54 ANATOMICAL OBSERVATIONS ON THE COTYLEDON OF GRAMINEX. 
those in the vegetative leaves = most Grasses, and of a kind similar 
to the ligule of Psamma arenaria; it is provided with two lateral 
nerves, en cana of which it nett shictophesti and stomata ; it is 
the pileo 
ve The] leaf of origin of the flower branch, or, as it is generally called, 
ee ates * glume* (‘ glumelle inférieure de la fleur’), is compose ed. 
n its turn of three distinct parts, of which the recent paper of M. 
of the organ above the point of attachment of the awn, often bifid, 
always deprived of a median nerve, but rm which the two lateral nerves 
tion of the awn is formed more tardily, and in certain plauts elongates 
but very little or not at all, so that the awn and the upper region of the 
flowering glume remain sessile. last case~the identity of 
composition between the cotyledonary leaf and the ap ng glume 
is complete. The scutellum of the one corresponds to the awn of 
the other, and the pileola of the oe ig a still pete develop- 
sencnk t, to the bi-nerved ligule of the latt 
“From the vegetative leaf, then, we ans to the flowering glume b 
a transformation of the blade, a greater development of the li ule, 
to the cotyledon of ‘the ssi Ther re is a ure, es souseietion: 
edt otyledona i end presents 
in a great number of Sees a pei condition of which I 
know ane Saris: a = the other ee of the plants in this family. 
This tion of the blade (scutellum) from its bistipular 
ligule (pileoley Height about by the interposed growth of the stem, 
or elongation of the cotyledonary node of which th the _— occupies 
i d 
temarks follow upon the of origination of the embryo in 
relation to the mother plant, seunidsesh on the view of its being an 
axill. uction of the ing glume. The author then con- 
siders the cotyledon in Cyperacee, and then in some other Monocotyle- 
dons. He concludes :—* The Grasses and Cyperacee are distinguished 
er pale” of many English botanists, whi adopt R. i 
sieiedianine , the flowers of Grasses.—[Ed. Journ. "Bot. aid Brown’s in 
t+ Etude Anatomique de? sie des Graminées (Mém, de V Acad, des Sciences et 
Lettres de Montpellier, 1871). M. Duval-Jouve in this eginoes further 
in the awn 5 rasses when comp te two s—a ‘eps eee portion, the 
sent, and a terminal part not tw wiided. the le; corres’ ay 
enna to the petiole and true blade of the exter ey foling e leaf [Ea 
04 
