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52. Soliva Ruiz & Pavon. 
Necessaria. Superfiua. Ray-flowers o, with- 
out corolla. Style scarcely bifid, persistent. 
Receptacle flat, naked. Akenes obcompressed, 
winged, crowned by the style, sessile, pappus 
0.—©. Flowers inconspicuous. 
1. S. sessrzis Ruiz & Pavon.—Moist grounds 
near the coast. All the year round. 
53, Cotula L. Brass-Burrons. 
Superfiua. Corolla of ray-flowers wanting. 
Receptacle flat, naked, papillose. Akenes com- 
pressed, winged, those of the ray stipitate; 
pappus 0.—@©. Flowers yellow. 
1. ©. cornonorrrotia L. Leaves pinnatifid. 
Aquatic. All the year round. 
2. ©. austratis Hook. Leaves bipinnatifid; 
lobes linear.—Waste places. All the year 
round. 
54, Tanacetum L. Tansy. 
AMqualis. Superflua. Ray-flowers not ligu- 
late. Receptacle convex, naked. Akenes an- 
gulate, with large epigynous disc. Pappus 
coroniform, or 0.—2¢. Flowers yellow. 
1. T. campHoratom Less. Suffrutescent. 
Sand dunes near San Francisco. Summer. 
55. Artemisia L. Wormwoop. Sacz-Brusu. 
Aiqualis. Superfiua, Necessaria. Ray 
flowers tubular. Scales of involucre dry, with 
