the species described by Watelet’ from the Paris basin, par- 
ticularly Chara depressa and C. onerata. It differs from the 
former, which has only seven turns of the spiral visible in 
side view, and from the latter by its smaller size and also in 
the number of turns. 
U.S. National Museum. 
BRIEFER ARTICLES. 
o there is no doubt in my mind that when we find almost every flower on 
.. ee fertile, that plant may be classed as a self-fertilizer. It may be 
ee t 
cross-fertilization is a benefit to the race in the long run; the fact_ 
__ Temains that where flowers are so arranged as to require external agency 
|) Pollination, the agents often fail to do the work, and numberless 
E flowers are infertile. It is said by those who believe clover requires 
__-“oss-fertilization that the flowers are barren in New Zealand and other 
| _ Pieces where the proper insect agents do not exist. 
a fertilizers, Rarely, indeed, does a flower fail to produce seed.. When we 
nent for Securing self-fertilization, aside from cleistogamy——THoMAs 
Merny 
6 ae 
_Pescrip. a. pl. Foss. d. Bassin de Paris. Paris, 1866. pp. 50-56, pl. 15. 
Veronica peregrina.—It may not be safe to lay it down as a rule, but. 
BOTANICAL GAZETTE. SG 
~ 
