105 
progress at the Garden for a number of years. The results with 
species of Hemerocallis may be reported here. Two species of 
this genus are well-known garden plants. One has lemon-colored 
flowers (Hemerocallis flava) and one has orange flowers (H. 
fulva). The literature for H. flava shows that some plants are 
self-fertile and others are self-sterile. It appears, however, that 
H. fulua has never been known to produce fruit and seeds. 
Even the oldest references either make no mention of pods or 
state that they are not formed. 
Plants of H. flava growing at the New York Botanical Garden 
were found to be highly self-fertile; plants of H. fulua were com- 
pletely sterile to all self-pollination and to intra-varietal cross- 
pollination. A third species, H. Thunbergit, was found to be 
feebly or partially fertile to self-pollination. Pollen of H. fulva 
applied to pistils of H. flava led to the production of pods and 
viable seeds, but the reciprocal cross failed. Pollen of H. Thun- 
bergit was applied to a large number of pistils of H. fulva and two 
pods with seeds were obtained. 
The three species are quite alike in vegetative habit and the 
results thus far obtained suggest that the seed-sterility in evi- 
dence is due to physiological incompatibility operating between 
organs of reproduction rather than to purely nutritive relations 
operating between organs of vegetative reproduction on the one 
hand and fruit and seed structures on the other. This is espe- 
cially clear in the case of H. flava. It is however possible that 
both conditions are operating. 
The results obtained with species of Hemerocallis were illus- 
trated by photographs and by pods obtained in the experiments. 
A conference of the scientific staff and the registered students 
of the Garden was held on the afternoon of March 5. Mrs. 
Britton exhibited the collections of mosses belonging to the New 
York Botanical Garden from the Bahamas made on the explora- 
tions which were begun in April, 1904. ‘These collections include 
about fifty sheets and two hundred specimens, which are refer- 
able to fourteen families, twenty-seven genera and thirty-five 
