50 ELEMENTS OF BOTANY. 
or naked at the summit. Aromatic or ill-scented herbs, with 
the leaves finely pinnately divided. 
(A. coTULA), MAYWEED, DoG-FENNEL. Heads small, produced 
all summer, with yellow disk and rather short white neutral rays ; 
leaves irregularly cut into very many narrow segments. A low, 
offensive-smelling annual weed, by roadsides and in barnyards. 
Ill. CHRYSANTHEMUM, CHRYSANTHEMUM, 
OX-EYE DAISY. 
Heads nearly as in the preceding genus, except that the 
ray-flowers are pistillate. Perennials with toothed pinnately 
cut or divided leaves. 
a. (C. LEUCANTHEMUM), OX-EYE Daisy, WHITEWEED, BULL’s- 
EYE, SHERIFF Pink. Stem erect, unbranched or nearly so, 1-2 ft. 
high ; root-leaves oblong-spatulate, petioled, deeply and irregularly 
toothed ; stem-leaves sessile and clasping, toothed and cut, the upper- 
most ones shading off into bracts. Heads terminal and solitary, 
large and showy, with a yellow disk and many white rays. <A trouble- 
some but handsome perennial weed. 
b. (C. FRUTESCENS), MARGUERITE. Erect, branching, woody 
below, smooth and with a pale bloom ; divisions of the leaves linear, 
with the uppermost leaves often merely 3-cleft bracts ; heads long- 
peduncled, showy, with a yellow disk and large, spreading white 
rays. Perennial, cultivated in greenhouses, from the Canary Islands. 
IV. SENECIO, GROUNDSEL. 
Heads many-flowered; ray-flowers pistillate or wanting ; 
involucre usually of a single row of equal, erect scales. 
Receptacle flat and destitute of scales or chaff. Akenes 
tufted with abundant, soft, hair-like bristles. Flowers in 
most cases yellow. 
(S. AUREUS), GOLDEN RaGwort, SQUAW-WEED, SNAKE-ROOT. 
Sometimes covered with cottony wool when young, sometimes smooth, 
1-3 ft. high ; root-leaves varying greatly in shape in different varieties, 
long-petioled ; lower stem-leaves obovate, with deep and narrow lobes 
toward the base ; upper stem-leaves lanceolate, pinnately cut, sessile 
or with a somewhat clasping base ; heads rather small, with 8-12 
rays, in an umbel-shaped corymb. Many well-defined varieties are 
known. Perennial. 
