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A REVISION OF THE OLD WOULD SPECIES OF 

 VELLOZIA *. 



By Susie Greves, M.Sc. 



(Thesis submitted for the degree of M.Sc, in Botany, 

 London University.) 



The Old World species of this genus are included in the section 

 Xerophyta as defined by Bentham and Hooker in the Genera Pla/i- 

 tarum, iii. 739-40. 



Pax used the names Vellozia and Barhacenia in an opposite 

 sense to that of Bentham and Hooker, depending for distinctive 

 characters solely on the number of stamens ; all species with six 



Fig. 1.— Section through hairs on surface of ovary of V. villosa (highly magnified). 



stamens are placed by him with Barhacenia, while those with more 

 than six stamens come under Vellozia. This arrangement appears 

 to be less satisfactory than that of basing the separation of the two 



* This work was carried out in the Department of Botany, British Museum, 

 at the suggestion of Dr. Bendle, to whom the writer wishes to express hearty 

 "thanks for his encoiiragement and criticism. 



JOURKAL OF BoTAJSY.— VOL. 59. [OCTOBER, 1921.] U 



