PLATE X X I .
O D O N T O G L O S S U M H A L L I I.
C O L O N E L H A L L ' S O D O N T O G L O S S U M .
O. (EUODONTOGLOSSUM, Lindl.) pseudobulbis ovatis, ancipitibus 1-2-phyllis, foliis ensiformibus
in basin angustatis, racemo multifloro (raro sub-paniculato), sepalis petalisque ovatolanceolatis
unguiculatis labello oblongo acuininato lacero, crista baseos lamellata multifida,
column® alis dente superiore aristato.
ODONTOOLOSSBM 1IALI.II, Lindl. in Bot. Beg. sub I. 1992, el Mia Orchid.; Beichcnbaeh fd. Xenia, i. 63 ; Watpers Annates, vi. p. 828.
Habitat in PERU (western declivity of Picliinclia), ffartwey; Valley of LLOA, at elevation of 8000 ft., Cot. Halt; N. GRENADA in
forests of Pamplona, 8500 ft.. Linden.
DESCRIPTION.
PSEUDOBTJLBS ovate, 2 to 4 inches long, compressed, 2-edged, bearing generally one, occasionally two, lanceolate
LEAVES, a foot or more long. RACEME many (10-20) flowered, occasionally though rarely branched, 2 to
3 feet long. SEPALS and PETALS nearly equal, ovate-lanceolate, exceedingly unguiculale, from an inch to
(in some varieties) an inch and a half or even 2 inches long, yellow with large, often very dark, blotches of
purplish-brown. LIP white, with a few rich spots, oblong-acuminate, jagged at the edges, with a large and
handsome yellow CHEST, coTisisting of a multitude of flattened but sharp-pointed teeth, poititing sideways and
downwards. COLUMN white, winged, the wings broken into teeth o-r cirrhi, of which the. uppermost is
much the largest.
This fine Odontoglossum was one of the earliest known though one of the latest to reach us alive. It is
now (1873) plentiful enough, and forms a most attractive object in our spring Orchid-shows. There are many
varieties differing greatly in the size and marking of their flowers, but all maintaining the unguiculate sepals
and petals which chiefly distinguish it from O. luteo-purpureum (PI. 17), to which it is indeed very nearly allied.
O. Ilallii is abundant in New Grenada and Peru, but is seldom met with at a lower elevation than 8000 feet,
hcnce it is quite at home in the coolest part of the " cool Orchid-house," in which it grows aud flowers very
freely indeed.
In the woodcut, a solitary flower of a larger variety of the specics is represented, natural size.