CLEISOSTOMA. 231 
Mouth of spur occluded by two calli and by a semi-circular erose scale 
on the column; leaves broad, obtuse and obliquely bifid at the apex. 4. C. Wendlandorum, 
Spur with rather thin calli, its mouth closed by a scale from the 7 
posterior wall. . . , 2. 9. С. bambusarum, 
Posterior callus of spur d ыға; odd ог Е съ попе. 
Apical lobe of lip pos convex, its pp erose; spur wide, 
saecate, blunt . . . 5 6. С. micranthum, 
Apical lobe of xd concave, dts E iilis: ; spur ому 
cylindric . . 527% А (ыла а 5% 5-3 Ta ee OP ANOR. 
1. CLEISOSTOMA ARMIGERUM, King and Pantling in Journ. Ав. Soc., Bengal, 
Vol. LXV, pt. 2, p. 123. 
Stems erect, rigid, 2 to 4 іп, long. Leaves very fleshy, semi-terete, channelled 
in front, the apex sub-spinous, not narrowed at the sheathing wrinkled base.  Racemes 
extra-axillary, “5 in. long. Flowers crowded, “95 in. across. Sepals spreading, ovate- 
rotund, apiculate. Petals much smaller, also spreading, oblanceolate. Lip with a wide 
sacciform spur half as long as and parallel to the ovary, its edges with broad shallow 
triangular side lobes; apical lobe ovate, blunt, concave; the interior of the spur with 
opposing thick calli from the posterior and anterior walls, the latter much the larger 
and occluding the passage; the dorsal callus curved and dilated upwards, its upper 
surface produced into two broad scale-like teeth pointing outwards, Column short, 
adherent for half its Jength to the lip. Anther depressed; rostellum beaked; pollinia 
two, globose, bifid; caudicle stout, thickened at its junction with the pollinia; gland 
with two ovoid lobes with decurved margins. 
Sikkim, at low elevations, common; in flower during September; Pantling No, 252. 
The flowers are pale straw-coloured, flushed with pink. A coloured drawing of this 
has been in the Calcutta Herbarium since 1856, but until recently there have been no 
specimens, the original from which that drawing was made having been lost. 
PLATE 908.— С/сізсгіста armigerum, King and Pantling. А plant. Fig. 2 transverse section of а 
leaf, of natural size. Fig. 1 a flower, З side view of floral bract, ovary, column, anther in situ and lip, 
4 transverse section of spur below the calli, 5 the posterior callus inside the spur, 0 longitudinal section 
of the ovary column and spur, 7 under surface of anther, 8 pollinia— side and back views; ай enlarged, 
9. . CLEISOSTOMA BREVIPES, Hook. fil Fl. Br. Ind. VI, 73. 
Stems about ав thick as а goose-quill branching, pendulous, 8 to 16 in. long. 
Leaves thickly coriaceous, wrinkled, narrowly oblong-lanceolate, acute, not narrowed at 
the sheathing base; length 2:5 to 95 in., breadth 4 to :5 in. Spikes extra-axillary, 
much shorter fhan the leaves, pendulous, the rachis very stout, the pedicel short. 
Flowers crowded, `4 in. in diam. vertically; floral bract broad, sub-acute, short. Sepals 
sub-equal, broadly ovate-elliptic, sub-acute, the dorsal somewhat concave. Petals oblance- 
olate, blunt, shorter than the sepals. Гір longer than the sepals, the base forming a 
short wide sac almost at right angles to the ovary, its mouth with triangular falcate 
side lobes; apical lobe fleshy, elongate, triangular-hastate with a narrow aristately bifid 
decurved apex. Column stout, with a large bifid callus at its base, hispid on the 
` anterior surface and projecting into the spur to meet the thick callus on the anterior 
wall, and thus closing the orifice of the sac; dorsal scale none. Anther depressed, | 
