ORCHIDACEiE 



ceolata, acuta, uninervia, extus leviter carinata, mentum .5-. 75 

 mm. longum valde obtusum formantia. Sepalum dorsale 2 mm. 

 longum, valde concavum, oblongo-ellipticum, obtusum, apice ro- 

 tundatum. Petala spathulata, plus minusve 1 mm. longa, valde 

 obtusa, apice rotundato, enervia ut videtur. Labellum 1.25 mm. 

 longum, ecallosum, .5 mm. latum infra apicem, spathulatum, ob- 

 tusum. Columna 1 mm. longa, gracilis, supra medium utrinque 

 alata, ala subquadrata, obscure et irregulariter crenulata. 



Pkurothallis Schaferi is similar in habit to P. Grobyi Lindl., 

 but is a much smaller plant with a very different lip and column. 

 In the aspect of the foliage it resembles very closely P. licheni- 

 cola Griseb., from which it is clearly distinguished by its smaller 

 flowers and ecarinate lip. 



Cuba, Oriente, Sierra Nipe, near Woodfred, J. A. Schafer 3441^ Jan- 

 uary 5, 1910. Bases of trees in rich woods. 450-550 meters altitude. 



Pleurothallis Williamsii Ames sp. nov. Herba epiphytica 

 ut videtur, usque ad apicem inflorescentiae plus minusve 1 dm. 

 alta, radicibus numerosis, albidis. Caules secundarii caespitosi, 

 monophylli, usque ad 7 cm. longi, bracteis infundibuliformibus 

 ornati. Bracteae quinque ad duodecim, marginibus ciliolatis, in 

 sicco diaphanae, apiculatae, nervis prominentibus, brunneis, plus 

 minusve 5 mm. longae, plus minusve 5 mm. inter se distantes. 

 Folium cum petiolo 15-19 mm. longum, usque ad 8 mm. latum 

 trans medium, coriaceum, in sicco conspicue marginatum, apice 

 minute bidentatum, basi cuneatum, nervo medio subtus carinato. 

 Petiolus 2 mm. longus. Pedunculi terminales et laterales, gra- 

 ciles, plus minusve 5 cm. longi, infra racemum bracteis tubulari- 

 bus paucis, vulgo quinqueflori. Bracteae flores subtendentes par- 

 vae, infundibuhformes,quam pedicellus cum ovario multo brevi- 

 ores. Sepala lateraha vix 4 mm. longa, usque ad 1 mm. lata infra 

 medium, triangulari-lanceolata, acuta, conspicue uninervia. Se- 



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