340 ORCHIDS: 
curiously wavy, and the sepals are keeled behind. The 
lip is large and heart-shaped (whence the specific name), 
with a long, pointed apex; its ground-colour is white, 
blotched with lilac and purplish red, or sometimes with pale 
yellow and crimson. This species blooms during late 
spring and early summer. It is a native of Guatemala and 
Mexico, whence it was introduced in 1837. 
Botanical Magazine, t. 4878, as O. maculatum (the true 
maculatum is a different plant). 
Var. sulphureum.—Sepals and petals sulphur-yellow; lip 
white, with sulphur blotches. 
0. coronarium.—A remarkable plant, one of the most 
attractive when in bloom, but unfortunately rather difficult 
to manage successfully. It has a long, creeping rhizome, 
bearing ovoid, one-leaved pseudo-bulbs, about 2in. apart. 
The leaves are 6in. to roin. long, by about 2in. broad, 
and leathery in texture. Flower-spike 1ft. long, bearing 
many flowers, each 2in. across, full; sepals and petals 
rounded at the apex, crisp-edged, and coloured coppery 
brown, margined with yellow, and with a varnished appear- 
ance; lip broadening towards the apex, bright yellow, with 
a white crest and column. Introduced from New Grenada 
in 1847. The late Mr. Spyers, who grew this plant suc- 
cessfully, recommended that it should be placed on a teak 
raft and planted in peat and sphagnum, and that it should 
be hung near the glass in the cool house and be kept 
very moist all the year round. 
Bateman’s Monograph, t. 27. 
Var. chiriqguense.— Flowers larger and paler; sepals 
chestnut-brown. 
Var. miniatum.— Pseudo-bulbs more crowded on the 
rhizome. Flowers smaller and more numerous on the 
spike. 
