158 ‘ERYTHEA. 
Castilleia plagiotoma, Gray. Chorizanthe brevicornu, 
C. affinis, H. & A. 
Eriogonum delicatulum, Oxytheca luteola, Parry. 
ats. Calochortus flexuosus, Wats. 
i. crenulatum, Parry. C. Kennedyi, Porter. 
E. angulosum, Benth. Salsola Kali, L. 
The last, the Russian Thistle, is a recent importation, 
having been first observed two years ago, though, from the 
number of plants then existing, it had probably been intro- 
duced two years prior to that. Be this as it may, there is no 
doubt of its existence now over a considerable area of the 
desert lands. It grows freely in the streets of Lancaster, or 
in any ground where the surface is occasionally disturbed 
and is thus more likely to prove a pest in cultivated fields 
than in orchards or in open ground. I observed it 
near Del Sur, ten miles west of Lancaster, where it was pro- 
bably carried by the wheels of passing teams, and it requires 
but a season or two more of neglect to be thus carried over 
all the roads in the valley. Ten miles to the south-west it is 
also established, and the local authorities, by way of exter- 
minating the pest, have destroyed all the old and already 
fruited plants, and have left those of this season’s growth to 
mature at will. 
NOMENCLATURE AT THE SPRINGFIELD 
MEETING OF THE A. A. A. 8. 
By Caarues Lovurs Ponnarp. 
The meeting of the American Association for the Advance- 
ment of Science, held recently at Springfield, though less 
fully attended than usual, was certainly a success from a social 
and scientific point of view. So far as attendance is con-- 
cerned, it is open to question whether the gatherings of 
