ANATOMICAL OBSERVATIONS ON THE COTYLEDON OF GRAMINEE: 09 
condition there are two varieties, First, the growth may occur in the 
lower part of the unatomical connection : the sheath is then separated 
vessels whic ay r by the union the two 
lateral branches of the cotyledonary bundle* (Lolium, Bromus, Agrostis, 
Alopecurus, Phalaris, Oryza, &e second, the interposed growth 
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tellum is certainly the cotyledon, as Malpighi, Mirbel, &c., admit ; 
bat it is not the whole cotyledon, even if one unites with it, as do 
leat, the cotyledon of the plant. Thus vanish those objections which 
rendered all partial solutions inadmissible. 
“* Comparison of the cotyledonary leaf with the other leaves of the 
plant.—The composition of the cotyledonary leaf in Grasses being 
now well understood, let us endeavour to correlate it with the other 
appendages of the plant, especially with the ordinary vegetative 
leaf, and with the leaf of origin of the flower branch (‘feuille mére du 
rameau floral’). 
*‘ The ordinary vegetative leaf of a Grass is made up of a sheath, a 
blade, and a ligule inserted at the point of junction of. the sheath and 
blade. This last part is usually little developed, without ch!orophyll 
or stomata, and entirely parenchym but in some cases, as M. 
Duval-Jouve has recently shown in Psamma arenaria, it at 
by a rapid multiplication of cells at the very base of the organ. 
It undergoes an arrest. of development. Its sessile blade seine 
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t+ This mode is elsewhere stated to be that found in the majority of Grasses, 
also in Cyperacee and some other Monocotyledons.—[Ed. Jowrn, Bot. ] 
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