3 
5. BOLBOPHYLLUM fuscum; pseudobulbis oblongis obtusé tetragonis 
diphyllis, foliis lineari-oblongis patentibus emarginatis, spicá pedunculatá 
distichá ancipiti glabrá pendulá, bracteis ovatis cucullatis acutis coloratis 
distantibus florum longitudine sepalis triangularibus acutis, labello trilobo 
carnoso laciniá intermedia convexá rotundatá lateralibus brevioribus magis 
. membranaceis acutis serrulatis. 
Nearly related to B. tetragonum, like which species it is 
a native of Sierra Leone. The flowers are a deep dull 
chocolate colour, and are chiefly remarkable for the beauty 
of their anatomical structure. Like Liparis pendula they 
are studded with large transparent cells, containing raphides 
in cubical parcels, and they are moreover filled with short 
spiral vessels, so closely filled with air that it is difficult to 
drive it out even with the aid of theair-pump. Imported by 
Messrs. Loddiges. 
6. QUEKETTIA microscopica. A very singular little 
plant, with the habit of a Pleurothallis, and the pollen- 
masses of a Vandeous Orchidacea; more nearly allied to 
Rodriguezia than to any thing else, but quite different in 
habit, and essentially distinguished by its cylindrical peri- 
anth, and labellum not only parallel with the auriculate 
column throughout its whole length, but excavated at the 
base, and furnished there with two callosities like those of 
Spiranthes. Its leaves are terete, subulate, about three 
inches long, and beautifully mottled with light green, deep 
green, and purple. : 
Although this little plant is only a few inches high, and 
has no attractions for the vulgar eye, it is in some respects 
one of the most interesting 1 know, if examined microsco- 
pically. Nothing can be more beautiful than the fabric of 
the leaves below the epidermis, and it undoubtedly deserves 
more examination in this respect than 1 am at present able 
to give it. The flowers abound in raphides, clustered in 
cells larger than those which surround them, and of a diffe- 
rent colour, so that the flower, when examined with low 
powers of the microscope, looks as if it were dotted. I have 
observed this already in Liparis pendula (Bot. Reg. 1838, 
misc. no. 128.), and in Bolbophyllum fuscum, and it will 
probably be found a common structure in the sepals and 
petals of Orchidacee, as we already know it is in their leaves 
and stems. "The caudicula is excellently adapted to shew 
