36 MH. R. H. COMPTON : AN INVESTIGATION OF THE 
The root contains a diarch 1-2-seriate plate of primary xylem; the 
phloem includes small scattered groups of large fibres, which die out on 
entering the hypocotyl. As we ascend the hypocotyl, the xylem plate 
increases somewhat in thickness at the centre and the protoxylems become: 
crushed, but a pith does not appear till about 4 mm. below the cotyledons. 
On the appearance of the pith the xylem begins to round up into two polar 
double bundles, and the phloem divides to accompany each group of xylem. 
At the node, however, the xylem is still exarch and roughly V-shaped, and 
the phloems lie laterally to it. Soon after entering the cotyledon, the 
transitional changes are completed by the gradual change in relative 
position of the root protoxylem and the metaxylem elements, and by 
the passage of the phloem into a dorsal position. 
ANTHYLLIS VULNERARIA, Linn. (РІ. 1. fig. 12.) 
A perennial herb, with short woody root-stock and mainly radical leaves. 
Hypocotyl passes smoothly into the root. Cotyledons narrowly oblong, 
connate into a short tube at the base. Lubbock (1892, p. 418) and 
De Candolle (1825, pl. 5) give figures of the seedling. 
The root is diarch, containing a narrow 1—3-seriate band of xylem lying in 
the cotyledonary plane. The phloem is destitute of fibres. "This condition 
continues for about five-sixths of the way up the hypocotyl, where the 
transition commences; the details closely resemble those in A. Barba- 
Jovis. 
ANTHYLLIS VULNERARIA var. DrrLENI, Schult. 
The seedling agrees closely with the type in form, size, and anatomy, and 
there is no need to describe it further. 
ANTHYLLIS TETRAPHYLLA, Linn. (Pl. 6. fig. 86.) 
Hypocotyl tapering slowly to the root. Cotyledons ovate, slightly asym- 
metrical, stalked with prominent midrib, pinninerved. 
The root, unlike that of the other species of Anthyllis, is tetrarch, con- 
taining a solid four-rayed xylem star and four phloems, each with a central 
mass of fibres. A pith slowly appears about half-way up the hypocotyl, and 
gradually separates the xylem into four groups, of which the two polar remain 
wedge-shaped, the two lateral broadening into a V-shape (fig. 86, at three- 
quarters up hypocotyl). A little higher up six groups can be distinguished, 
comprising a polar bundle and two half-lateral bundles at each end of the ellip- 
tical stele. The polar xylems undergo rearrangement of elements, becoming 
double, and are joined by the half- lateral xylems about 2 mm. below the coty le- 
donary node. The four phloems, each with a central group of fibres, continue 
unchanged throughout the hypocotyl. The cotyledon trace is composed of a 
pair of collateral bundles with vestiges of the polar protoxylem directly 
between them. 
