PHYSIOLOGICAL BOTANY. 287 



The author follows Kolreuter in applying this term 

 (afterbefruchtung) to abortive impregnation, produced 

 by the pollen of the same plant. 14. On the effect of 

 sprinkling the stigma with foreign matters. Experiments 

 of the author in opposition to Henschel's now forgotten 

 experiments. We anxiously look forward for the second 

 part. 



A Paper, by ROPER, on the Flora of Mecklenburg, 2 pt. 

 Rostock ; contains Researches upon the Flowers of the 

 Grasses, which we recommend all botanists to read. It 

 is especially opposed to Schleiden's theory, viz., that the 

 lower and outer valve of the glume, or the palea inferior, 

 forms a trifoliar perianth with the upper and inner valve 

 of the glume, which originally consists of two valves. 

 It distinctly shows how Schleiden's censoriousness mis- 

 leads him into the greatest inconsistencies. It also con- 

 tains several other investigations of importance. As on 

 most points I agree with the author, it would be super- 

 fluous to make any remarks. Nor is this the place for 

 explaining the true condition of the flower of Lolium temu- 

 lentum (Crap alia, Schrank), regarding which the author 

 appears to be mistaken. One observation more. The 

 author sets philology at defiance, and adopts such ex- 

 pressions as sepalum, tepalum, &c. Language is so re- 

 markable and wonderful a production of the human mind, 

 that it must not be trifled with; an unfortunate proceeding, 

 which has in recent times been especially revived by 

 De Candolle. 



'On the Signification of the Lower Glume of the Flower 

 of Grasses. By HUGO VON MOHL, Bot. Zeit., 1845, 

 p. 33. The author also shows by an analysis of the 

 common monstrosity found in Poa Alpina, that the lower 

 floral glume is not to be regarded as a perigonial leaf, but 

 as a bract. 



Note upon the Organography of the Flower oftheMal- 

 vacece. By M. DUCHARTRE. Compt. rend., 1844, i, 



