130 THE STORY OF PLANT LIFE 
really made up or composed of a number of flowers 
or florets associated together upon one disc. 
Of this large order, which contains more than 10 
per cent. of the known flowering plants, there cannot 
be less than ten thousand species, which are found in 
every part of the world. The Hawkweed group is, 
for example, found at high altitudes in most countries. 
The majority of them are herbaceous, but a very 
few are shrubs and trees, chiefly found in oceanic 
islands. 
They have been divided into two main groups, the 
Tubuliflore in which the flowers of the disc are not 
ligulate, and there is no latex, and the Ligulifloree, in 
which all the florets are ligulate and there is a latex. 
In the former amongst British subgroups are Hemp 
Nettle, Golden Rod, Daisy, Aster, Flea Bane, Cud- 
weed, Cottonweed, Marsh Cudweed, Elecampane, 
Xanthium, Burweed, Milfoil, Mayweed, Chrysan- 
themum, Wild Chamomile, Tansy, Wormwood, Colts- 
foot, Butter Bur, Groundsel, Carline Thistle, Burdock, 
the Thistles, Knapweed. 
In the second group are included Chicory, Bristly 
Oxtongue, Hawksbeard, Hawkweed, Dandelion, Wall 
Lettuce, Goat’s Beard. 
The habit in general is the rosette habit, with basal 
radical leaves and erect scapes. They have in this 
respect and in the composite flower head—which is 
rendered conspicious, with little expenditure on the 
part of each floret in the way of a corolla, and many 
flowers are fertilised in a short time by insects, as 
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