1887. | BOTANICAL GAZETTE. 259 
had the benefit of them flourished, and the tubercles were highly devel- 
oped. It will be remembered that Prof. H. Marshall Ward (Bor. Gaz. 
gen supply 
Dr. GrorGE VoLKENS has published a series of observations on the 
plants of the Egyptian and Arabian desert. According to Gardener's 
Chronicle the physiological history of the plants is given in relation to the 
absorption and transpiration of water, the assimilation or digestion of 
, the mechanical frame-work, etc. All these phenomena are more 
or less modified to suit the remarkable climatal conditions that prevail. 
: RED PATCHES on the leaves of Chenopodium album, the common 
pig weed, is found by Prof. H 
Science for September 30 
insect is quite common, it seems to have heretofore escaped observation 
in its larval form. The conjecture is hazarded that it is the cause of the 
change of color in the leaves. 
of Science appea ue e sixth contribution 
ii Greene, entitled “Studies in the botany of California and 
parts adjacent,” has n me to hand, containing (1) notes on the botany 
of Santa Cruz Island, (2) a catalogue of the flowering plants and ferns of 
the Island of Santa Cruz, (3) three new species. 
The last number contains two parts, xvii—Annotto (Biza Orellana 
and xviii—Notes on articles contributed to the museum of the nate 
Gardens, Kew, from the Colonial and Indian aaron 1886. Only 
pungens of various authors (not HBK.) becomes A. Manzanita Parry ; 
.__SOME RECENT researches of Molisch on the fall of leaves, as summar- 
ved in the Bot. Zeitung for July 29, are of interest. Molisch finds tbe 
ormation of the separating layer to be chiefly dependent upon unusu 
