Notes aNnp Nrews 27 
Elizabeth Wuist Brown describes an experiment 
undertaken to see if regeneration (that is, the replacing 
of destroyed organs by the living plant) could be brought 
about in a fern—it having been reported by a previous 
investigator that this was possible with the young, 
but not the mature, leaves of certain ferns. The 
species chosen for the experiment was Phegopteris 
polypodioides. Spores were sown and when the young 
plants began to develop, leaves were cut from them 
and placed on sand wet with a nutrient solution and 
kept constantly in a damp atmosphere. Out of a 
large number of leaves so treated, one case of regenera- 
tion was obtained. In this instance, the petiole of 
the young leaf produced two cellular structures similar 
to prothallia. These bore no sexual organs, but pres- 
ently put forth rhizoids and young leaves very similar 
to those produced by the prothallia of this species 
under normal conditions. 
The author draws no particular conclusions from 
this single case, except that the possibility of regenera- 
tion and to some degree its extent and direction, are 
dependent on the nutriment available for the plant. 
Dr. W. N. Steil has described a method of staining 
fern antherozoids so as to show their structure, which 
should be interesting to those engaged in microscopical 
study.’ C. A. W. 
ADIANTUM CAPILLUS-VENERIS L. forma cristatum 
f. nov. Differing from the species in having the tips 
of the fronds more or less dichotomously forking and 
crested. Eaton Canyon, San Gabriel Mts., Los Angeles 
County, Cal., September -3, 1917. Geo. L. Moxley, 
° Brown, Elizabeth Wuist ag orn seae in begga polypodioides. 
. Torrey Bot. Me an: 391-397, fig. 1918. 
7 Ste teil, W. N. method for — poreaouialo of ferns. Bot. 
Gaz. 65: 562-563, a 1. June-18, 
