ODONTOGLOS'SUM ROS'SII 
ROSS’S ODONTOGLOSSU3I. 
ENDOQEK^. 
OR 
MONOCOTYLEDON E /B. 
GYNANDKOSiE, 
OF 
LIND LEY. 
NATURAL ORDER, ORCl 
1 
Natural division 
to which 
this Plant belongs. 
Artificial divisioni 
to which 
this Plant belongs 
GYNANDRIA, 
MONANDRIA, 
OF LINNEUS. 
No. 222. 
GENUS. Odontoglossum. Humb. et Kunth. Perigonii explanati 
foliola angusta, acuminata, libera, exteriora et interiora aequalia. Labellum 
unguiculatum, cum columnae basi continuum ecalcaratum, indivisum, lamina, 
patente basi cristata. Columna erecta, membranaceo marginata, apice utrin- 
que alata. Anthera bilocularis. Poi.linia 2-solida, caudicula lineari, glan- 
dula hamata. Herb^ Americanae, tropiacse, epiphytae, pseudobulbiferae; foliis 
plicatis,scapo terminali vaginato, floribus speciosis. Enlicher • genera, 203. 
SPECIES. OnoNTOGLOssuAi Rossii {Lindley) pseudobulbis ovatis congestis 
subcompressis ancipitibus mono- vel duopliyllis; foliis oblongo-lanceolatis; 
scapo radicali bi- vel triflora folio longiori; bracteis membranaceis carinatis 
acuminatis, sepalis lanceolatis carinatis acuminatis vel acutis: petalis oblongis 
revolutis: labello sub-rotundo-ovato emarginato undulato lamellis unguis con- 
fluentibus rotundatis denticulis, 2 columna aptera pubescente. 
Character of the Genus, Odontoglossuai. Perigonium ex- 
plauate; leaflets narrow, acuminate, free, exterior and interior equal. 
Labellum clawed, continuous with the base of the column, spurless, 
undivided, lamina patent, crested at the base. Column erect, with a 
membranaceous margin winged on each side. Anthers two-celled. 
Pollen masses two, solid. Caudicula linear. Gland hooked. 
Description of the Species, Odontoglossum rossii. Epi¬ 
phyte, Plant from 6 to 8 inches in height. Pseudobulbs about an 
inch high, somewhat compressed, two-edged. Sheaths brown, sca- 
rious, longer than the pseudo-bulbs. Leaves sometimes solitary, 
sometimes in twos, lanceolate, striated, acute, erect or revolute, from 
three to six inches long and about an inch wide. Scape erect, about 
six inches high, producing from two to three flowers. Peduncles 
from two to three inches long. Bracts solitary, brown, varying in 
length from two to ten lines. Flowers about two inches in diameter. 
Sepals patent, or incurved, lanceolate-acute, of a greenish brown 
colour, in the inside beautifully banded with brown, on the outside 
spotted with the same colour. Petals white, ovate, lanceolate, obtuse, 
longer than the sepals, revolute, margin irregular, sometimes spotted 
at the base with brown, sometimes blotched with brown. Labellum 
