324 Mr. Griffith on the Root- Parasites referred to Rhizanthese, 



the most opake part, being next the axis. There is no distinction of pith, 

 medulla or bark. 



In the fascicles vessels are very abundant, preponderating over the fibres ; 

 they are ducts, and are here and there unrollable. Vessels of a similar nature, 

 but smaller and with a less approximate fibre, occur in the fascicles of the 

 laciniee of the perianth, which have a dicotyledonous venation. The para- 

 sitism appears to be analogous to that of some species of Orobanche. 



Obs. II. — The specimens I have examined do not agree very well with the 

 character of Cytinus given by Endlicher*, who has adopted the suggestion of 

 Jussieu regarding the generic identity of Thunberg's Phelypoea with Cytinus. 

 In this combination of the Cape and European plants, Mr. Harvey is fully 

 disposed to concur. M. Endlicher describes the genus as monoicous, as having 

 the stamina double in number to the lacinise of the perianth, and the placentae 

 as eight in number. 



Other differences depend upon the opinion formed of the nature of the parts. 

 M. Endlicher, following Jussieu and M.Brongniartf, considers the filaments (or 

 synema) as being connate with the rudiments of the styles, and the anthers as 

 connate " in capitulum stigmatum rudimentis superatum." This view agrees at 

 first sight with the appearances presented by the column of Thottea and Asi- 

 phonia, and perhaps with those presented by the vascular apparatus of the 

 male column. Nevertheless, I would rather consider the terminal teeth or 

 lobes of the staminal column, as Mr. Harvey indeed has done, to be produc- 

 tions of the connectiva beyond the locuU of the anthers, with which they have, 

 so far as I have been able to judge, a determinate relation both as to number 

 and continuity. And perhaps the complete separation of the sexes is further 

 pointed out by the absence of rudimentary stamina from the female column, a 

 circumstance which does not obtain in Sapria or Brugmansia. To this how- 

 ever the obvious hermaphroditism of the flowers of Hydnora may, perhaps, be 

 opposed. 



Obs. III. — This is one of those instances in which there is, I think, difliculty 



* Loc. cit. 



t Ann. Sc. Nat. i. 29. t. 4. The figure by M. Brongniart certainly presents an appearance as if the apex 

 of the staminal column was crowned by irregular teeth in two series. On the other hand, in Hooker's 

 illustrations of C.Hypocistis (Exotic Flora, 1. 153.) each anther is clearly represented as terminated by 

 a tooth, without any appearance of a crown, as suggested by the description of M. Brongniart. 



