(109) 



52. Soliva Ruiz & Pavon. 



Necessaria. Superflua. Eay-flowers oo, with- 

 out corolla. Style scarcely bifid, persistent. 

 Receptacle flat, naked. Akenes obcompressed, 

 winged, crowned by the style, sessile, pappus 

 0. — 0. Flowers inconspicuous. 



1. S. SESSiLis Ruiz & Pavon. — Moist grounds 

 near the coast. All the year round. 



53. Cotula L. Brass-Buttons. 

 Superflua. Corolla of ray-flowers wanting. 

 Receptacle flat, naked, papillose. Akenes com- 

 pressed, wdnged, those of the ray stipitate; 

 pappus 0. — 0. Flowers yellow. 



1. C. COEONOPIPOLIA L. Leaves pinnatifid. 

 Aquatic. All the year round. 



2. C. AUSTRALis Hook. Leaves bipinnatifid; 

 lobes linear. — Waste places. All the year 

 round. 



54. Tanacetum L. Tansy. ^ 



^qualis. Superflua. Ray-flowers not ligu- 

 late. Receptacle convex, naked. Akenes an- 

 gulate, with large epigynous disc. Pappus 

 coroniform, or 0. — 21- Flowers yellow. 



1. T. CAMPHORATUM L e s s . Sufirutescent. 

 Sand dunes near San Francisco. Summer. 



55. Artemisia L. Wormwood. Sage-Brush. 



iEqualis. Superflua. Necessaria. Ray 

 flowers tubular. Scales of involucre dry, with 



