39 
Bracts, or some of them, bristle-like, ending in a 
hooked point, so as to form a “ bur,’”’ which clings | 
readily. J 
All the heads bur-like; leaves wide, with shallow teeth 
or none. ; 
Ar'ctium Lap’pa. Surdock. 
Only the lower heads bur-like; leaves strongly. 
toothed. 
Xan'thium Strumarium. Lurweed. 
Bracts ending in a straight spine (not hooked), or flat and 
with the tip toothed or fringed. 
ae 
Ney ae 
Centaurea. 
GROUP IV. 
The outer, strapshaped florets yellow. 
Bracts narrow and equal in length, with or without a 
( few minute outer ones. 
Flowering stem bearing only very small, entire, 
woolly leaves, root-leaves large and roundish. ) 
Tussila'go Farfara. Co/ts/oot. 
Flowering stem bearing well-formed leaves. 
Outer, strap-shaped florets very narrow and- 
[ numerous (Over 30). ] 
L Doronicum. 
Strap-shaped florets not more than 20, usually~ 
rather wider. J 
L Sene'cio. 
Bracts of different lengths, overlapping each other like 
scales, or large and leaf-like. 
Pappus absent; outer florets very wide. 
Upper leaves with few, entire divisions ; no scales 
f among the florets. } 
Chrysan'themum seg’etum Corn Marigold. 
~Leaves deeply divided into several toothed seg- 
ments; florets mixed with scales. | 
An'themis tincto’ria. Yellow Chamomile? 
Fruits with a pappus; outer florets narrow. 
es strap-shaped florets very numerous, aes 
than 20. 
L Inula ~ 
Outer, strap-shaped florets from 6 to 12 only; the. 
flower-heads small and numerous. | 
q Solida’go Virga-aurea Goldenrod ss 
Outer florets blue, white, red, or purple. 
SS 
