IONE. 157 
Rirata HIMALAICA, King and Pantling. 
Siem pendulous, sub-dichotomously branched, clothed throughout with imbricate scarious 
strongly-nerved sheaths; the branches short, each bearing a single terminal peduncle. 
and a solitary leaf. Leaf fleshy, linear-oblong, jointed to the axis, its apex obliquely 
notched and acute, its base tapering to the short petiole; length 2:5 to 4 in., breadth 
about °З in. Peduncle from the axis at the side of the base of a leaf, sheathed by two 
bracts and with two small opposite scarious sub-rotund bracteoles at its base, 1-flowered 
or occasionally 2-flowered. lowers ‘25 іп. long., pale yellow, pubescent externally ; 
the floral bract ovate, acute, sheathing, rather longer than the sessile ovary. Dorsal 
sepal ovate-lanceolate, concave, sub-acute; the lateral pair broader, abruptly and bluntly 
acuminate, incurved. Petals about as long as the sepals, spreading, linear, acute. 
Lip fleshy, not lobed, its lower part attached tothe inner half of the column and to 
its foot to form a short wide sac with a septate pubescent mouth; the anterior part 
of the lip thick, fleshy, convex, sub-orbicular, notched at the apex. Column very short 
with a short foot. Stigma broad and flat. Anther 4-celled, terminal. Pollinia 8, clavate, 
unequal, connected by granular threads to a small oblong gland, Cerdtustylis himalaica, 
Hook. fil. Ic. Plant, t. 2101; Fl. Br. Ind. V, 826. 
Sikkim, at Tendong, elevation 5,000 feet; in flower during May and June; Pantling, 
No. 149. 
Puare 211.— Rilaía himalaica, King and Газ по. A plant; of natural size, Fig. 1 pedicel with 
its basal bracts, floral bract, ovary and flower, side view, 2 flower, front view, 3 half profile view of 
column, lip and sao, the sepals and petals having been cut off, 4 view from above of the clinandrium 
(c), the anther having been removed, septate mouth of spur and lip, 5 empty anther, 6 pollinia ; 
ail enlarged. 
30. Ione, Lindi. 
Epiphytal; pseudo-bulbs from a creeping rhizome, 1-leaved. Scape from the base 
of a pseudo-bulb. Flowers elongate, solitary, in pairs, or in secund or distichous 
racemes. Sepals membranous; the lateral pair more or less coherent under the lip by 
their inner edges. Petals smaller than the sepals, spreading. Zip attached to the foot 
of the column by a broad base, entire, not mobile, equalling or exceeding the ‘sepals 
in length, fleshy in the centre and produced at the apex into a tongue-like point, 
sometimes not fleshy and sometimes with an emarginate apex. Column short, with no 
foot or with a short one; the rostellum formed by two undivided broad and deflexed 
elongate processes. Pollinis 4, equal in size, ellipsoid, attached by pairs to two elongated 
elastic caudicles, without or with a gland or glands. About eight species; natives of 
the mountains of India and Ceylon. 
Тһе form and functions of the rostellum and of the caudicles of the pollinia in this genus 
ean be understood on'y by examination of fresh flowers. In J. paleacea and J. bicolor the rostellum 
consists of two long narrow downward-pointing processes. The four pollinia are of the same size 
and shape, and they lie in а horizontal row, all being equally exposed. They are attached 
by pairs to two elongated tapering enaudieles of tough clastic tissue which rather exceed the rostellar 
processes in length. The caudicles lie on the upper surfaces of the rostellar processes, but, being 
longer, their ends, which are quite free, project beyond the extremities of the former. Each of these 
free ends is provided on its lower surface with a little mass of viscid adhesive substance. When one of 
these caudicles is removed by allowing its viscid end to adhere to a thin rod of wood, the two pollinia 
at its apex are soon seen to fall slowly forward, owing to the bending of the caudicle. In I. bicolor 
