CICHOEIAOE.ffiJ. 221 



1. H. GLABBA, L. Annual, glabrous, 1 ft. high more or less: leaves 

 in a depressed radical tuft, oblanoeolate, obtuse, sinuate-toothed: scape 

 branching: ligules and expanded head small: outer achenes truncate at 

 summit, the inner tapering to a long slender beak: pappus of capillary 

 bristles intricately plumose below the nearly naked apex, and of some 

 fine short naked outer ones. — Very common in all open grounds. 



2. H. badioata, L. Twice as large as the preceding, perennial, hir- 

 sute: ligules long, and expanded heads 1 in. broad: achenes all rostrate. 

 — Common in shaded grassy ground at Berkeley, where it began to 

 appear only a few years since. 



6. UROPAPPUS, Nutt. Subacaulescent annuals, nearly or quite 

 glabrous, with laciniately cleft or pinnatifid leaves, and stout scapiform 

 monocephalous peduncles enlarged under the oblong-conic heads, these 

 always erect. Ligules short, in expansion surpassed by some of the 

 bracts of the oblong conic imbricated involucre. Achenes slender-fusi- 

 form, 8 — 12-ribbed, truncate at summit. Pappus of 5 scarious ample 

 bifid palese, with an awn or bristle arising from the notch. 



* Achenes brownish; pappus brownish, persistent. 



1. U. Lindleyi (DC), Nutt. Stoutish, X% ft. high or smaller: achenes 

 5 — 6 lines long, slightly narrowed toward the summit: pappus-palese 

 linear-lanceolate, 4 lines long, the awn very little shorter. — The most 

 common species. May, June. 



2. U. leucocarpus, Greene. Like the preceding in size, etc., but 

 achenes almost white, slenderly attenuate at summit, the narrow part 

 vacant, i. e., not filled by the seed; very light-brown palese and slender 

 awn each about 1% lines long. — With the preceding, but far less 

 common. 



3. U. Clevelandi, Greene. Smaller than the preceding, furfuraceous- 

 puberulent: achenes 3 lines long, not at all attenuate, the body, and also 

 the pappus, of a deeper brown; palese with a very short awn. — Plains at 

 the eastern base of Mt. Diablo, thence southward. April. 



4. U. Kelloggii, Greene. More slender than any of the preceding, 

 the scapes little enlarged under the heads: achenes slightly attenuate at 

 each end: palese of pappus only about 2 lines long, the awn somewhat 

 longer. — Toward the seaboard, and not common: near Tomales, etc. 

 April, May. 



* * Achenes black; pappus clear white, deciduous. 



5. U. linearifolius (DO.), Nutt. Stouter than any of the foregoing; 

 the numerous scapiform peduncles much dilated under the involucres: 

 blackish achenes almost rostrate-attenuate. Var. elatus. Slender and 

 tall, the stem (not rarely a foot high) and slender peduncles together 



