228 FOUNDATIONS OF BOTANY 
Corollas yellow. 
Akenes truncate; pappus double, of chaff and bristles. 
Krigia, XII. 
Akenes columnar; pappus of tawny, rough bristles; stem 
scape-like. Hieracium, XIV. 
Akenes spindle-shaped, not beaked; pappus of plumed 
bristles. Leontodon, XV. 
Akenes ovoid to spindle-shaped, long-beaked; pappus white, 
soft, and abundant. Taraxacum, XVI. 
Akenes nearly as in XVI; pappus tawny. 
Pyrrhopappus, XVII. 
Akenes flattened, beaked ; pappus soft, white, the hairs soon 
falling off separately ; leafy-stemmed herbs. 
Lactuca, XVIII. 
Akenes flattened, not beaked ; pappus abundant, soft, white ; 
leafy-stemmed, spiny-leaved herbs. Sonchus, XIX. 
I. BELLIS, L. 
Small herbs. Leaves usually all radical, petioled. Heads 
solitary, disk yellow, ray-flowers white or pink; involucre 
bell-shaped, bracts in 1 or 2 rows, green; receptacle conical. 
Ray-flowers many, in a single row, pistillate. Disk-flowers 
tubular, perfect, 4-5-toothed; forks of the style short, thick, 
tipped by roughened cones. Fruit flattened, obovate; pappus 
wanting. 
1. B. integrifolia, Michx. AMERICAN Daisy. A branching annual 
or biennial herb, 4-12 in. high. Upper leaves lanceolate or oblong, 
the lower ones obovate-spatulate. Heads borne on slender peduncles; 
rays violet-purple. Prairies, especially S.W. 
2. B. perennis, L. EnGiisH Daisy, Scorcu Daisy. A stem- 
less perennial. Leaves obovate-spatulate, smooth or hairy. Heads 
3] in. in diameter, very pretty, the rays delicate. Cultivated 
from Europe. 
II. ERIGERON, L. 
Herbs. Leaves usually sessile. Heads many-flowered, flat 
or nearly hemispherical, the rays numerous, narrow, pistillate. 
Scales of the involucre narrow and overlapping but little. 
