—31— 



before the Section of Botany at the recent meeting of the Amer- 

 can Association for the Advancement of Science be remembered, 

 44 a species is a perennial succession of like individuals," then 

 either Ophioglossum vulgatum, as understood by Mr. Baker and 

 Mr. Davenport, including as it did 0. Engelmanni, 0. Alas- 

 kanum, 0. Calif ornicum and 0. arenariunt, is either a very 

 variable species, with marked differences in habitat and geo- 

 graphical distribution, or the modern view is more correct, and 

 the subdivision of such a species is advisable. Mrs. Britton 

 offered to show the differences and made sketches and deter- 

 minations after the meeting from material which had been 

 brought in to show her. 



