(110 ) 
scarious margins. Receptacle naked or villous. 
Akenes obovate, with small epigynous disc; pap- 
pus 0. Heads small; flowers yellowish. 
1. A. PycNocepHaLa DC. Superflua; flowers 
of the disc 8, but sterile; their style not bifid; 
plant silky-villous; leaves pinnately parted.— 2. 
Seashore. Summer. 
2, A. DRACUNCULOIDES Pursh. Superflua. 
Flowers of the disc 3, but sterile; their style 
not bifid; plant glabrous; leaves linear.—2f. 
Lake Chabot. Summer. 
3. A. Catrrornica Less. Superflua. Flow- 
ers of the dise 8%, and fertile; their style bifid; 
frutescent, paniculately branched, canescent; 
leaves pinnately parted; lobes filiform.— b. 
Common. Summer. 
Branches and leaves insecticide of con- 
siderable power. 
4. A. Lupovictana Nutt. Style of the flow- 
ers of the disc bifid; involucre tomentose; 
leaves lanceolate; the lower frequently parted 
into 3-5 lobes.—2f. Common. Summer. 
Tribe VII. SEnEcIonIDz. 
Receptacle naked. Pappus capillary. 
56. Nardosmia Cass. (Petasites, Tourn.) 
Moneecia, Necessaria. Heads dimorphous, 
é or § contains ¢ flowers o, ? flowers few. 2 or 
% head contains ¥ or ¢ flowers few, 2 flowers a. 
