[88]

Elymus arenarius

Nov. 8' to 15th

Salt-water, fresh-water, alcohol, acetic a syrup placed on leaves have not caused involution; but then weather generally cloudy, one day, however, sun shone & hot. — I therefore conclude that before it was action of hot-sun which somehow acted.

Nov. 21' ie after an interval of 13 I now observe that the 2 leaves on which salt-water rested & none has been added during the last whole week, are now turned yellow & evidently injured. — Salt-water was added During 5 or 6 days. —

[89]

, 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.

[Part of an abstract of Duval-Jouve, 1875.  Histotaxie des feuilles de graminées. Annales Des Sciences Naturelles Botanique: 294-371, at CUL-DAR68.89r]

[90]

Elymus condensatus (The Bunch-grass of British Columbia) evidently not saline. (tried with salt-water)