G80 CXXV. OECIIIDACE.'E. 



Stems branched, the branches formed by chains of uninodal 

 sessile or stijiitatc ))seudobulbs. Lea!' solitary, teruiinal, 

 coriaceous, Hat, peristent. Flowers 1-3 from the base 

 of the leaf, medium-sized, white or pale, lasting only one 

 day; mentum (.sj'jKr) short ; the edge of the lip plicate ... 1. B, Macr(ei. 

 rseudobulbs short, tufted, with 2 or 3 leaves ; or stems 

 elongate and leafy. Leaves narrow, membranous, decidu- 

 ous or persistent. Flowers in slender terminal or 

 lateral racemes, small or medium-sized ; mentum rather 

 long, conical, incurved, or short and olituse ; lip often 

 willi a flat keel on the disk that terminates in a truncate 

 crenate callus on the midlobe. 



Stems simjjle or nearly so, often a small pseudobulb. 

 Small plants with crowded ovoid psudobulbs ; 

 flowers small, in racemes from the top of the 

 pseudobulb ; petals not broader than the doi'sal 

 sepal. 



Sepals and petals white ; lip pink with dark- 

 red veins 2. D. microhol/ion. 



Sepals and petals white; lip yellow-green 3. D. Mahcla. 



Larger plants ; stems tufted, 10-18 in. long; flowers 

 in terminal and lateral racemes ; petals broader 

 than the dorsal sepals. 



Lateral sepals oblong; midlobe of lip sub- 

 quadrate; flowers orcam-colored 4. D. chhn-fqw. 



Lateral sepals lanceolate, falcate ; midlobe of 

 lip ovate, acute; flowers white, often with a 



tinge of pink 5. D.harbatnlnm. 



Stems long, copiously branched ; flowers small 6. I), hcrhaceum. 



Stems elongate, stout or slender, cylindric, clavate or 

 nodose. Leaves membranous or coriaceous, persistent 

 or deciduous. Flowers usually large, in lateral pairs or 

 fascicles or racemes (very rarely solitary), variously 

 colored, white, yellow, or purple. 



Mentum (spur) half as long as the dorsal sepal ; lip 



longer than broad 7. -D. macrostachi/um. 



Mentum less than half as long as the dorsal sepal ; 



lip as broad as long 8. J), crepiclatum. 



1. Dendrobium Macraei, Lindl. Gen. Sf &p. Orddd. (1830) p. 75. 

 Eliizome creeping, annulate, giving off pendulous smooth polished stems 

 2-J3 ft. long, bearing at irregular intervals narrowly fusiform somewhat 

 compressed shining pseudobulbs 2-2\ in. long ; internodes long, terete. 

 Leaf terminal from the top of the pseudobulb, solitary, 4-8 by |-1 iii., 

 linear-oblong, obtuse, with numerous parallel slender veins. Elowers 

 remaining open for a few hours only, 1-3 from near tlie base of a leaF, 

 '^—1 in. across, white, the lip and mentum yellow [in the 8ikkim specimen 

 hgxu'ed in the Annals of the lioyal Botanic (Jarden, Calcutta {I. c), the 

 side lobes of the lip are shown pale-jjiidv speckled witli red, the middle 

 grcenisli-yellow] ; bracts beneath the flower small, ovate, acute, 

 sheathing. ISepals oblong-lanceolat'e, subacute, spreading. Meiitum 

 {fipur) short, broad, conical. Petals narrower than the sepaL'^, linear- 

 oblong, obtuse. Lip oblong-obovate in general otitliiie, decurved about 

 the middle, concave ; side lobes oblong, obtuse, the disk between them 

 with 2 fleshy crests ; midlobe contracted and coarsely erose-crisped at 

 its base, the terminal part expanded and the edges much plicate. Column 

 short with a short foot ; pollinia narrowly oblong. Y\. 13. 1, v. 5, p. 714; 

 ])alz, & Gibs. p. 260 ; Trim. Fl. Ceyl. v.*4, p. 150; King, in Ann. llov. 

 J3ot. (Jaid. Calc. v. 8 (18!»8) [>. 01, t. 80 ; Woodr. in Journ. IJomb. Nat. 



