230 BOTANICAL GAZETTE [MARCH 
hypha had curved, and suspensors had developed on opposite sides of 
the coil (fig. 1). The appearance of the remnants of the wall between 
the gametangia showed that conjugation had taken place. While 
investigators have disputed Dr. BLAKESLEE’s results that plus and 
minus strains are necessary for sexual reproduction, so far as we know 
the observation of conjugation between two closely approximate parts 
of the same hypha has not entered into the discussion. This peculiar 
FIG. I 
mode of conjugation was: accidentally found in some material grown 
from spores obtained from-J. I. HaMAKER of Randolph-Macon Woman’s 
College of Virginia. The culture was grown on bread moistened with 
a solution of grape sugar, and zygospore-formation was unusually abun- 
dant. Dr. Braxestxr in his article in the Borantcat GazeTTE of 
June 1907 admits the possibility that a homothallic race may occur 
in a species normally heterothallic; and the case just cited substantiates 
that possibility —FrLorence A. McCormick, The University of Chicago. 
PISTILLODY OF STAMENS IN HYPERICUM NUDIFLORUM 
A plant of Hypericum nudiflorum Michx. cultivated at the Arnold 
Arboretum and in. full bloom during the first week of October, while 
another plant of the same species had almost mature fruits, presented 
a very good example of pistillody of stamens. The inflorescence and 
the flowers did not at the first glance show any deviation from the normal 
except that the regular arrangement of the stamens seemed somewhat 
disturbed, but a closer examination revealed the presence between the 
