elegant epiphytes, giwving among the decayed vegetable 
matter found upon trees. If planted in a similar substance, 
and kept in a hot damp stove, they may be easily subjected 
to cultivation. They are all, however, at present, exceed- 
ingly rare plants. Cattleya Loddigesii, which is now the 
commonest, only exists in a few couections ; of C. labiata, 
which is the finest, we are acquainted with but two plants, 
both in the possession of Mr. Cattley. The present species 
is in no other collection than that of the Horticultural 
Society, where there is but one certain plant. A single 
individual of C. citrina is also supposed to exist in the 
latter establishment, but it has not yet blossomed. 
It will have been remarked by our readers, that we 
have for some time been endeavouring to establish divi- 
sions iij the extensive tribe of Orchideae, comprising the 
last section in Mr. Brown's system, and commonly called 
Epidendrums. Indeed, so long since as the year 1820, 
we remarked (Coll. Bot. t. 15.) that the parasitical Or- 
~ chidese, with waxy pollen-masses, were capable of being 
separated into at least two divisions, distinguished by cer- 
tam peculiar and important modifications of the pollen- 
masses and their appendages. Having at length, in another 
publication, applied these principles to all the Orchideous 
plants of which we have any satisfactory ihtertwation, we 
think a brief exposition of their final arrangement may not 
be unacceptable to the readers of the Botanical Register, 
especially as the work of which we speak is in the hands 
-of b«t few persons. 
The Orchideous plants with waxy pollen are sus- 
ceptible of the three following modifications of that sub- 
stance. In the first state the pollen-masses are seated upon 
a transparent, generally elastic, body, adhering to the 
upper edge of the stigma by a gland. The elastic body 
has been named by Richard caudkula, and answers to the 
extensile ])cdicel of the common Orchis, and to the fila- 
mentous axis of JVeottiea;. The nature of the gland is 
more doubtful ; but it exists in several tribes of OrchidesB, 
the pollen of which is not waxy. Plants so characterised 
we term Vandece. The second form of pollen- mass consists 
in the absence of the gland, and in the caudicula being 
divided into two or four filiform segments, coYered with 
pollen not in a state of cohesion, and foldied back over 6ie 
