484 



therefore thought it better to reply, through this medium, to those who 

 are desirous of obtaining the plant, that I am fearful it is now lost. 

 One plant was found on the walls in J 845, after a most diligent search ; 

 and I am not aware that it has since been met with. In July, 1848, 

 I spent some time in searching for it, and again last summer, but 

 without success. Specimens obtained by Mr. Dawson Turner in 1800, 

 from the above locality, are preserved in the herbarium of the late Sir 

 J. E. Smith. Has the plant been met with in any of its other recorded 

 localities of late ? — and can such localities now be relied upon } It 

 has also been asked whether the present species can be considered a 

 true native on the walls of Old Sarum. I should say it is doubtful 

 and unsatisfactory, and should not myself consider it a truly native 

 species in this county ; and, by its being placed as an " alien " in the 

 ' Cybele Britannica,' I should question its being a true native in its 

 other published localities. — T. B. Flower. 



Hybrid Narcissus. 



In the group of Narcissi figured in the ' Gardener's Magazine of Bo- 

 tany ' (Phytol. iv. 218) there is one named Leedsii, which seems exactly 

 intermediate between Narcissus poeticus and N. Pseudo-narcissus. 

 By a parity of reasoning with that employed in the case of the Pri- 

 mulae, the production of this hybrid would prove the identity of these 

 two Narcissi as a species, a conclusion which, I think, botanists will 

 not be hasty to adopt. — Edward Neivman. 



Effects of Light and Heat on the Expansion of Flowers. 



The observations on this subject at p. 155 are extremely interesting; 

 but the conclusions deduced are not sufficiently precise. The flowers 

 expanded at night, in the meeting-room, " under the influence of gas- 

 light;" they also opened " in the absence of light," in " a warm plant- 

 stove, the temperature of which was about sixty-three degrees." The 

 question naturally arises. What was the temperature of the meeting- 

 room ? — was it lower than that of the plant-stove ?— was it not sufli- 

 ciently high to account for the expansion of the flowers without 

 having recourse to the aid of gas ? The conclusion deduced is, that 

 in the first instance light caused the expansion, in the second, heat ; 

 but such a conclusion is not logical. The experiments ought to be 



