1887. | BOTANICAL GAZETTE. 307 
Pror. Joan Macoun is now engaged on Part IV of his “ Catalogue of 
Canadian Plants,” which will be published next ae It will contain 
— 
ready for distribution. 
J. Krutrscanirt, of New Orleans, has been making some observa- 
ons on “ Sarraceniacee or Pitcher Plants.” Among them we quote the 
G. Karsten has discovered that under certain circumstances Fega- 
tella (Conocephalus) conica reproduces by gemme2. 
only formed when the conditions are unfavorable for growth and the 
thallus is about to die. The whole vegetative strength is then concen: 
subjacent layer. Upon the return of suitable conditions for growth these 
SEVERAL METHODS for preparing orchids for the herbarium so as fo 
preserve their colors have been tried by R. Hegler, and the results 8 
Me ; 
success by dusting the dry substance upon the plants as ae lie in the 
may be dj ; ; ‘ood r : 
y be used in the same way with nearly as g ied by moistening 
low the flowers in 
bout the 
flowers, forms a simple method of attaining the same end. 
W. Ottver has investigated the mode of conduction ot ve 
ey 
irritation in the stigmas of Martynia lutea and proboscidea an poet 
luteus and cardinalis, and believes it to be due to the continuity of pro 4 
plasm from cell to cell, which he was able to demonstrate by er 
0 
upper e 
spirally thickened tracheids. The bundles from the two stign 
unite before they reach the ovary. The reese a confin oops 
dle was demonstrated by the fact that it was not 
bundle.—Jour. Roy. Mic. Soc. — 
* 
