ME. C. B. CLABKE ON ABNEBIA AKD MACEOTOMIA. 



525 



The 



Dimorphism has now been noticed in very many genera, 

 present case is noticeable for two 

 reasons : — 



1st. In the ' Genera Plantarum,' 

 ii. p. 837, Bentham and Hooker, 

 not noticing the dimorphism of 

 these two genera, have separated 

 Amelia, as having a bifid style, 

 from Macrotomia, having an entire 

 style, and have removed (Gen. PI. 

 ii. p. 862) Macrotomia perennis, 

 Boiss., to A)*nebia. The limits of 

 these two genera, if two are to be 

 maintained, will have to be recon- 

 sidered. 



2nd. One of the earliest good notices of dimorphism relates to 

 Macrotomia. Fischer & Meyer, ' Enum. PL Schrenk.' p. 34 (pub- 

 lished in 1841), write of Macrotomia perennis, Boiss. (under the 

 synonym Stenoselenium perenne): — " Flores poly garni ? Inveniun- 

 tur enim specimina brevistyla, quorum flores staminibus instructi 

 sunt ad faucem corolla? insertis et stylo tubo corolla; duplo bre- 

 viore : adsunt alia specimina longistyla staminibus in media parte 

 tubi corollas insertis, stylo tubum superante." 



Macrotomia perennis, Boiss. 

 Fig. 7. Long-styled form. 



8. Stigma thereof. 



9. Short-styled form. 

 10. Stigma thereof. 



LIHir. JOUKN.— BOTANr, VOL. xvtn. 



