Tas. 5293. 
ONCIDIUM EXCAVATUM. 
Ezxcavated Oncidium. 
Nat. Ord. OrncHIDEA.—GYNANDRIA MONANDRIA. 
Gen. Char. Perianthium explanatum. Sepala sepius undulata; lateralibus 
nunc sub labello connatis: Petala conformia. Ladel/um maximum, ecalcaratum, 
cum columna continuum, varie lobatum, basi tuberculatum v. cristatum. Co- 
lumna \ibera, semiteres, apice utrinque alata. Anthera semibilocularis ; vostello 
nune abbreviato, nune elongato-rostrato. Poddinia 2, postice suleata; caudicula 
plana, glandula oblonga.—Herbex epiphyte, nunc pseudobulbose. Folia coriacea. 
Scapi paniculati, vaginati, rarius simplices. Flores speciosi, lutei, sepius maculati, 
raro albi. Lindl. 
Oncip1uM excavatum ; pseudobulbis oblongis compressis basi apiceque foliosis, 
foliis lineari-oblongis, “ bracteis squameeformibus membranaceis acutis, se- 
palis lateralibus obovatis obtusis liberis supremo concavo acuto, petalis 
membranaceis oblongis retusis basi angustatis, labello sessili pandurato 
apice rotundato emarginato selleeformi basi gordato convexo fornicatim ex- 
cavato, columne alis retusis rotundatis.” Lindl. 
Oncipium excavatum. Lind. in Sert. Orchid. sub t. 25. Bot. Reg. 1839. Mise. 
n.150. Paaxt. Fl. Gard. v. 1, under t. 21. Lindl. Fol. Orchid. Gen. 
Oncid. p. 21. 
B. aurosum, Lindl.; “ flowers deep-brown in the middle, crest very rugose with 
athin vertical plate interposed between the front lateral ridges.” Lindi. /.c. 
OncrpiuM aurosum. &chd. in Bonpl. v. 1. 1854. 
The labours of Dr. Lindley among the Orchideous plants are 
beyond all praise. Of the genus Oxcidium alone he has de- 
scribed a hundred and ninety-eight species, exclusive of eleven 
“insufficiently known,” and he has abolished many bad species. 
No representation of the present very handsome kind has been 
anywhere given, and it is probably yet cultivated in few collec- 
tions. We are indebted for our knowledge of the plant to 
Thomas Dawson, Esq., of Meadowbank, Uddingston, on the 
banks of the Clyde. It was purchased by him, at a sale in 
Glasgow, as “ Oncidium, from Honduras.” Dr. Lindley pro-— a 
nounces it to be his O. excavatum, described from Peruvian _ 
specimens in the Hookerian Herbarium, gathered by Matthews 
JANUARY IsT, 1862. ae 
