86 otemt, ORCHIDER. (J. D. Hooker.) [ Thelasis. 
base of the column, erect, ovate or oblong. Column very short, sessile, 
foot 0; rostellum terminal, large, erect; anther elongate, dorsal, erect, base 
2-4 celled ; pollinia very minute, globose, attached by long threads to the 
tip of the rostellum, gland small. Capsule very small, turgidly ovoid. 
— Species about 10, tropical Asiatic and Pacific. 
Iam not wellsatisfied as to the character of lateral sepals in this genus, as to 
their being winged or not; the sepals are very soft, and their exact structure not very 
clear in specimens that have been dried, and again moistened. 
Sect. I. EuTHELAsts. Pseudobulbs 1-2-leaved. 
* Lateral sepals distinctly strongly keeled or winged. 
1. T. pygemeea, Lindl. in Journ. Linn, Soc. ii. 63; scape 1-2 in. 
longer than the solitary linear leaf, spike very short lax-fid., lip ovate 
acute contracted towards the tip. Par. § Reichb. f. in Trans. Linn. Soc. 
xxx. 145; Walp. Ann. vi. 923; Euproboscis pygmæa Griff. in Cale. Journ. 
Nat. Hist. v. 371, t. 72; Wight Ic. t. 1732. 
Nepat (Cult. in.Hort. Bot. Calc. fid. Griffith.) MALABAR, Jerdan. TENASSERIM, 
at Moulmein, Parish. 
Pseudobulbs 3-2 in. diam. Scape very slender, curved ; spikes 4—} in. long ; bracts 
ovate, acuminate; flowers 51, in. long; dorsal sepal ovate-lanceolate acute, lateral 
linear-oblong; lip 3-nerved, with rounded sides from the middle to the base ; rostellum 
2-fid.—The Malabar plant seems the same as the Tenasserim, but is in a Peloria 
state, triandrous, with the petals and lip similar, ovate-lanceolate, l-nerved ; ovary 
with imperfect ovules. 
Var. multiflora; leaf larger 3-4 by 3 in., scape stouter 4-5 in., spike 14-2 in. 
—Sikkim Himalaya, alt. 1000 ft., Treutler. 
2. T. ? capitata, Blume Bijdr. 386; scape 4-6 in. stout longer 
than the solitary linear leaf, spike cylindric dense-fld., rachis pitted, lip 
oblong-ovate obtuse. 
PERAK, Scortechini,.—D1sTRIB. Sumatra, Java. 
Pseudobulbs small, oblong, on a stout creeping rhizome. Leaf 3-4 in., obtuse or 
subacute. Spike 1 in.; bracts very close set, ovate, acute, recurved; flowers Ae ™ 
long ; dorsal sepal ovate-lanceolate, lateral oblong concave thickly keeled or shortly 
winged; petals lanceolate, acuminate; rostellum elongate, subulate, entire.— 
Differs from the Sumatran capitata in the long spike, acuminate petals and entire 
rostellum. It more resembles the raceme of P. triptera, R.f. of Manilla, which has an 
ovate lip narrowed to the apex. ` 
3. T. elongata, Blume Orchid. Archip. Ind. 23, t. 7, f. 9, and t. 5, fig 
C; scape 4-6 in. longer or shorter than the solitary linear leaf, spike 
cylindric dense-fld., lip ovate acute or acuminate. 
SINGAFORE ; at Johore, &c., Ridley. LANGKAWI, Curtis. 
Pseudobulb very various in form. Leaves and spike as in T. capitata, from 
which it differs in the form of the lip. Blume’s figure is a very bad one, and does not 
show the strong keels on the lateral sepals and angles of the ovary.— The species 0 
this section are very difficult of discrimination in a dried state, and possibly capitata, 
elongata, triptera aud others are all forms of one. 
** Lateral sepals not strongly keeled or winged. 
e . 
4. T. bifolia, Hook. f. Ic. Plant. ined.; scape 8 in. much longer than 
the two opposite elliptic-lanceolate acuminate leaves, spike very lax-fld., 
lip broadly elliptic obtuse. 
