(70) 



3. Hemizonia. — Involucre 1 - seriate, each 

 scale with its base half embracing a ray 

 akene. Pappus of ray akene 0. 



4. Madia. — Involucre 1-seriate, each scale 

 completely enwrapping a laterally com- 

 pressed ray akene. Pappus 0. 



b. Anthers almost distinct, 

 1. Iva. 



c. Anthers calcarate. 



1. Evax. — Scales of involucre 1 — 2-seriate. 

 Pappus 0. 



2. Stylocline. — Scales of involucre very few. 

 Flowers of the ray bracteate by a cari- 

 nate palea, but not enwrapped by it. 

 Pappus a few caducous bristles. 



3. Psilocarphus.— Scales of the involucre 

 few. Each ray flower enwrapped in a 

 palea. Pappus 0. 



V. Monogamia. 



1. Do^vningia. 



GYNANDRIA. 

 I. Mouandria. 



a. Labellam calcarate. 

 1. Habenaria. 



b. Labellinn not calcarate. 



1. Epipactis. — Labellum geniculate. 



