ORCHIDACEiE 



ad apicem caulis versus sensim decrescentibus ; racemo oblongo H. Selero- 

 vel cylindrico laxe p[l]urifloro; bracteis ovatis acutis velacumi- ^^^ 

 natis ovario graciliter pedicellato multo brevioribus; floribus 

 viridi-flavescentibus illis H. alatce Hk. fere sequimagnis; sepalo 

 intermedio suborbiculari obtuso, 0.6 cm. diam., cucullato, sepalis 

 lateralibus deflexis obliquis late oblongis apice breviter acumi- 

 natis 0.6 cm. longis, medio fere 0.4 cm. latis ; petalis erectis ob- 

 longis apice truncato-obtusissimis, carnosulis, basi baud dentatis, 

 0.5 cm. longis, medio fere 0.2 cm. latis; labello deflexo, linear! 

 obtuso, basi interdum utrinque denticulo minuto donato, 0.8 cm. 

 longo, vix 0.2 cm. lato, carnosulo, calcare filiformi acuto de- 

 pendente, ovarium bene excedente, c. 3 cm. longo; anthera 

 emarginata, canalibus gracilibus adscendentibus ; rostello humili, 

 lobo intermedio triangular! obtusiusculo carnoso; processibus 

 stigmaticis crassis, clavatis, canalibus antberarum duplo breviori- 

 bus, apice coh£erentibus ; capsula clavata, glabra, pedicellata. 



" Habitat in Guatemala, in provincia Alta Vera Paz, ad margines silvarum 

 prope Cohan: Sel. n. 2492.— Dec." Schltr. he. cit. 



I am indebted to Professor Kranzlin for a sketch of this 

 species. Kranzlin suggests that H. Selerorum is very near ''H. 

 monorrhiza' {H. alata of this w^ork), but that a sure determi- 

 nation on this point is impracticable ov^^ing to the poor condi- 

 tion of the flowers on the specimen he examined. I have seen 

 no material. 



The truncate obtuse petals may prove to be a constant dif- 

 ferentiating character when this species is compared with H. 

 alata. In general habit, H. Selerorum as shown by Kranzlin's 

 sketch very closely resembles H. alata Hook., and should be 

 rigidly compared with it. 



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