176 IcrN. IJrban: 



distiucte trinervulosis, valde concavis, lateralibus angiistioribus, dorso 

 carinatis, usque ad -/s connatis; petalis ovato-subqiiadraügulis, apice 

 subtruucatis et leviter retusis, crassiuscule tricostatis, superne subtiliter 

 papillosis, sepalis multo brevioribus; labello petalis aeqiiilongo, graci- 

 liter articulato, anguste ovato, obtiiso, basi subtrimcato, crasse tri- 

 costato, margine diaphauo, superne subtiliter granuloso; columna 

 gracillima, petalis brevaore, clinandrio liyalino, postice producto, tri- 

 denticulato. 



Radices numerosissimae, dense fascicidatae , filiformes, tortuosae, 

 albidae. Gaules paulo flexuosi, 2 — 5 cm. longi, 1 — IY2 t^^- crassi; vaginae 

 2 — 3, laxae, scariosae, laeves, pluricostatae , apice oblique truncatae, 1 — 2 cm. 

 longae. Folium erectum, rigidum, limbo piano, 3 — 5 cm. longo, 13 — 

 18 mm. lato, petiolo gracili, 5 — 7 mm. longo. Pedunculus communis 

 erectus, subfiliformis, leviter flexuosus, teretiusculus, 10 — 13 cm. longus; 

 spatha basilaris rigidiuscula, obtusa, dorso carinata, 8 — 14 mm. longa; pedi- 

 celli erecti vel patuli, filiformes, subrecti, cum pedunculo breviter connati, 

 cum ovario 6 — 8 mm. longi. Bracteae scariosae, 4 — 5 mm. longae. Flor es 

 purpureo-fusci. Sepala 8 mm. longa, dorsale 2^/., mm. latum, lateralia 

 iy.2 mm. lata. Petala erecta, subplana, 3 mm. longa, 2 mm. lata. La- 

 bellum erectum, paulo concavum, 3 mm. longum, l^g ^^a. latum. Co- 

 lumna subrecta, apice nou vel vix dilatata, 2 mm. longa. 



Hab. in Sto. Domingo supra arbores in sylvis umbrosis prope 

 Constanza, 1200 m. alt, m. Jul. fl.: H. von Türckheim n. 3481. 



(137"). Pleurothallis cryptaiitha Cogn, (u. sp., sect. Hymeno- 

 danthae § Caespitosae): minima, caespitosa, glaberrima; caulibus bre- 

 vissimis, ascendentibus, filiformibns, 1-articulatis; folio minuto, coria- 

 ceo, elliptico - ovato , apice subrotundato, basi subabrupte in petiolum 

 longiusculum angustato, distincte margiuato et superne breviter denti- 

 culato - ciliato , subtus subtiliter sparseque punctato; pedunculo bre- 

 vissimo, solitario, 1-floro, basi squamis pluribns majusculis tenuiter 

 scariosis vestito; floribus minutissimis, in squamis basilaribus inclusis, 

 segmentis hyalinis; sepalis lineari-lanceolatis, 1-nerviis, lateralibus 

 fere usque ad apicem connatis; petalis anguste lineari-subspathulatis, 

 acutissimis, 1-nervulosis, integerrimis, sepalis multo brevioribus; 

 labello sepalis paulo breviore, augustissime breviterque unguiculato, 

 anguste lineari-ligulato, basi truncato, subtiliter trinervuloso ; columna 

 petalis paulo longiore, gracili, apice incrassata, clinandrio margine 

 subtiliter denticulato. 



Gaules recti vel paulo arcuati, 1 — -3 mm. longi. Folium erectum, 

 rigidum, utrinque saepius purpureo-violaceum , limbo plus minusve concavo, 

 6 — 9 mm. longo, 3 — 5 mm. lato, petiolo subfiliformi, 1 — 3 mm. longo. Pe- 

 dunculus capillaris, 1 — IY2 i^iii^^- longus. Flores erecti, purpureo-fusci. 

 Sepala satis concava, circiter 2^9 ^^- longa, dorsale -/s i^™- latum, late- 

 ralia in valvam 1 mm. latam connata. Petala paulo obliqua, inferne longe 



