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Clayis specierum. 



A. Labellum utrinque alatum (Ommatodium). 



1. Pt. Volncris Siv. 



B. Labellum utrinque lobulatum. 2. Pt. alativm Siv. 



C. Labellum exalatum (Eupteryj^-odium). 



a. Flores resupinati normales (labellum inferum). 



Labellum minutum lineare, appenrlix alta cruci- 

 formis. 3. Pt. criiciferum Sond. 



Labellum minutum ovati-triang-ulum, appendix cu- 

 cullata in sepalo dorsali occulta. 



4. Pt. acutifoliiim Lindl. 

 Labellum breve rhombeum, appendix pandurata. 



5. Pt. catholicum Stv. 

 Labellum oblonjifum minus quam appendix apice 

 hastata. 6. Pt. hastatum Bolus 

 Ivabellum oblongum, appendix major apice triden- 

 tata. 7. Pt. Penthe7'iamwi Schlechter 

 Labelliim sellaeforme subbilobum, appendix trian- 

 gula patula auriculata multo major. 



8. Pt. alare Durand et Schinz 

 Labellum bilobum, ajipendix magna cucullata gyno- 

 stenriiformis. 9. Pt. ca/frum Sw. 



Lalellum cuneatum flabellatum ipsum et petala 

 antice ciliata, appendix supra dilatata. 



10. Pt. magnwn Bchh. f. 

 [l^Flores resupinati fere semper cleistogami, planta ce- 



terum N. 5 afftnis. 



Petala et labellum apice ciliata v. lacera. 



1 1 . Pt. Neicdigatae Bolus 

 -{. Flores non resupinati (labellum superum). 



Planta elata (60 cm), labellum parvum spathulatum, 

 appeudix multo major pandurata. 



12. Pt. inversum Sw. 

 Planta mediocris (20 cm), labellum oblongum basi 

 papillosum, appendix subsimilis deflexa carinata. 



13. Pt. Flanagani Bolus 



