SEMIDOUBLE FLOWER OF OPHRYS ARANIFERA. 209 
regular, but the column is triandrous *, the three stamens (ac- 
cording to the diagram of its structure given by Lindley t) per- 
taining to the outer row. Richard, as cited by Moquin-Tandon, 
Lindley, and others, describes and figures a peloria of Orchis lati- 
Jolia with regular triandrous flowers f. 
In a flower of Habenaria chlorantha, described by the late Prof. 
Henslow §, the outer three stamens are suppressed, while two of 
the inner group are present, as happens normally in Cypripedium. 
Wydler describes a flower of Ophrys aranifera in which one 
outer and two inner stamens were present ||. I have myself met 
with three such flowers among the series referred to in the be- 
ginning of this note. 
Alphonse DeCandolle € figures a flower of Mazillaria in exactly 
the same condition, so far as the stamens are concerned, as those 
just mentioned. It is curious to observe that in many of these 
cases the two lateral petals are suppressed. 
Dr. J. E. Gray exhibited at the Botanical Society of London, 
in August 1843, a specimen of Ophrys apifera with a triandrous 
column, the supernumerary anthers belonging, apparently, to the 
inner whorl. 
In his Catalogue of the Plants of South Kent, the Rev. G. E. 
Smith ** describes and figures a flower of O. aranifera with a 
triandrous column, seemingly of the same kind as that spoken of 
by Dr. Gray. 
I have examined in the Royal Gardens at Kew a flower of Catt- 
leya crispa in which were three stamens, the central one normal ; 
the two lateral ones, belonging probably to the inner whorl, were 
in appearance like the lateral petals, and one of them was ad- 
herent to the central perfect column. A flower of Cattleya violacea 
also afforded me a similar instance; but in this case only one of 
the inner stamens was developed, and this in the form of a small 
petal, partly adherent to the column. 
Dr. Seubert +} figures a flower of Orchis palustris in which there 
were four placentas alternating with the outer divisions of the 
perianth ; but in this case the pistil was one-celled, and the whole 
* Lindl. Orchidol. of India, Journ. Linn. Soc. iii. p. 9. 
t Lindl. Veg. K. ed. 3. p. 183, a. 
f Mém. Soc. d' Hist. Nat. ii. 1. p.212, pl. 3. 
$ Journ. Linn. Soc. ii. p. 101. 
| Archiv der Botan. ii. p. 300, tab. 16. fig. 11. 
© Monstr. Végét., in Neue Denkschrift. p. 17, pl. 7. 
** P,56, tab. 4. fig. 16. ++ Linnea, xvi. 
