Hookeriane. 3 : e Tab. 247. 
ONCIDIUM BARBATUM. 
Nar. Orv. Orchidew. Sect. 5. Br. Lann. Syst. Gynandria Monandria. 
ONCIDIUM Sw. Labellum explanatum lobatum basi tuberculatum. Petala patentia, (2 antica nunc comnnata). 
Columna alata. Massz pollinis 2, postice biloba : medio aflixee processu communi stigmatis. Br. i Hort. Kew. 
ed. alt. 5. 215. | 
aaa 
Oncip1um (barbatum) foliis planis oblongo-lanceolatis, laciniis perianthii obovatis undulatis obtusis : inferioribus bast 
connatis, labello transverso laciniis breviore: lobo medio barbato, apice producto imberbi semi-bifido, lateralibus 
majoribus planis rotundatis, alis column rotundatis. : 
Descr. Bulbosa. Folia plana, oblongo-lanceolata, emarginata, suberecta. Panicula flexuosa, multiflora, sparsa. Perianthit 
lacinie patentes, lanceolate, undulata, obtuse, labello longiores, fulve, maculis atrioribus variegate : due inferiores exteriores 
angustiores, parte inferiore connate; interiores latiores. Labellum dependens, 3-lobum, luteum ; lobo medio convexo, in 
discum sanguineo maculatum tuberculato, fimbriato, apice producto, imberbi, semi-bifido ; lateralibus rotundatis, unguiculatis. 
Columna cum labello continua, porrecta, laciniis feré triplé brevior, semiteres, lutea, dorso pune variegata, apice utrinque 
ala rotundata instructa. Gynizus subrotundus, concavus. Anthera opercularis, terminalis, decidua, 1-locularis. Pollinis masse 
2, posticé sulcate, infra apicem pedicelli carnosi inserte, glandula brunnea apici stigmatis aflixe. 
ERE SL eg a RTE 
For the figure of this new species of Oncidiwm we are indebted to Dr. Hooker. It was received by him, with 
several other fine Orchideous plants, from William Swainson, Esq., who collected it during his residence in Brazil. 
In the latest enumeration of the species of this genus, which we believe is in Persoon’s Synopsis, only five species 
are mentioned ; of which one is doubtful. But Swartz, from whom this account is copied, seems to have had no very 
distinct idea of the limits between Oncidium and Cymbidium, which were first satisfactorily pointed out by Mr. Brown, 
as several plants referred by him to the latter genus decidedly belong to the former. Mr. Brown has already shown 
that the Cymbidium triquetrum of that botanist is a species of Oncedium ; as M. Kunth has with respect to his Cym- 
bidium pusillum. We have ourselves ascertained, by means of the Banksian herbarium, that the same is the case 
with Cymbidium juncifolium, which, in fact, is very nearly related to Oncidium Cebolleta: and we presume from 
Plumier’s figure, that there can be no reason to doubt that Cymbidium cuneatum is an Oncidium also. 'These addi- 
tions, and the new species published by Kunth, Sims and Meyer, with our O. barbatum, and another new species 
from Mexico, sent to Mr: Lambert by Pavon, will make the number of species now amount to 19 ; or to 20 if the 
Tonopsis of Kunth be a species of Oncidium, as Dr. Meyer supposes. | 
In one portion of them the two anterior divisions of the flower cohere more or less intimately : sometimes forming 
a single piece, but more usually cohering simply at their base ; always, however, more or less concealed by the label- 
lum. In the rest there is no union whatever of this kind ; but as the two groups differ in no other respect, they can 
only be considered sections of the same very natural genus ; which may be thus arranged :— . 
OncIDIUM. 
* Perianthi foliola omnia discreta. 
L.altissimum, Sw.—2. pictum, Kunth ; scarcely distinct from No. 1.—3. Carthaginense, Sw.—4. panduriferum, K. 
_ —5. ornithorhynchum, K.—6. echinatum, K.—7. olivaceum, K.—8. globuliferum, K.—9. emarginatum, Me ope 
10. barbatum, Nobis.—11. Cebolleta, Sw.—12. juncifolium, Nobis (Cymbidium juncifolium, Sw.); folits teretibus subu- 
latis, perianthii laciniis tessellatis acutis undulatis, labelli lobo medio maximo unguiculato emarginato basi appendi- 
culato, columne alis maxtmis apicilaribus. 
** Perianthii foliola 2 anteriora connata. 
13. triquetrum, Br.—l4. iridifolium, K.—15. tetrapetalum, Sw.—l16. bifolium, Stms.—17. variegatum, Sw.— 
18. pauciflorum, Nobis (Epidendrum acinaciforme, Pavon MSS.) ; folits hneari-lanceolatis integerrimis falcatis pe- 
rianthii laciniis obovatis rotundatis undulatis : inferiore minore emarginato, labellk maximi lobo medio unguiculato 
lunato emarginato, columne alis maximis. 7 7 | 
*** Species Dubie. 
19. cuneatum, Nobis (Cymbidium guttatum, Sw.)—20? Tonopsis pulchella, K. 
The only plants of this species in the country exist in the Glasgow Botanic Garden, and in Mr. Cattley’s collection. 
EXPLANATION OF THE PLATE. 
1. Front view of a flower. 2. Back view of the same. 3. Back of the labellum. 4. Cofumna. 5. Front of the same with- 
gue the ancl. 6. The same without the pollen masses; and with the alee of the column spread open. 7. Pollen masses. 
