388 ORCHIDS. 
The flowers are produced in spring. Introduced from 
Brazil in 1849. Syn. O. Righyanum. 
Warner’s Select Orchids, i., t. 23. 
O. serratum.—A very handsome, large-flowered species, 
remarkable for its long, twining flower-spike. Pseudo- 
bulbs flask-shaped, from 4in. to 6in. long, partly inclosed 
in sheathing leaves till old. Leaves broad, leathery, rft. 
or more in length, 2in. broad, arched, bright green. Flower- 
scape from 6ft. to 12ft. long, branched, twining, many- 
flowered; flowers 31n. across; upper sepal reniform, rdin. 
broad, wavy and crisped; lower sepals 2in. long by }in. 
wide, curved, crisped and wavy; petals oblong, over rin. 
long, wavy, curled in till they almost meet over the 
column; lip small, fleshy, hastate, with a crest of five 
prominent ridges. The colour of the whole flower is 
bright cinnamon-brown, with the upper half of the petals 
and the edges of the sepals yellow. This species blossoms 
in winter. It should be planted in a roomy, well-drained 
pot, in a mixture of turfy peat and sphagnum, and be 
grown in the cool house. A native of Peru; introduced 
in 1850. 
Fig. 94; Botanical Magazine, t. 5632. 
The following species are very similar to the above in 
habit and form of flowers, viz.: 
0. cryptocopis.—Flowers reddish brown, margined with 
yellow ; lip small, reniform, recurved. 
0. falcipetalum.— Flowers very large, brown; scape 
2oft. long. 
0. hastiferum.—Flowers reddish brown; upper sepal 
ovate. 
0. ludens.—Sepals brown and yellow; petals yellow, 
marbled with cinnamon; lip ochre-yellow with a mauve 
crest. 
