THE FLORA OF THE MALAY· PENINSULA

CXXXVI. ORCHIDEiE. [Thrixspermum.
Lip and petals '75 in. long; lip violet . (8) T. iodochilus
LIp and petals long whIte . (9) T. leucarachne
LIp entIre cuspidate; flowers small (10) T. notabile
(I) T. lilacinum Rchb. fil. Xen. Orch. ii. 121; Rldl. Mat. i. 181.
Sarcochilus lilacinus Griff. Notulce, iii. 334; Ie. Pl. As. t. 320, fig. 2;
Bot. Mag. t. 7754.
Stems 3 to 6 ft. long or more. Leaves amplexicaul ovate
distant, I in. long, '75 in. wide. Peduncles stiff, 4 to 10 in. long;
racemes 3 to 6 in. long; bracts ovate, '25 in. long. Flowers I in.
across, lilac or white. Sepals and petals ovate blunt. Petals
smaller, spreading. Lip shorter, side-lobes falcate acute, midlobe
blunt conic with an oblong callus on disc, base saccate. Capsule
cylindric, 4 in. long, '25 in. thick. Hab. In grassy open swamps,
terrestrial scrambling over bushes. Singapore, Holland Road;
Selitar. Johor, Genuang. Pahang River, Pulau Chengei; Pekan.
Malacca, Ayer Panas (Derry); Chabau. Selangor, Pudu (Goodenough);
Port Swettenham (Williams). Perak, Thaiping; Changkat
Jerin (Wray). Kelantan River near Chaning. Distrib. Borneo,
Java. Natwe name: Rumput Sesudu Paya.
var. montanum Rid!. A fairly stout, much-drawn-up plant with
more distant lance_olate leaves and stouter peduncle with longer
sheathing leaves and sepals and petals rather acute. Hab. Mountains
at 4000 to 5000 ft. altitude, in forest. Pahang, Telom. Perak,
Thaiping Hills near cottage.
Perhaps Blume's ill-described T. amplexicaulzs I have never been able
to find any flowers In a fit state to describe Blume descnbes the lip of
hIS speCIes as muncate
(2) T. calceolus Rchb. fil. Xema, Orch. ii. 122; Ridl. Mat. i. 181.
Sarcochilus calceolus Lmdl. Bot. Reg. 1845, t. 19. S. brachystachys
Hook. fil. F.B.I. vi. 41.
Stems stout, 10 to 12 ft. long or less, slightly flattened. Leaves
lanceolate coriaceous, 2 to 4 in. long, bilobed, sheaths '5 in. long.
Racemes I in. long, one to three together, sessile. Bracts ovate
cucullate, '25 in. long. Flowers 2 in. across, white fragrant;
pedicels and ovary '5 in. long. Sepals broad lanceolate acute
keeled. Petals narrower oblanceolate. Lip shoe-shaped, base
saccate, side-lobes falcate acute, midlobe conic blunt, callus oblong
truncate, retuse at top, all white except orange round callus, and small
orange and crimson dots at base of lip. Capsule cylindric, 6 in. long.
H abo In large clumps on rocks or trees, prostrate. Singapore,
Jurong River; Pulau Tekong. Johor, Tana Runto; Batu Pahat.
Pahang, Kwala Tenok, Tahan River. Negri Sembilan, Gunong
Angsi; Siliau (Williams). Dindings, Telok Sera (Curtis). Panang
Hill (Maingay); Telok Bahang (Curtis). Dzstrtb. Sumatra, Laos.
(3) T. pauciflorum Ridl. Mat. 182. Sarcochilus pauciflorus
Hook. fil. F.B.I. vi. 41.
Stem ',2 in. through. Leaves oblong blunt, 2'3 to 3 in. long,