58 МЕ, К, Н. COMPTON : AN INVESTIGATION OF THE 
The four phloem bundles of the root pass up the hypocotyl unaltered, 
except histologically; fibres are present in the root, but die out higher up. 
The four root xylems broaden out below the collet into tangential bands, each 
with a median protoxylem ; each of these quickly breaks into two halves, 
differentiated tangentially, with marginal protoxylem, so that eight xylem 
bands are produced at the base of the hypocotyl. This continues through 
about three-quarters of the hypocotyl, the xylems becoming more and more 
endareh ; the groups then come into contact with one another in pairs 
beneath the phloems, so that four eollateral bundles are produced in the 
upper quarter of the hypocotyl ; each bundle, however, showing signs of its 
double origin. Each cotyledon receives two of theso collateral bundles. 
The plumular bundles are attached to the edges of the cotyledonary bundles 
towards the minor axis ; two such appear on each side about three-quarters 
up the hypocotyl, and a little higher a median bundle also appears on each 
side of the minor axis. 
The whole structure recalls what is found in the Phaseoleze, with which 
tribe this species shows some analogy. Further points оѓ similarity are: 
(1) the presence in some hypocotyls of interealary bundles (“ Zwischen- 
stránge " of Dodel); (2) the presence of a considerable quantity of tannin in 
special sacs; (3) the opposite position of the first two leaves; and (4) the 
early development of the plumule. 
Pisum Jomardi shows a very similar structure to that of P. sativum ; the 
first epicotyledonary internode, however, has only a single group of fibres 
on each side of the central elliptical cylinder, instead of the two in 
P. sativum. 
Vicia amphicarpea, Lrvum Lens*, Lathyrus angustifolius, Orobus cyaneus, 
and 0. niger all show a close resemblance to Vicia sativa t. (Goldsmith, 
1876 p. 1). Soalso does Lathyrus Nissolia $, except for its very small size 
and the consequent restricted number of its vascular elements. 
Lathyrus sativus is closely similar to Pisum sativum, allowing for its smaller 
size; the cotyledon traces, however, on their way out through the cortex, 
give off several small bundles. Many of these disappear almost immediately 
(cf. Van Tieghem, 1884, p. 134) ; but in several instances опе, in a single 
specimen two bundles from each cotyledon trace pass up the first epicotyle- 
donary internode as cortical fibrovaseular bundles. 
PHASEOLELE. 
KENNEDYA RUBICUNDA, Vent. 
The hypocotyl is curiously thickened at the base, and narrows rapidly 
upwards: it tapers rather suddenly to a branched primary root. The 
cotyledons are oblong, pinnately nerved. First two leaves opposite, as is 
general throughout the Phaseoleæ. 
* PI L fig. 6. + PL L fig 8. { PL L fig. 13. 
