roundness and flatness obtained by art in what are called Florist's flowers ; they are clear yellow 
with a few pale cinnamon-brown spots near the base. The lip has one curved stain of the same 
colour on each side near the base. 
This, the Excavated Oncid, with several others, forms a group in the genus readily known by the 
sepals being perfectly distinct from each other, and smaller, or at least not larger, than the petals, 
or if broader considerably shorter — contrary to what is usual among the neighbouring species. 
Hence, in the table published in our Vlth plate they stood as a sixth section under the name of 
Pentapetala mackopetala, Of that section we will avail ourselves of the opportunity to give an 
enumeration. 
VI. PENTAPETALA MACROPETALA. 
olvulaceum 
mi. Dseudobulbis secus 
tundis monophyllis, folio piano sessili ovato-oblongo obtuso mucronulato, pedunculis basi 
squamatis unifloris folio subsequalibus, sepalis liberis petalisque latioribus oblongis acutis paten- 
tissimis, labello maximo bilobo baseos auriculis linearibus apice dilatatis rotundatis, crista 
elevata truncata utrinque lobata verrucis a 2 fronte, columns alis acute truncatis. 
Native country, Venezuela. Herb. Linden, No. 1444, from the voyage of Funck and Sc 
ilim 
curious 
diffi 
wimner rlnz 
3 or 4 inches, one-leaved pseudobulbs usually springing from the axil of a small leaf; these pseudo- 
bulbs are thin, nearly round, scarcely an inch long, and each bear a solitary flat leaf about 2 
inches long. The flowers, which are nearly 2 inches in diameter, grow singly on peduncles scarcely 
longer than the leaves : thev appear to be spotless, but their colour is unknown. Not in cultivation. 
2, 0. excavatum Lincll. in Bert. orch. sub t. 25. B. Beg. 1839., misc. 150. 
licmlatis 
fonnibus 
I squami 
to, petali; 
membranaceis oblongis basi angustatis, labello sessili pandurato apice rotundato emarginato 
I selkcformi basi cordato convexo fornicatim excavato. crista tuberculata, columnse alis oblongis 
rotundatis. 
Peru 
This has yellow flowers, spotted with brown, and is easily known by the base of the labellum being 
with 
3. sessile of this Plate. 
4 
Hort. Soc. iv. 0. 260 ; alias 0. Bigbyanum, PaxtonMag 
0. panicula racemosa angusta, sepalis liberis obovatis plauiusculis, petalis majonbus 
un 
serrulatis intennedio 
undulato repando emarginato, crista lineari 
itis clinandrio ancuste inarffinato alis carni 
Native country, Brazil. 
