the seedlings examined it appears that spiral elements 
nine in the bud and are connected or not with the stele according to the state of 
maturity reached by the bud at the time of fixing. 
"ug E. side of the stele where there is no root-strand, groups ‘of xylem (not spiral) 
that E node and form a point of attachment for the young elements of the stem on 
* Loc. cit. p. 64 (cf. post, p. 199). 
ni n 
(8 mm, above apex Root. 4 mm. above apex of root, Petiole and stem. 
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