TROPICAL AMERICAN ORCHIDS 
A close ally of P. Wercklei Schltr. and P. vinacea Ames, 
from both of which species it differs conspicuously in the 
structure of the labellum and in the more robust habit of the 
plant. [Plate 4.] 
Costa Rica, Carpintera, C. H. Lankestcr 512, Sep¬ 
tember 4, 1923. Flowers dull maroon. 5500 feet altitude. 
(Type in Herb. Ames No. 27217.) 
Illustrations of Central American Species 
of Pleurothallis 
Pleurothallis abjecta Ames Sched. Orch. 2 (1923) 17. 
Plate 5: 1, lateral sepals X 5. 2, petal X 6. 3, dorsal 
sepal X 5. 4, labellum from the side X 7. 5, labellum from 
above X 7. 6, column X 6. 
Pleurothallis amethystina Ames Sched. Orch. 4 
(1923) 14. 
Plate 13: 1, labellum with lateral lobes in natural posi¬ 
tion X 5%. 2, labellum with lateral lobes spread out X 5%- 
3, column X 5. 4, flower X 2^. 5, lateral sepals X 2)4. 
6, petal X 3. 
Pleurothallis arietina Ames Sched. Orch. 4 (1923) 16. 
lUate 16: 1, labellum with the basal lobes spread out X 
8. 2, labellum from above, basal lobes in natural posi¬ 
tion X 8. 3, column X 4, petal X 2%. 5, lateral 
sepals X 2%. 6, dorsal sepal X 2h. 
Pleurothallis Brighamii S. Wats, in Proc. Am. Acad. 
23 (1888) 285. 
Plate 7: 1, column X 5. 2, labellum X 8. 3, lateral 
sepals X 2. 4, petal X 4. 
Pleurothallis cachensis Ames Sched. Orch. 4 (1923) 
17. 
Plate 8: 1, labellum from the side X 8. 2, petal X 8. 
3, lateral sepals X 3. 4, labellum X 8. 5, column X 6. 
25 
