No. 490] NOTES AND LITERATURE 



675 



vations are very similar to those made by Miiller and MacLeod in 

 Europe and by Robertson in our own country and it is to be hoped 

 that the author will continue the work with vigor. 



Burck has been engaged in studies of antlier (lehiscence aiul con- 

 cludes (Proc. Kon. Akad. Amsterdam 190(): :■.!)() ;!!•(). and \{r\. (Jrii. 

 Bot. 19: 104-111. 1905) that the opening of the anili. r i> rllf.KMl hv 

 the withdrawal of water from the anther by sii^ar ( ..niaiiicd in tlic 



cleistogamy in three species of the «renus ( liioria. The stii(hi'> were 

 made on herbarium nialeriah The anlhor conehido thai we are 

 here dealing with a real cleistogamy in the sense in Avhieh (loliel nses 

 the term. The characteristics of the eleistoganious flowers are the 

 small size of the calyx, tlie al.sencr of the corolla and a more or less 

 pronounced reduction in the androeciinn. 



Tuzson (Bot. Jahrb. 40: 1 I k IIMI?) has ..iKcrved cleisto,i:aniy in 

 Robinia pseudacacia. Two trees were fonnd lo^^ethci' in the same 



derived from the other hy vegetative reprodnction. Thv individuals 



cleistogamy but insists on the causal rather than the telcoloLM 

 attitude in the investigation of ilie pn.hlem. 



Dop (Bull. Soc. Bot. Fr. IV. 7: lT.s LV,(). I'.Mi:. ;iu-ain di>cn. 

 the mechanism of movement in \\u^ stamens of the lierheridaccae. 



Fritsch (Verb. K. K. Zool.-l5ot. (ie-. \N ien .1(1: i:;.') ir.d. 



