298 
I. longirama has the flowers, fruit and seeds of L. tripetala, a 
species which, under many forms, abounds in the Assam Valley and 
extends westwards in Northern Bengal to Dacca and perhaps 
further, but nowhere assuming the characters of 1, longirama. 
13. I. tripetala, Rord., var. microscypha, Hk. f.; caule gracili, 
foliis oppositis et alternis, inflorescentia breviter pedunculata vel 
simpliciter pedicellata, floribus parvis, capsulis 1 cm. longis oligos- 
Herba gracilis, fere glaberrima, 3-4 dm, alta, parviflora, caule 
inferne nudo saepe lignoso simplici vel parce ramoso. Hola 5-12 cm. 
longa, opposita vel alterna, petiolata, membranacea, ovata vel 
oyato-lanceolata, acuminata, subintegerrima vel minute serrulata, 
basin versus nuda vel ciliata, in petiolum gracilem 1:7 cm. longum 
angustata, costa gracili, utrinque 8-1l4-nervia ; glandulae infra- 
petiolares breves, paucae, plurimae vel 0, saepe confertae. /nflores- 
centia nunc simpliciter pedicellata, nunc breviter pedunculata, 
pedunculo 0°5-1 em. longo 3-5-floro; pedicelli capillares, 1-2 cm. 
c 
longi, rosei, calcare albo; raphides 0. Sepala 2, ovata vel ovato- 
lanceolata, acuminata, 0°5-3 mm. longa. Vezillum orbiculare, 
muticum, fornicatum, costa dorso medio gibbo conico instructa. 
Alae late breviter stipitatae, 1°5-2 cm. longae ; lobus basalis amplus, 
rotundatus, distalis paullo longior, inflexus, obovatus ; auricula 
dorsalis magna, reniformis, inflexa. Labelli limbus late infundi- 
bularis, incurvus, 1*5-1°8 em. longus, deorsum ad basin rotundatum 
sensim attenuatus, antice supra basin in calcar breve incurvum 
obtusum repente constrictus, ore amplo 1:5 cm. longo obtuso 
apiculato — horizontali. tlamenta gracilia; antherae obtusae. 
Ovarium subclavatum, acuminatum. Capsulde erectae, 0°9-1'1 em. 
longae, medio tumidae, ellipsoideae, utrinque attenuatae, acutae, 
oligospermae. Semina 2-3 mm. longa, pyriformia vel obovoidea, 
compressa, laevia, minute papillosa, castanea, 
Manirur. Jhirighat, 450 m., Nov. 1907, A. Meebold, 5687; 
Bishenpur, 4. Meebold, 6725. 
A very frequent form, extending westwards to Bengal. 
* * Sepala lateralia 4 ; folia alterna ; inflorescentia pedunculata. 
+ Herba gracilis, parviflora. 
14. I. gibbisepala, Hk, f., sp. nov.; herba foliis ovato-lanceolatis 
crenatis, alarum lobo distali loriformi. 
