Supplement, ^e.] cxtTiii. OBOHiDBiB. (J. D. Hooker.) 185 



P. 730. 79. D. ADTTNOTTM. Dele Sot. Mag. t. 6784.— Two very closely allied 

 species are confounded under this name. D. adttnoum: and D. hbecoglossum, 

 agreeing in habit, foliage, inflorescence, and very nearly in flowers, but dis- 

 tinguished by the lip, which in aduncum has a glabrous area on the disk, its flowers 

 too are paler, the sepals less acuminate, and the arms of the column more notched. 

 Until quite recently the native country of aduncum was unknown, and it was sup- 

 posed to be specifically the same as a Chinese plant which Reichenbach described as 

 hercoglossum, and wliich in Veitch's " Manual " is cited as » synonym. The lip in 

 both is very shortly clawed. Lindley regarded D. aduncum as closely related to D. 

 moschatum, but to me it seems widely different. 



The following are the characters of the two species : — 



79. D. ADUNCUM; flowers pale pink, lip with a broad naked area on the 

 pubescent disk. — Sikkim and Bhotan Himalaya, Assam. 



79/1. D. HEECOQLOSSDM, Reiclib. f. in Samh. Gartenzeit. xliii. 558, in Gard. 

 Chron. 1886, ii. 487 ; flowers bright rose-red, disk of lip villous all over. D. 

 aduncum, Kooh.f. Bot. Mag. t. 6784. 



SlNGAPOEE, Ridley in Hit. China. 



79/2. D. FLATIDULUM, Ridley mss. ; stems slender pendulous, leaves liuear- 

 lanceolate, racemes on the leafless stems short, bracts subacute, dorsal sepal ovate- 

 oblong obtuse, tip thickened, lateral ovate acute deeply keeled from the middle 

 to the tip, petals oblong obtuse 5-nerved, mentnm large obtuse shorter than the 

 lateral sepals, lip ovate-oblong 3-fid beyond the middle, lobes ciliate, midlobe 

 thickened. 



SlNOAPOEB ; at Kranji, in Mangrove swamps, common, Ridley. 



Stems 12-18 in., rather flexuous, soft, internodes about 1 in. Leaves 2^-3 in., 

 acuminate with a notch on one side, membranous. Raceme with the slender 

 peduncle J-2 in. ; bracts i in. j flowers ^ in. long; sepals and petals rigid; lip 

 7-nerved, lobes ovate-oblong obtuse. — A very distinct species. Mr. Ridley informs 

 rae that there are 2 forms of it, one with flowers all yellow, the other with white 

 sepals and petals. 



81. D. coENtTTUM. Insert after le. Plant, t. 2029. 



P. 731. 82. D. CUMTJIATTTM. I have examined specimens preserved in spirits 

 sent by Dr. King (collected by Mr. Lister in Bhotan). The claw of the lip is not 

 short, but may be traced down the spur, and is as long as the blade ; and what 

 appeared as a small tubercle in the dried specimen is an elongated grooved callus 

 much raised towards base of the claw, the mentum is more or less laterally com- 

 pressed, sometimes longer than the sepals. The Perak plant doubtfully referred to 

 D. cumulatum is very different, but not in a state for description. 



P. 731. 81/1. D. OEOOATUM, Hook, f.; stems terete, leaves 4 by 1 in. lanceo- 

 late acuminate, racemes on leafless stems slender few-fld., dorsal sepal and petals 

 broadly oblong subacute 7-nerved, mentum twice as long as the ovate-oblong sub- 

 acute lateral sepals slender spur-like acute, lip large spathulate, claw as long as the 

 obovate entire crenulate limb, with an obtuse oblong reversed callus at the base. 



Perak ; at Larut (Ic. in Sort. Caloutt). 



Stems 2-3 ft., narrowed to the base, which is not tuberous, internodes 1 in., i in. 

 diam. Leaves bright green, many-nerved. Raceme 1 in.; bracts small, ovate; 

 pedicel with ovary slender, ^ in. ; flowers IJ in. long, bright orange yellow with 

 red specks on each side of the lip towards the base of the limb ; mentum nearly 

 straight. — Described from dried flowers and a drawing that will be published in 

 King's Annals cf the Calcutta Garden. 



84. D. KENTEOOHrOTM, after Hook.f. insert Ic. Plant, t. 2030. 



85. D. MBaAOEEAS, after HooTc.f. insert Ic. Plant, t. 2031. 



P. 732. 87. D. HTMENANTHFM, after Soak, f. insert Ic. Plant, t. 2032. There 

 being an earlier D. hymenantMm (Lindl. Gen. & Sp. Orchid. 86), I have nam,ed this 

 species hxmenoetebitm in the " Icones Plantarum." 



