32 
CXXXVI. ORCHlDEiE. 
[Desmotrichum. 
sub-quadrate, edges truncate fimbriate. Capsule elliptic, 75 in. 
long. Hab. Rare. Singapore, Pulau Selitar (Ridley). 
9 . DENDROBIUM, Sw. 
Epiphytic, rarely terrestrial plants with short rhizome and 
several erect many-jointed stems not branched, sometimes with 
some of the lowest internodes swollen. Leaves fleshy, coriaceous 
or thin. Flowers in short or large racemes, axillary. Lateral 
sepals forming a mentum being attached to the prolonged 
foot of the column. Petals generally smaller. Lip varied, with¬ 
out or with a callus at base, usually clawed, entire or 3-lobed. 
Column short, broad with short arms, with a long foot at base. 
Anther ovate or helmet-shaped 2-celled attached by a short 
process. Pollinia 4, ovoid or oblong in pairs. Capsule elliptic or 
pear-shaped. Species about 500, tropical Asia to Japan, Australia. 
§ 1. Bulbodium. Stems short clubbed angled. Leaves 2 terminal. 
Flowers 1 or 2 from between the leaves. 
Stem not strongly 4-angled . . . . (1) D. pumilum 
§ 2. Aporum. Stems flattened with distichous ensiform or triangular 
short leaves. Flowers very small or medium, white, yellow or pink in short 
tufts of brown bracts. 
Terminal part of stem covered with sheaths only; 
leaves triangular. Flowers very small. 
Lip narrow, tip bilobed, white 
Lip narrow, tip reniform white, column pink 
Lip tip obovate; flowers pink 
Stem leafy to top; flowers small. 
Leaves oblong or lanceolate broad not imbricating. 
Lip cordate, side-lobes short blunt, midlobe 
broad, callus transverse 
Lip side-lobes long curved, midlobe shorter 
Lip obcuneate bilobed; flowers much larger; 
leaves -5 in. wide .... 
Lip oblong-obcuneate; sepals 75 in. long; 
leaves ’25 in. wide .... 
Leaves narrow ensiform imbricating. 
Lip entire oblong spathulate. 
Bracts numerous; leaves 2 in. long 
Bracts few; leaves 75 in. long 
Lip side-lobes distinct; flowers deep red 
Leaves broad short; stem leafy to top; flowers 
large. 
Stems erect; flowers 17 in. across 
Stems prostrate creeping; flowers smaller 
§ 3. Sirongyle. Stems slender not swollen at 
terete or slightly flattened, 
white often veined pink. 
Stems over 1 ft. tall; flowers 75 in. long , 
Stems 12 to 18 in. long. Leaves recurved flat¬ 
tened laterally, pungent 
Stems 4 to 8 in. long; leaves 5 to 1 in, long, sub- 
terete straight ..... 
Leaves -5 in. long, flattened recurved; small plant 
Leaves terete acuminate erect appressed to stem 
(2) D. serra 
(3) D. rhodostele 
(4) D. rosellum 
{5) D. eulophotum 
(6) D. lobatum 
(7) D. grande 
(8) D. terminate 
(9) D. atropurpureum 
(10) D. sinuatum 
(n) D. atrorubens 
(12) D. leonis 
(13) D. prostratum 
base. Leaves distant 
Flowers 2 to 3 from axils of leafless tip of stem 
(14) D. teres 
{15) D. acerosum 
(16) D. kentrophyllum 
(17) D. subulatum 
(18) D. flexile 
