i3 



latim nervosa. r*\W//*/wamplum,profundeobcordatum, 18-20 mm. latum, 

 costa dorso carinata, apice valide rostrata. Alee sessiles, 2 cm. longre; lo- 

 bus basalis parvus, apice obtusus, pilo terminatus; distalis multo major, 

 late obcordatus, muticus; auricula dorsalis parva. Labelli limbus cymbi- 

 formis, subaristatim acuminatus, i3 mm. longus, horizontalis : calcar gra- 

 cile, 20-25 mm. longum. Filamenta brevissima, lata; anthers orbiculares, 

 connata^. Ovarium breve, turgidum. 



Laos : bassin d'Attopeu, alt. 600-700 met. (Harmand). 



1 



6. /. Thorelii Hk. f., sp. nov. 



Herba erecta, glaberrima, exsiccata flaccide, parviflora, caule simplice, 

 gracili, 2-2,5 dm. alto. Folia 4-7 cm. longa, alterna, longe petiolata, mem- 

 branacea, ovata v. ovato-lanceolata, acuminata, minute serrulata, basin 

 versus ciliata, in petiolum gracile 2-4 cm. longum angustata; nervis utrin- 

 que 5-6. Inflorescentia simpliciter pedicellata; pedicelli capillares,florentes 

 foliis breviores, fructiferi 5-7cm.longi.F/oresad i5 mm. expansi. Sepala 3, 

 orbicularia, cuspidata, 4 mm. diam. Vexillum late obcordatum, 10 mm. 

 latum, costa apice sinu mucronata. Alee sessiles, 12 mm. longae, lobi su- 

 berecti, basalis obovatus, apice rotundatus; distalis paullo longior et latior, 

 subtruncatus, auricula dorsalis obscura. Labelli limbus scaphiformis, ova- 

 tus, acutus, 7 mm. longus, ascendens, calcar gracile, 3-5 cm. longum. 

 Filamenta brevissima; anthers minute, connate. Ovarium breve, turgi- 

 dum. Capsulce 1 m. longae, fere recta?, medio gibbosim turgidre, utrinque 

 alternate, stipitatae, acute rostrata?, polyspermae. Semina minima, ellip- 

 soideo-oblonga, 1 mm. longa, laevia, castanea, nitida. 



Laos : Stung-treng, n. 21 13 (Thorel). 



7. /. obscura Hk. f., sp. nov. 



Herba humilis, succosa? flaccida, glaberrima, parviflora, caule gracili, 

 flexuoso, diffuso, ramoso, ascendente v. prostrate Folia 3-4 cm. longa, al- 

 terna, petiolata, membranacea, ovata v. ovato-rotundata, acuta v. obtusa, 

 integerrima v. obscure crenulata, setulis minimis interdum interjectis, in 

 petiolum gracile 2-3 cm. longum angustata ; nervis utrinque 4-5. Inflorescen- 

 tia simpliciter pedicellata ; pedicelli foliis breviores. Flores ad 1 cm. expansi, 

 rosei. Sepala 2, ovata, obtusa, 4 mm. longa, inaequilatera, 7-9 nervia. Vexil- 

 lum amplum, subquadratum, 5 m. latum, margine superiore intruso, costa 

 dorso carinata, apice minute uncinatim rostrata. Alee sessiles, latiores quam 

 longae, ad 6 mm. longae; lobus basalis fere orbicularis v. obcordatus; distalis 

 paullo longior, subobcordatus ; auricula dorsalis decurva. Labelli limbus 

 brevis,cymbiformis, acutus, ad 6 mm. longus : calcar gracile, 2 cm. longum. 

 Filamenta brevissima, subulata : antherae orbiculares, connate. Ovarium 

 breve, obtusum. Capsula* parvae, S-10 mm. longa?, gibbosim turgidte.subses- 

 sdes, acuta;, polyspermae. Semina ad 2-5 mm. longa, obovoidea, papillosa. 



