DENDROBIUM. 53 
20. DENDROBIUM HETEROCARPUM, Wall. in Lindl. Gen. and Spec. Orchid., 78. 
Stems erect, as thick as а goose-quill at the base but much thicker ('5 in.) 
upwards, ribbed, sheathed, 9 to 18 in. long. Leaves narrowly elliptic-oblong, sub- 
acute; length 3 to 5 іп, breadth *5 to 1 in. Flowers 2 to 95 in. across, solitary, 
or two ог three on a very short peduncle from the leafless stems; /ога1 bract 
broad, obtuse, convolute, much shorter than the stalked ovary. Sepals subequal, the 
dorsal linear-oblong, sub-acute; the lateral pair lanceolate. Petals as long as the dorsal 
sepal, broadly lanceolate. Zip longer than the lateral sepals, trowel-shaped, acute, 
decurved, the edges undulate, the sides of the base somewhat convolute, the disc 
papillose-pubescent. Column very short, broad above the foot, tapering, excavated and 
with a raised line down the centre. Mentum short, conical, obtuse. Axther convex, 
grooved on the upper surface, its edge erose, the inner pollinia very narrow. Wall. 
Pl. As. Rar. II, 84, t. 196; Lindl, in Bot. Reg. 1844, Misc. 49; Bot. Mag., t. 4708 
and 4978 (var. Henshallii); Fl. des Serres VIII, t. 842; Gard. Chron. 1885, I, 472, 
fig. 84 B; Hook. fil. Fl. Br. Ind. V, 737. D. aureum, Lindl, Gen. and Spec. Orchid, 
77; in Bot. Reg. 1839, t. 20 (var. pallida); Wight Ic., t. 1646; Veitch Man. Dendrob. 
19 with jig.; Reichb. fil. in Gard. Chron. 1880, 72 (var. Philippinensis); Reichenbachia 
IL, t. 63. D. rhombeum, Lindl. in Bot. Reg. 1843, t. 17. Dendrobium sp. Griff. Notul. 
III, 304; Ic. Pl. Asiat., +, 306. 
Sikkim; in tropical valleys up to 3,500 feet; in flower during April; Pantling 
No. 200. The Himalaya westwards to Nepal; Assam, the Khasia Hills, Upper Burmah; 
also in the hill ranges of Southern India and in Ceylon. Distribution; Java and the. 
Philippine Islands. | 
'The prevailing colour in the flower is white or pale ochraceous, often tinged with 
green; the lip being either yellow or white, with a yellow disc and many red or 
purple radiating lines. The flowers are faintly fragrant, 
PLATE 74.— Dendrobium heterocarpum, Wall. A plant in flower and one in fruit. Fig. 1 а floral 
bract flattened out and a leaf, 2 sepals and petals; ай of natural size; 3 column and its foot 
and mentum, showing the vertical rib down the excavated centre of the latter, 4 anther, 5 pollinia, 
6 an inner pollinium; a4 enlarged. 
21. DENDROBIUM CLAVATUM, Wall. Cat. 2004. 
Stems somewhat thicker than a swan’s quill, scarcely clavate, the leafy stems 
smooth, the leafless vertically ridged, 18 to 30 in. long. Leaves coriaceous, narrowly 
oblong, the apex blunt ог sub-acute, very slightly notched; length 3:5 to 5 in., breadth 
"8 to 1:5 in. Inflorescence from the leafless stems of the previous year; the peduncle 
2 or 3 in. long, erect, bearing several tubular membranous oblong sheaths; the 
raceme two or three times as long as the peduncle, horizontal or decurved, bearing 
from four to six rather distant flowers 2 to 3 in. in diameter. Floral bract mem- 
branous, oblong, sub-acute, shorter than the slender pedicelled ovary. Sepals oblong, 
sub-acute or blunt. Petals broadly ovate, sub-acute, Zip narrowed and  convolute 
in its lower part, the anterior part expanded, concave, orbicular-reniform, its margins sub- 
fimbriate near the base, undulate near the apex; the upper surface tomentose. Column 
and foot both short, the latter with a nectary near the base; mentum short. Lindl. in 
Paxt. Fl. Gard, II, 104, fig. 189; Bot. Mag., t. 6993;  Reichb. fil in Walp. Ann. 
VI, 293; Hook. fil Fl. Br. Ind. V, 946. 
