[89]

Annales des Sc. Nat. Bot. Tom I. 1875 p. 324. Duval-Jouve has a very interesting paper on the movement of the leaves of various grasses —

p. 325 When leaves sides of the blade of leaf of Leersia oryzoides rolled themselves is also inwards almost instantaneously, "dont je froissais la base en la rabatant le long du chaume"— commenced at the point & extended to near the base of "du limbe froissé".

Translated Section. of Sisleria cærulea under microscope rolled expanded themselves in, when touched with a drop of water — due to "cellules bulliformes se montrerent grandes et a parois distendues." With Glyceria fluitans (p. 326), the margins are expanded almost flat in a humid morning, but as day became hot rise up to angle of 45°— So with Andropogon with Brachypodium ramousum always roll themselves inward during hot weather & expand during the the humid freshness of the night.

So with others, [illeg] (p. 329) "les cellules bulliformes paraissent perdre leur turgescence a la suite d'une evaporation diurne excessive

over

[page 324 is abstracted at CUL-DAR68.88-90

", et, par leur contraction, entrâiner le mouvement du limbe, avec autant plus de facilité…

It is very odd that drying after being wet causes the involution

Mais en pliant le limbe ou en l' enroulant, elles diminuent d' autant les surfaces d' evaporation, & comme à cette diminution de transpiration de joint l' humidité nocturne; et que l'activitè d'absorption des racines demeure constante, les cellules bull: reprennent leur état de distension, et le limbe s'élate ne nouveau."—

This is very important as showing a very distinct mean to check evaporation, & renders use of bloom more probable.

I saw what I believe to be the cellules bulliforme on the Elymus

[in margin:] It is very odd that drying after by water cause the involution."