LISTEREAE. | 251 
position of the anther at first glance appears to be erect, but a minuter examination shows that the 
pollinia and their caudicle lie horizontally on the broad truncate apex of the ‘column. On the edge 
of this truncate apex stands the bifid erect rostellum, and in its cleft lies the gland to which the 
horizontal caudicle attaches itself. The genus is allied to Thelasis and, as Sir Joseph. Hooker remarks 
F Ic. Plant. sub t. 2155, the texture of the petals in both genera is of the same soft, lax, succulent 
ure. 
PHREATIA ELEGANS, Lindl. Gen. and Spec. Orch., 63. 
Pseudo-bulbs tufted, ovoid, compressed, *75 in. long. Leaves thiekly membranous, 
narrowly elliptic, sub-acute or acute, somewhat narrowed to the large tubular sheath, 
4 to 6 in. long and about *75 in. broad. Scape erect, much longer than the leaves, 
proceeding from the base of а pseudo-bulb bearing about three distant convolute sheaths 
half an inch long; the raceme about 4 in. long, densely-flowered, the flowers opening 
from above downwards or sometimes from the centre towards the base and apex. 
Flowers minute (only *125 in. across) white; the dract lanceolate, equalling or somewhat 
longer than the sessile ovary. Sepals sub-equal, ovate, acute, spreading; the petals 
narrower. Lip oblong, entire, sessile on the narrow foot of the column, deflexed about 
the middle, its upper surface hispid or smooth, grooved down the midrib. Rostellum 
bifid, erect; pollinia sub-rotund, cohering to a single thin caudicle; the gland long, 
narrow. Lindl. in Journ. Linn. бос. III, 61; Hook. fil. Fl..Br. Ind. V, 811. Thelasis 
elegans, Blume Mus. Bot. Lugd. Bat. II, 187. 
Sikkim, at Choongthang; elevation 6,000 feet; in flower in August; Pantling 
No. 295. Khasia Hills; ©. Mann, King’s Collectors. 
PLATE 333.—Phreatia elegans, Lindl. A plant, of natural sise. Fig. 1 a flower, front view, 2 lip, 
3 column with anther in situ, showing polliniar gland (pg) and stigma (s), 4 front view of the same, the 
anther having been removed to show better the forked rostellum (r), 5 floral bract, ovary, column and 
its foot, anther and lip, side vicw, 6 lower surface of anther, 7 pollinia; «й enlarged. 
Tribe IV.-—LISTEREAE. 
Але” terminal (dorsal in Epipactis), pollinia two or four, cohering by their sides, 
without gland or caudicle (a rudimentary caudicle in Epipogum); pollen powdery, granular 
or in small masses, never waxy. 
Anther truly terminal. 
Pollinia with small thin eaudicles but no gland, lip spurred . . . . 65. Epipogwm. 
Pollinia without caudicles. 
Lip flat, neither clawed spurred nor saccate, pendulous and usually 
at right angles with the curved, more or less elongate, always 
inappendiculate, column; sepals and petals free, eee or 
reflexed ; leaves two (absent in one species). + + - . 
Lip not pendulous, transversely elliptic, neither clawed سا‎ 
nor saccate ; its upper surface somewhat concave and with two 
elongated tooth-like calli near its base; column with a short 
transverse horizontal sub-truncate process near its — and 
at its base a sub-erect tongue-like 2-lobed process. . . 67. Pantlingia, 
66. Listera. 
Ann, Roy. Bor. Gard., Carcvrra, Vor. VIII. 
