698 Mr. BnowN on the Organs and Mode of 
whose genera analogous processes are found, and in which 
tribes alone cases of their complete development have hitherto 
been observed, vessels not only generally exist in these pro- 
cesses, but may often be traced to their expected origins, 
namely, into those cords which also supply the inner lateral 
divisions of the perianthium. 
Although not necessarily connected with my subject, I may 
here advert to the remarkable monstrosity in the flowers of an 
Ophrys described and figured by M. His* upwards of two years 
before the appearance of my Prodromus. "This account I did 
not meet with till after that part of the volume relating to 
Orchidez was printed; and I have here only to observe re- 
specting it, that neither the monstrosity itself, consisting of the 
conversion into stamina of the three inner divisions of the peri- 
anthium, nor the author's speculation founded on it, has any 
connexion with my opinion which relates to the processes of 
the column. | 
M. His's paper, however, and the remarkable structure of 
Epistephium of M. Kunth, have together given rise to a third 
hypothesis, whose author, M. Achille Richardt, considers an 
Orchideous flower as generally deprived of the outer series of 
the perianthium, which is present only in Epistephium. He 
consequently regards the existing inner series of perianthium, 
or that to which the labellum belongs, as formed of metamor- 
phosed stamina. 
This hypothesis, although apparently sanctioned by the struc- 
ture of Scitaminez, I consider untenable; the external addi- 
tional part in Epistephium, which I have examined, appearing 
to me rather analogous to the calyculus in some Santalacez, in 
a few Proteacez, and perhaps to that of Loranthacez. 
* Journal de Physique, Ixv. (1807), p. 241. 
t Mém. de la Soc, d' Hist. Nat. de Paris, iv. p. 16, 
With 
