(66 ) 
B. Receptacle paleaceous. 
a. Anthers obtuse or sagittate at ther 
base, but never calcarate. 
aa. Involucre 1-seriate or nearly so. 
1. Iva.—? flowers reduced to short tubes 
embracing the base of thestyle. & flow- 
ers: anthers scarcely connate. 
2. Balsamorrhiza.—Akenes of the disc 4-an- 
gular. Pappus 0. 
3. Wyethia.—Akenes 4-angular or laterally 
compressed. Pappus paleaceous, crown- 
shaped. 
4. Pugiopappus.—Akenes villous. Pappus 
2-aristate. 
5. Leptosyne.—Akenes naked, margined. 
Pappus almost 0. 
6. Madia.—Involucre in a simple row, each 
scale wrapped about a laterally com- 
pressed akene. Pappus 0. 
7. Holozonia.—Involucre in a simple row, 
each scale completely embracing an 
akene. Pappus of the ray akenes hya- 
line, of the dise generally 0. 
8. Hemizonia.—Involucre 1-seriate, each 
scale embracing with its base half of a 
ray akene. Pappus of the ray 0. 
