20 ORCHIDS OF THE SIKKIM-HIMALAYA. 
column, and the other connecting the two lateral lobes of the apex; whereas none of 
the other species have апу calli on the lip. The flowers in the Sikkim specimens of this 
are all red or occasionally yellow; but, in other provinces, they vary to  yellowish- 
green and purplish. ‘The under-surfaces of the leaves and the rachis are in Sikkim 
suffused with purple. 
Prate 23 — Mierostylis congesta, Roiehb. fil. Inflorescence and leaf, of natural size. Fig.-1 а 
flower, front view, 2 stalked ovary, column and lip, i» profile, З lip 4 column and upper part of 
ovary, 5 anther, 6 pollinia; all enlarged. In the corner is a much reduced figure of an entire plant. 
7. MICROSTYLIS CYLINDROSTACHYA, Keichb. fil. in Walp. Ann, VI, 207. 
Stem proceeding from the base of the sinall conical tuber of a former year, 1:5 
to 6 in. long to the base of the leaf, and bearing one or two tubular wide-mouthed 
sheaths. Leaf solitary, elliptic, sub-acute, passing at the base into the long tubular 
petiole; blade 15 to 4 in. long and °75 to 1°75 in. broad, Inflorescence 32'to 10 in. 
long, the peduncle long, ebracteate, the raceme cylindric with numerous crowded small 
yellowish-green flowers about :15 in. long. Floral bract lanceolate, shorter than the 
ovary. Sepals sub-equal, ovate, acuminate.  Peía's linear-lanceolate, acute. Zp- fleshy, 
broadly ovate, excavated, the margins thickened, angled and denticulate at the base 
so as to appear lobed, the apex produced into a fleshy point; the upper surface having 
a raised line running along its centre from apex to base, and two convexities immediately 
under the column. Pollinia sub-obovoid, divergent, their points exserted over the corners 
of the stigma, Ridley in Journ Linn. Soc. XXIV, 333; Hook. fil, Fl. Br. Ind. V, 659. 
Dienia cylindrostachya, Lindl. in Wall. Cat. 1934; Gen. and Spec. Orchid, 22; Wight 
Іс, 1630. 
Sikkim ; the Lachen Valley, alt. about 12,000 feet; Pantling No. 379. Choombi 
(in Bhotan); King's Collector Nos. 409, 4709; flowering in July. Also in the North- 
West Himalaya from Simla to Nepal, but at slightly lower elevations, 
Prate 24.— Microstylis cylindrostachya, Reichb. fil. A plant, of natural size. Fig. 1 flower, front 
view, 2 view in profile of bract, subsessile ovary, column and lip, 3 front view of column, the pollinia 
being absent, 4 an empty anther, 5 pollinia, 6 a pollen mass, in profile; all enlarged. 
8. MiucmosrYLIS muscirera, Ridley in Journ. Linn. Soc. XXIV, 333, 
Stem from the apex of a small ovoid pseudo-bulb, 1 to 5 in. long; and = 
at least one tubular sheath, Leaves usually two, rather close together, unequal, ovate- 
rotund to ovate-lanceolate, sessile or petiolate, obtuse or sub-acute; somewhat narrowed at 
the base to the sheathing petiole; length of blade 1 to 2:5 in., breadth 1 to 1°5 in. 
drflorescence 3 to 10 in. long; the peduncles terete, PESE ; raceme rather lax. 
Flowers yellowish-green, “15 in. long; floral bract shorter than or equal to the pedi- 
celled ovary. Sepals sub-equal, broadly oblong-lanceolate, sub-acute, longer than the | 
linear petals. Lip broadly ovate, fleshy and excavated at the base, the basal part with 
obscure thickened convex side-lobes. Column very short, fleshy. Hook. fil. Fl, Br. Ind. 
V, 689. Dienia muscifera, Lindl. in Wall. Cat. 1935; Gen. and Spec. Orchid, 23. 
In the Lachen Valley in Sikkim; Pantiing No. 395, common, _ Temperate ишш, 
alt. 8 000 to 11,000 feet, eastwards o Кайын; 
