To4 BOTANICAL GAZETTE [ AUGUST 
which applies very well except as regards the size of the spores which 
he gives as 6 w in diameter. Notwithstanding this slight discrepancy 
I judge from the general description that our species is P. digtfatum, 
or at least a form of it, an opinion which is corroborated by that of 
Mr. J. B. Ellis, to whom specimens were sent for determination. 
After isolating this fungus attempts were made to produce the 
decay in sound oranges by-infection with spores from artificial cultures. 
In some cases the spores were simply placed on the rind without punc- 
turing it, while in others the rind was broken. The same was also 
tried with spores of P. g/aucum. In each case the oranges were placed 
in a moist chamber to ensure the germination of the spores. These 
experiments showed that the characteristic decay is produced by P. 
digitatum, but not by P. glaucum, though the latter may come in 
eventually and much more readily where the rind is injured. It was 
also found to be greatly favored by a moist atmosphere and close 
packing together of the fruit. 
In the accompanying plate there is shown an enlarged section of 
the decaying orange rind. Ramifying through the cells are seen the 
numerous very large filaments which produce the decay. At the sur- 
face the filaments aggregate here and there into little pustules which 
send out clusters of aerial hyphz as shown in the figure. These form 
the white mold which appears on the surface of the decaying fruit. 
On the ends of these filaments the spores are produced (as shown at 
2), which give the mold its brown color. 
It is interesting to note that since these studies were made the 
laboratory where they were carried on has become thoroughly infested 
with P. digtfatum, which appears at every favorable opportunity, even 
more commonly than P. glaucum.—Ra.Pu E. Smitu, ass. Agricul- 
tural College. 
NOTES ON NEW MEXICAN FLOWERS AND THEIR INSECT 
VISITORS 
PROFESSOR HERMANN MULLER, in Zhe Fertilization of Flowers 
570, remarks that in his experience it was rare to find a particular 
insect visiting exclusively or almost exclusively a particular flower. 
He cites only seven instances of this sort, all bees. Dours, in his 
monograph of the bee genus Anthophora (1869), remarks : “ Quelques- 
unes, toutefois, fréquentent avec plus de prédilection les mémes especes 
