PHYSIOLOGICAL BOTANY. 281 



the garden at Pisa, and briefly describes them in a note 

 to Meneghini and Savi's ' Memoir upon the Appendages 

 of the Leaflets of Acacia Cornigera/ in the ' Giorn. 

 Enciclop.' i, p. 406. These appendages occur upon the 

 point of the leaflets, but only of the lower ones ; they are 

 absent in the upper ones towards the point. They are 

 elliptic-elongate, of one sixth or one eighth part of the 

 length of the leaflet, of a whitish-yellow colour, and are 

 furnished with a central nerve, which is a prolongation of 

 the nerve of the leaf. Around the central nerves spiral 

 vessels occur ; the rest consists entirely of cellular tissue. 

 He then treats of the morphological character of this 

 appendage, and of the view that they are probably abor- 

 tive buds, according to Gaudichaud's theory, in which 

 the leaf is considered as a phyton. Although it cannot 

 be denied that the leaves may be considered as such, 

 when Cardamine pratensis is adduced as an example, 

 they must rather be regarded as degenerations of the 

 extremity of the teeth of the leaves themselves, or their 

 entire margin (come degenerazioni deW eslremita delle 

 dentellature delle foglie stesse e del loro totals). Were 

 this not the case, they must be considered as glands, 

 which view, however, is opposed by their constant posi- 

 tion at the margin of the leaves, and especially at their 

 most prominent points. The appendages are evidently 

 so-called glands, which do not secrete any fluid. Their 

 morphological character, in my opinion, is an indication of 

 a tendency of the leaf to become again pinnate. Perhaps 

 the authors entertain the same opinion. 



KIRSCHLEGER has described the stipules of Platanus. 

 Flora, 1844, p. 725. These structures, which have been 

 long known, are merely described by the author, because 

 Endlicher says, when speaking of the PlataneaB, stipulce 

 mdlce. But Endlicher is right ; they are not stipules, but 

 ochrece, such as exist in the Polygonese, &c. They are 

 not situated at the sides of the petiole, but surround the 

 axis above the base of the petiole. 



