158 ORCHIDS OF THE SIKKIM-HIMALAYA. 
this bending proceeds (as is shown in Plate 216, fig. 5) until it forms а complete fold, the 
convexity of which is directed forwards. In I. paleacea the bending is much less complete, the caudicle 
making only a slight sigmoid curve (as is seen in Plate 215, fig. 6). These arrangements resemble those 
which obtain in Vandeae rather than in Epidendreae. The resemblance to Vandeae in structure is, however, 
still greater in Јоле intermèdia. In that species the caudicles are similar in shape to those in the two 
species just referred to, except in not being free at the lower end. The rostellum, however, is very 
different; for, instead of consisting of two distinct elongated processes, it consists of a ‘single broad 
curta:n-like mass of tissue (Plate 218, fig. 2), projecting continuously along the whole upper margin of 
the stigma, and having in the middle a reniform diso of viscid substance, to which disc the ends of the 
caudicles are firmly attached. On removing this viscid disc, both caudicles, with their attached pollinia, 
come away together. ‘There is, however, very little movement after removal; for the pollinia fall forward 
only very slightly and the caudicles scarcely bend at all. On account of the structural peculiarities 
above set forth, we consider that the genus Zone forms а link between the tribes Epidendreae and 
Vandeae, having the general appearanee and habit of several genera of the former, combined with the 
pollinia of the latter; and this opinion receives considerable support from the functional phenomena 
just described, We have therefore ventured to dissociate the genus Толе from Bulbophyllum and its 
neighbourhood, and to place it in Vandeae, Other reasons for the separation of Jone from. Bulbophyllum 
are to be found in its large and immobile lip, which is firmly attached by its broad base to the short 
foot of the column, the lip of Bulbophyllum being characterised by its comparatively small size, and by 
its mobility. The foot of the column also is usually rather elongate in Bulbophyllum, while in [оле it 
is very short. To this genus we have reduced Swnipia, as careful dissections of fresh flowers show that 
the structure of the flowers is practically the same as that of Jone. E 
Since the above was written, we have discovered the new species described below under the name of 
1. Andersoni. In this species, each of the caudicles ends in a most distinct viscid stigmatie gland. Since 
this discovery we have no hesitation in removing the genus Jone to the tribe Vandeae. 
Caudicles without glands— - 
Flowers about 1 in. long, in elongate secund racemes . . . . . . . 1 
Flowers *4 in. long, in distichous short racemes . . . . . . . . . 2 
Caudicles attached to two glands... . 
Caudicles attached to a single gland— 
Pedicel nct longer than the pseudo-bulb and with only 1- or 2-flowers . 4. 
Seapes longer than the leaves, many-flowered . Moa a . 
Т. paleacea. 
I. bicolor. 
ect o 9 v о v, Б. 4. ДИЧО. 
I. intermedia. 
. & І, scariosa. 
1. IONE РАгЕАСЕ А, Lindl. Fol. Orchid. 9. 
Rhizome *2 in. thick, naked; pseudo-bulbs about 1 in. short, ovoid or obpyriform 
slightly wrinkled, 1:25 to 14 in long. Leaf narrowly oblong, the apex blunt Es 
retuse, much narrowed to the base, sessile, 4 to 8 in. long, and °75 to 1°15 in. icd 
$саре much longer than the leaf; the pedicel with two or three she 
raceme shorter than the peduncle, secund, sparsely-flowered. 
drooping ; floral bract scarious, broadly lanceolate, convolute, 
the long-pedicelled ovary. Sepals sub-equal, lanceolate-oblong, acuminate, the dorsal 
slightly shorter than the connate lateral pair, all transparent, with pink nilicalbitons 
Petals spreading, much smaller than the sepals, broadly oblong, blunt бед 
1- to 3-nerved, similarly coloured to the sepals. x ; | 
Lip dark purple, nearly as lo 
аз the sepals, oblong-lanceolate, the base thickened and connate with the 9 d 
foot of the column, not jointed, tapering to the sub-acute apex; upper surface with 
а cancellated two-chambered. callosity in the middle, thickest near the base and passing 
towards the somewhat convex apex into a grooved ridge, the edges entire or crenate. 
Column short, the rostellum consisting of two deflexed subulate processes; the foot at 
right angles to the column, very short. Anther sessile on the column; pollinia 4, elliptic, 
athing bracts; 
Flowers 79 to 1'1 in. long, 
as long as or longer than 
