December 1948 The Queensland Naturalist 11*7 
peduncle winged, ebracteate; spike twice (sometimes three 
times) as long as the peduncle; rhachis rather slender, 
densely-flowered, floral bract minute, elliptic, obtuse, 
coarsely erose, convolute round the sessile ovary. Flowers 
minute (.06in. long), sub-verticillate, pale green or 
yellow. Sepals and petals sub-equal, ovate, rcflexed and 
resting on the ovary, the former entire, the latter erose. 
Lip orbicular, indistinctly 3-lobcd. the side lobes pecti- 
nate. erose, the terminal lobe broad, transversely oblong, 
deeply and bluntly emarginate at the apex and coarsely 
erose. Capsules broadly ovoid, sessile.'' 
The plate accompanying this description shows a 
plant which, even allowing for variations, can scarcely be 
reconciled with that figured bv Fitzgerald. A coloured 
Hate in Bot. Mag. lxxvi.. t. 4517, though sunerficially 
moic like our Australian plant, also differs in important 
details. The distinctions between the two. as they appear 
to me, may be tabulated as follows: 
O. iridifolia Lindl. 
Leaves 15-20 times longer 
than broad, ensiform, very 
acute. 
Peduncle flattened and 
winged, without any bracts. 
Flowering spike twice or 
three times as long as the 
peduncle 
F'loral bract elliptic, ob- 
tuse, coarsely erose, con- 
volute round the sessile 
ovary. 
Sepals and petals sub- 
equal, the former entire, 
rhe latter erose. 
Labellutn orbicular, indis- 
tinctly 3-lobed; lateral lobes 
pectinate, erose, mid-lobe 
broader than long, coarsely 
erose, conspicuously and 
deenly bifid at the apex. 
Capsules broadly ovoid, 
sessile. 
O. muelletiana Schltr. 
Leaves 6-10 times longer 
than broad, linear-oblong, 
obtuse or very shortly 
acute. 
Peduncle flattened and 
winged, with 1 or 2 scarious 
bracts. 
Flowering spike rarely 
twice as long as the pedun- 
cle, and often shorter. 
Floral bract ovate, den- 
ticulate or sometimes near- 
ly entire, not convolute 
round the ovary, which is 
def'nitel.v pedicellate. 
Dorsal sepal nearly twice 
as large as the laterals, 
which are short, and very 
broad. Petals as long as, 
or even longer than, the 
dorsal sepal, but narrower. 
A I I perianth segments 
slightly and coarsely erose 
or undulate. 
Labellum almost broadly 
triangular, not perceptibly 
lobed, not deeply bifid at 
the apex, margins erose. 
Capsules rather narrowly 
ovoid, very conspicuously 
ribbed, pedicellate. 
