(98 ) 
6. M. riuires Gray. Ray-flowers short, in- 
conspicuous; pappus 0; disc-flower solitary. 
@©.—Antioch. Spring. 
All the species covered by a resinous exu- 
dation of strong, generally disagreeable odor. 
Recommended by the old settlers in affections 
of the urinary organs. 
88. Hemizonia DC. TAR-WEED. 
Necessaria. Superflua. Ray-fiowers ligu- 
late, dentate. Involucre l1-seriate, with con- 
cave scales embracing the ray-akenes. Recep- 
tacle flat, naked in the center, with a row of 
pales between disc and ray or sometimes 
throughout. Akenes of the ray convex exter- 
nally, flat internally; pappus of the ray 0; 
pappus of the disc scaly, aristate, plumose or 
0.—@. Viscid, resinous herbs; flowers yellow, 
white. 
1. H. Luzutmrouria DC. Only the ray- 
akenes developed, these obovate, triangular; 
terminal area depressed; rays 3-lobed, fre- 
quently white.—@©. San Francisco. Summer. 
2. H. macrapenta DC. Ray-flowers numer- 
ous with short ligule. Ray-akenes turgid, 
gibbose, the gibbosity pushing the terminal 
area to the inner angle so that the area appears 
lateral; receptacle conical; leaves not pungent; 
flowers always yellow.—©. Tamalpais. Con- 
tra Costa. Autumn. 
