PHYSIOLOGICAL BOTANY. 279 



Cepa is also furnished with a leaf-plate, as is seen in 

 young leaves. The subdivision, <?, shows that the whole 

 section gives but an indefinite and unpractical summary, 

 for the relations of the principal nerves and their distri- 

 bution is entirely unnoticed.* 



In this Gazette, for 1844, i. 134, there are some 

 Observations upon the Growth of the Organs of Vegeta- 

 tion, considered in a Systematic Point of View, by A. 

 GRISEBACH. They were made upon Phlox paniculata, 

 Dianthus plumarius, Saxifraya hypnoides, Peucedanum 

 Alsaticum, MenyantJies trifoliata, Aristolochia Sipho, and 

 Ampelopsis hederacea. To these are added some remarks 

 upon the growth of stipules. As the observations, so to 

 speak, are special, they cannot be reduced into an ab- 

 stract. There is a supplement at p. 345, which treats of 

 the vegetating points in the sheaths of the leaves. Sin- 

 gularly enough, parent-cells and secondary cells within 

 them are here spoken of, although, at p. 138, the author, 

 from his observations upon Phlox paniculata, arrives at 

 the conclusion that in it the longitudinal growth of the 

 lamina is effected by Mohl's cell -division. 



Upon the Occurrence of Sugar upon Leaves. By Pro- 

 fessor VON SCHLECHTENDAL. Bot. Zeit., 1844, p. 6. 

 The author especially describes the glands secreting sugar 

 in Viburnum Tinus ; they exist at the margin of the leaves 

 near the base, one on each side, projecting like a short 

 tooth. When the plant is kept in a room in the winter, 

 a white lump of sugar arises on the surface of these glands. 

 Since the lump of sugar in Viburnum Tinus, as also in 

 Rhododendron Ponticum and Clerodendron fragrans, are 

 only observed in plants living in a room, the author 

 supposes that the saccharine liquid is solidified by the 

 desiccation. 



* The reporter gives but an imperfect idea of this paper. The Nieder- 

 bldtter or inferior leaves are the bud-scales and analogous structures, the 

 frondose leaves are the general leaves of the stem, the Hochbldtter or supe- 

 rior leaves, the bracts, &c. Eugl. Ed. 



