NEW OR NOTEWORTHY ORCHIDS 
to Pleurothallis mgrtillus, it is clear that P. myrtillus is con- 
specific with P. cedralensis Ames and should be reduced to 
synonymy. 
Costa Rica, pres de San Ramon, A. M. Brenes 23, 
November 1921. 1025 meters altitude: Province of San Jose, 
La Hondura, Paul C. Standley 36376, 36402, 36445, March 
2-4, 1924. 1300-1700 meters altitude; Standley 37620, 
37648, March 16, 1924. 
Pleurothallis costaricensis Rolfe in Kew Bull. (1917) 
80; Ames Sched. Orch. 7 (1924) 26, t. 14. 
Pleurothallis ehrhartiiflora Schllr. in Fedde Repert. 
Beihefte 19 (1923) 187. 
Dr. Schlechter eompared his P. ehrhartiiflora with P. 
glumacea Lindl. and with P. tricarinata Poepp. & Endl. 
Studies of duplicate material of the type of P. ehrhartiiflora 
have convinced me that this species is inseparable from P. 
costaricensis. 
Costa Rica, San Pedro de San Ramon, A. M. Brenes 
141, September 1921. 950 meters altitude. 
Pleurothallis navarrensis Ames sp. nov. Rhizoma 
repens. Caules secundarii valde abbreviati, vaginati, vaginis 
hispidulis. Folium ellipticum, marginatum. Pedunculi valde 
abbreviati. Sepala lateralia paene usque ad basim libera, 
mentum formantia, glanduloso-ciliata, ovato-oblonga. Sepa- 
lum dorsale simile. Petala anguste lanceolata, uninervia, 
margine ciliato. Labellum linguiforme, bene glandulosum, 
utrinque prope unguem lobulatum. Callus in disco prope 
unguem coniformis. Columna in pedem producta, clinandrio 
fimbriato. 
Rhizome creeping, giving off coarse, whitish roots. 
Seeondary stems much abbreviated, monophyllous, more or 
less decumbent, about 5 mm. long, concealed by infundibu- 
liform rufous sheaths which become dilated and marginate 
above with hispidulous emergences on the nerves. Leaf 
elliptical or suborbicular, obscurely marginate, very coria¬ 
ceous, conspieuously and deeply rugose when dry, purplish 
34 
