122 oxLviii, OROHIDEJS. (J. D. Hooker.) [Didymeplexia. 



D. pallens, Ghiff. in Galcutt, Journ. Nat. Hist. ir. 383, t. 17; 

 Semsl. in Journ. Linn. Soc. xx. 311, t. 28 ; Kurz in Seem. Journ. Bat. 1866, 

 40 {excl. Syn. Epiblema & Oastrodia), Leucorehis sylvatica, Blume Mms. 

 Bot. i. 31 ; Orchtd. Archip. Ind. 147, with, woodcut. Apetelon minntnm, 

 Wight Ib. t. 1758. Arethusa ecristata. Griff. Notul. iii. 378 ; Ic. Plant. 

 Asiat. t. 343, 344. A. bengalensis, Sort. Bot. Gale. Epiphanes pallens, 

 Beichb.f. in Seem. Fl. Vit. 296. 



Lower Benoal ; from the foot of the Sikkim Himalaya to Calcutta. KvEG- j 

 in bamboo jungles, Jerdon. Febak, Scortechini, Wray. 



Root branching and tuberous ; stem 4-6 in., sheaths loose. Uaeemes terminal, 

 4-8 fld. J bracts broadly ovate ; flowers shortly pedicelled, dull yellow-white, perianth 

 J in. diam. subcampannlate ; dorsal sepal ovate, obtuse, hooded ; petals shorter and 

 broader than the dorsal sepal, truncate, 3-nerred ; lateral sepals united to the middle, 

 &ee portions obtuse j lip stipitate, transversely or obcuneately oblong, membranous, 

 with 3-median nerves between which the disk is papillose. Ca/psule 1—1-^ in. , erect, 

 fusiform, pedicel 3-8 in. — Ridley 1. c. distinguishes his D. pallem from Blume's 

 st/lmatica by the entire lower lip of the latter, overlooking Blame's woodcut of the 

 syl/oatica, which represents it as 2-lobed. 



100. GASTRODXA, Br. 



Terrestrial leafless brownish, tuberous herbs ; stem erect, sheathed. 

 Flowers in lax racemes. Sepals connate with the petals into a ventricose 

 5-lobed tube slit anteriorly. lAp short, base adnate to the foot of the 

 column and to the perianth, blade entire. Oolumn usually long, narrowly 

 2-winged, foot short or 0; rostellum small; stigma prominent; anther 

 tumid ; poUinia ecaudate, free. — Species 7, Asiatic, Malayan and 

 Australasian. 



1. 6. orobancholdes, Benth. in Gen. Plant, iii. 617 ; lip adnate to 

 the tube of the perianth with a short sessile ovate obtuse free plane blade. 

 Rook.f. Ic. Plant, t. 1853. Gramoplexis Falc. in Royle III. 364; Imdl. 

 Gen. & Sp. Orchid. 384 ; Gr. orobanchoides, Falc. in Trans. Linn. Soc. xx. 

 293, t. 13. 



Tempeeatb Himaiaxa, alt. 7-8000 ft., from Kashmir to Garwhal, Falconer, 

 &c. 



Soot a large oblong or ellipsoid annulate tuber, parasitic by a small fibrous base 

 to roots. Stem 10-24 in., usually very stout ; sheaths short, loose, truncate. Raceme 

 loosely many-fld. ; bracts oblong, acute, variable iu size ; flowers suberect, pedicels 

 short ; ovary turgid ; perianth ^-| in. long, ventricose, base gibbous, lobes very short 

 obtuse, sepaline rather longer than the petaline ; lip longer still, sessile, ovate, 

 obtuse, recurved. Capsule f in., erect, turgid. 



2. Cx. elata, Blume Mus. Bot. ii. 174; Orchid. Archip. Ind. 143, 

 t. S3 ; claw of lip adnate to the perianth and furnished with a pair of large 

 fleshy prominent calli, limb free ovate-oblong. 



Chumbi ; a Tibetan province east of Sikkim, King's Collector. — DiSTElB. Ohina, 

 Japan. 



Habit, inflorescence and flowers of G. orohanchoides, but differing in the lip, 

 the adnate claw of which has an almost reniform callus on each side, whereas in the 

 first-named species the position of the claw on the perianth is marked by two 

 thickened lines. Tlie Chumbi specimen is a bad one, but having examined many 

 flowers of it and of the Japan plant, I have no reason to doubt their identity. 



