CXXXVI. ORCHIDEjE. 
Appendicula.] 
199 
acute, laterals very oblique acuminate, mentum long. Petals 
lanceolate broader. Lip base oblong, limb broad, orbicular bilobed. 
Column short, arms round, foot long. Anther ovate acuminate 
crimson. Pollinia 4, connate with a caudicle, disc oblong. Hab. 
Selangor, Rawang; Batu Caves; Ulu Gombak. Perak, Thaiping 
Hills (Ridley). 
78 . THELASIS, Bl. 
Epiphytes with sub-globose pseudobulbs or none, rhizomatous. 
Leaves x or 2 ligulate blunt. Scape from base of pseudobulb race¬ 
mose or spicate above. Flowers small or very small, greenish 
yellow or fawn colour; perianth connivent. Sepals and petals 
lanceolate. Lip ovate-lanceolate entire, no callus. Column short. 
Rostellum long, bifid. Anther lanceolate. Pollinia 4 to 6 globose 
on a slender caudicle. Capsule small fusiform. Species 20 or more, 
Indo-Malaya. 
§ 1. Eu-thelasis. Pseudobulbs ovoid swollen with 1 or 2 leaves. 
Racemes short, dense; pseudobulbs small 
crowded . . . . . . . (1) T. elongata 
Racemes short dense; pseudobulbs small distant 
on a stout rhizome . , . . . (2) T. capitata 
Raceme long lax; pseudobulbs large . , . (3) T. macrobulbon 
§ 2. Oxyanthera. No pseudobulbs; leaves distichous articulate on a sheath. 
Raceme long straight ; flowers many distant . (4) T. carinata 
Raceme short decurved with few crowded flowers (5) T. decurva 
(1) T. elongata Bl. Orch. Arch. Ind. 23, t. 7, fig. 2; Ridl. 
Mat. i. 
Pseudobulbs ovoid depressed, -5 in. long. Leaf ligulate, base 
narrowed, 1-5 to 3 in. long, *25 to *5 in. wide. Scape 3 to 6 in. long, 
racemose part *5 to 3 in. long, covered with persistent ovate acumi¬ 
nate reflexed bracts. Flowers *12 in. long, greenish yellow. Sepals 
oblong acute. Petals spathulate smaller. Lip ovate-lanceolate. 
Hab. Mangroves and other trees. Common generally near the sea. 
Singapore, Kranji. Johor, Ulu Batu Pahat (Kelsall). Pahang, 
Pekan. Perak (Scortechini). Naungchik, Bukit Besar (Annandale). 
Distrib. Malay isles, Hongkong. 
(2) T. capitata Bl. Bijdr. 386; Orch. Arch. Ind. 20, t. 7, fig. 1; 
Ridl. Mat. i. 199. 
Rhizome very stout; pseudobulbs ovoid globose, nearly 1 in. 
apart. Leaf 4 in. long, *5 in. wide, lorate. Scape rather stout, 
6 in. long, with a sheath -25 in. long in middle; raceme 1 in. long. 
Sepals lanceolate. Petals lanceolate blunt. Lip concave. Hab. 
In dense forests. Pahang Tahan woods, Selangor, Batu Caves. 
Perak (Scortechini). Distrib. Java. 
Perhaps merely a jungle form of T. elongata Bl. 
(3) T. macrobulbon Ridl. Journ. Linn. Soc. xxxii. 393; Mat. i. 
*99 • 
Pseudobulbs close-set of 2 internodes flask-shaped, lower inter- 
1°* 
