301 



sages, the intercellular substance or enchyraa being replaced by air 

 or gas, the nature of which is unknown. 



*' (f). That this emphysema causes the discolouration of the granules 

 of chlorophyll contained in the cellules of the variegated diachyma. 



" (g). That the variegation is always produced according to a cer- 

 tain number of types, which are repeated throughout numerous diffe- 

 rent orders and species ; and that all variegated leaves may be 

 distinguished by the following terms : — 1, margined ; 2, bordered ; 3, 

 discoidal; 4, zoned; 5, spotted; 6, reticulated; 7, striped; 8, marbled; 

 9, variegated by half ; 10, variegated at the point ; 11, fasciate ; 12, 

 entirely discoloured, 



" (h). That this last phenomenon constitutes albinism or complete 

 whiteness in the leaf, and is never reproduced from seed, so that it is 

 an individual malady. 



" (i). That the occasional causes of variegation are numerous, and 

 have their source in many assignable conditions. 



" (j). That variegation is closely connected with disturbed vege- 

 table respiration, and that, consequently, it is to plants what pulmo- 

 nary emphysema is to animals : with the former, its seat is in the 

 leaves, which are the true lungs of plants. 



" (k). That in it this is necessary to distinguish general emphy- 

 semas which affect the whole plant from local variegations." 



* The Beautiful and Picturesque in Garden Scenery.' 



' Osbeckia stellata,' being the description, figure, &c., of a free- 

 growing stove plant of the order Melastomaceae. It has large, showy, 

 lilac-coloured flowers, and was introduced into this country from the 

 Botanic Garden at Calcutta. 



' On the Application of Coal Soot as Manure ; by Mr. J. Towers.' 



* Botanical Fragments :' — ' Chlorosis.' ' Stylidium mucronifolium.' 

 Dr. Planchon suggests that the plant described in "a previous number 

 under this name is not identical with Sonder's plant of the same 

 name, and proposes to call it Stylidium Hookeri. ' Stipules of Cin- 

 chona.' ' Mimosa Bark.' ' Peat.' ' Hardy Ferns.' ' Reindeer Moss.' 

 ' New Fact in Vegetable Physiology.' These six paragraphs appear 

 to be extracts from the ' Phytologist ' and ' Zoologist.' ' Bryanthns 

 erectus.' The plant so called has been artificially produced from seed 

 of Menziesia erapetriformis fertilized with pollen of Rhododendron 

 chamEecistus. The production of a plant intermediate between two 

 recognized genera is of very rare occurrence. It would be a point 

 of great interest to ascertain what would be the character of plants 

 produced from its seed, and whether they remained constant or 

 resumed the characters of either parent. 



