Ranales , Rhoeadales , Rosales . 
709 
throughout the petiole. Lateral strands are given off as these enter the free 
laminae. Apart from this special feature P. Emodi would seem to resemble 
Eranthis hiemalis , judging from Miss Sargant’s 1 description and figures of 
that species. 
Lardizabalaceae. 
Decaisnea Fargesii . The hypocotyl of this species is long and stem- 
like. It shows the usual four groups of phloem with 
metaxylem within, and somewhat crushed protoxylem 
outlining the inner border. At the cotyledonary 
node four small strands are detached which pass in- 
dependently into the base of the cotyledons. The 
main portion of the four diagonal bundles of the 
hypocotyl is continued upwards as the very widely 
divergent halves of the double bundle, only identi- 
fiable as such by the sporadic appearance of isolated 
central protoxylem elements. (Cf. Calycanthaceae 
below.) The four apparently collateral strands of 
the lower part of the hypocotyl gradually pass into 
the tissues of a diarch root by approximation of the 
phloems in the intercotyledonary and of the xylems 
in the cotyledonary planes, respectively. _ „ 
. . r r J caisnea Fargesn. § nat. 
The behaviour of the lateral strands is somewhat size, 
similar to that of the corresponding bundles of Lirio - 
dendron tulipifera (PI. L, Fig. 6), while the central double bundle is very 
like that of Calyca 7 ithus (Text-fig. 22). 
Magnoliaceae. 
Magnolia tripetala (see PI. L, Figs. 9-12). The hypocotyl shows as its 
most characteristic arrangement eight groups of phloem with metaxylem 
within each, and four groups of protoxylem situated in the cotyledonary 
and intercotyledonary planes, so that phloem and metaxylem are found in 
twin pairs in the diagonal planes. The aggregation first of the phloem 
pairs to form four masses in the diagonal planes, and then of the metaxylem 
so as to form a quadrangular mass of wood which is nearly solid (see PI. L, 
P"igs. 10-12), gradually changes the hypocotyledonary arrangement to 
that of a root as we follow it downwards. In passing upwards from the 
structure described for the hypocotyl, the phloem and xylem groups 
nearest to the intercotyledonary plane are seen to fuse a short distance 
below the node, so that a single collateral strand is formed in this plane, 
thus sharply distinguishing it from the double bundles in the cotyledonary 
plane which are continued as such into the petioles of the cotyledons. The 
collateral intercotyledonary strands bifurcate at the node just after leaving 
1 Loc. cit. 
3 B 2 
19 
