4 ERYTHEA. 



Epilobium angustifolium, L. , grows in very showy masses 

 •along streams, and is much frequented by hive bees. Boinbus Cali- 

 Jornieus also visits it. I find that my notes on the floral structure do 

 not differ from Miiller's, except that I do not see that the style length- 

 ens after the flower expands. In fact, the style always seems unduly 

 toag. During the dehiscence of the anthers it protrudes awkwardly 

 without the corolla, and after it erects itself the stigma lobes are so 

 high as to often miss contact with the bees. I observed many visits 

 of hive bees, and only one bee in five, on the average, touched a 

 :stigma. 



OENOTHERA BIENNIS, L. In the valley these flowers open about 

 6 P. M., and are nearly closed at 9 a. m. The stigmas are from 

 •one to three lines beyond the anthers, but I have frequently seen 

 them wind-pollinated, a slight breeze being sufficient to land the 

 pendant masses of webby pollen against the stigmas. At 7:30 p. m. 

 I found pollen on nearly all the stigmas, although I had seen no 

 night moths flying. The odor of the flowers is very faint, but they 

 are large, three or three and one-half inches in diameter, and pale 

 enough to be conspicuous at night. 



OENOTHERA Californica, Wats. The plants in Bear Valley are 

 low, almost acaulescent, but grow in masses. The flowers vary con- 

 siderably in time of opening and closing, but they are always in full 

 flower by 6 p. m. and remain expanded through the night, when 

 they are very fragrant and conspicuous. I have seen hive bees 

 collecting pollen from them at 5 p. M. They are likely to strike 

 stigmas first, since the stigmas slightly exceed the anthers. Honey 

 is not abundiuit in the evening. I did not observe them during the 

 night, but in the morning the honey is sometimes an inch deep in the 

 tube, the pollen is gone from the anthers, the stigmas are visibly 

 pollinated, and one usually finds pollen grains at the slight angle in 

 the calyx tube. 



Saecodes sanguinea, Torr. The essential organs of these 

 flowers were past maturity when I reached the valley, but there was 

 still some honey in the flowers, and I saw them visited by humming- 

 birds, bees, and tln-ips. 



