32 
A longitudinal section of this small radicle may be seen in fig. 48, 
Pl. VI. The seutellum-bundle forms a loop in the axis as in fig. 48, a 
strand branching off from it forms the central bundle of the first true 
leaf. Fig.45, Pl. V, represents a section facing the embryo. The main 
radicle with its two lateral radicles to the right and left are all sur- 
rounded by a coleorhiza. Figs. 44 and 46 A and B, Pl. V, represent 
longitudinal and transverse sections through the whole fruit showing 
the relative size of endosperm to embryo. ; 
Holcus lanatus (fig. 51, Pl. VI.), Arrhenatherum elatius (fig. 49), and 
Danthonia spicata (fig. 50) all have a small epiblast and a single termi- 
nal radicle with the scutellum-bundle inserted directly under the 
plumule. 
Tribe CHLORIDE Æ. 
The Chloridew, according to the characters of their embryos, are 
more closely allied to the Andropogoneæ than to the Avenew and Festu- 3 
cec, with which they are placed in Hackel'sclassification. The fruit varies d 
considerably both in regard to ifs form and the structure of the embryo. id 
There is a spherical nut-like fruit, as in Eleusine (fig. 52 A-D, PL VI), 
with a well-marked epiblast, and a long linear fruit with an embryo — 
more than half the size of the fruit itself and without an epiblast, as in : 
Spartina gracilis (fig. 53). The scutellum is inserted on the axis at SED 
some distance from the plumule. 4 
Eleusine coracana (fig. 52 A-D, Pl. VI).—This peculiar nut-like fruit 
has an embryo with a very large epiblast. The radicle is in a hori- 
zontal direction, while a deep groove is present between the scutellum : 
and coleorhiza. The insertion of the scutellum-bundle is close to the 
base of the plumule, while the axis between the plumule and radicleis 
very short. Fig. 52 A represents a longitudinal section through the 
embryo, while at B we see the plumule with the large epiblast pro- 
ting it. 
7 T 
fromthe plumule-sheath. One single vascular st 
ened node until it sends off a branch to the scutellum, and then con- 
tinues down into the very small radicle. Fig. 54 A, B, O show sections 
through the radicle, lengthened node, and plumule, respectively. It is : 
noteworthy faet that this is the only genus of the Chloridew examined 
which does not have an epiblast. : 
Astrebla pectinata (fig. 55, Pl. VI)—The embryo of Astrebla is very 
large, with a very small epiblast. A deep groove is present between 
the seutellum and the coleorhiza. The seutellum-bundle is inserted on 
he axis at some distance from the plumule, The axis terminates in 
a single radicle, which preserves its root structure until just before it 
reaches the insertion of the scutellum, where vascuiar bundles appear 
