Pirate XXII. PLevrorHatiis sparHutiroiia C. Schweinf. 
1, plant, one and one half times natural size. 2, flower 
from above, expanded, five times natural size. 3, column 
and lip from side, ten times natural size. 4, lip from 
above, twenty times natural size. 
PLEUROTHALLIS CAUDATIPETALA C. Schweinf. 5, plant, two 
and one half times natural size. 6, flower from above, 
expanded, five times natural size. 7, lip from above, 
expanded, twenty times natural size. 8, column and 
lip from side, ten times natural size. 
Pirate XXIII. Pieuroruattis Varcasi C. Schweinf. 
1, plant, one half natural size. 2, flower and ovary from 
side, five times natural size. 3, column and lip from side, 
five times natural size. 4, lip from above, five times nat- 
ural size. 5, petal, five times natural size. 6, dorsal 
sepal, five times natural size. 7, lateral sepals, expand- 
ed, five times natural size. 
Pirate XXIV. Ocromerta compLanata C, Schweinf. 
1, plant, natural size. 2, flower and ovary from side, 
five times natural size. 3, flower from above, expanded, 
five times natural size. 4, lip from above, expanded, 
ten times natural size. 5, column and lip from side, ten 
times natural size. 
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