ORCHIDACEiE 



H. Dussii long£e. Sepala membranacea, dorsale 4 mm. longum et 3-3 J mm. 

 latum, lateralia 4^5 mm. longa et 2^ mm. lata. Petala erecta, 

 3-3j mm. longa, f mm. lata. Labelli lobus terminalis strictus, 

 tenuiter trinervulosus, 4|— 5 mm. longus, basi \^ mm. latus; lobi 

 laterales vix arcuati, 2|^ mm. longi; calcar 4 mm. longum, in- 

 ferne 1 mm. latum. 



"Flores virides. Fl. IX-XII;fr. X. 



*'Hab. in Guadeloupe in sylvis humidis ad Nez-Casse: Duss 

 n. 3931." Cogn. loc. cit. 



I have seen a single flower of this species taken, presumably, 

 from the type specimen in Urban's herbarium and given to me 

 by Professor Cogniaux. This flower shows clearly the affinity 

 of H. Dussii with H. alata, although the ovarian wings are 

 not so strongly developed as in that species. 



