8 DIVIDED LEAVES. 
known. The leaf of the Lilac for example, is of a form 
which is one of the most simple, as the blade is entire 
(pl. 4. f. 1), that is the margins are not divided or 
notched in any way; while the leaf of the Vine (pl. 2. 
f. 5.), Ivy, Oak, Dandelion, Mallow, Gooseberry, 
Hawthorn, &c. are examples of divided leaves; the 
margins or edges of these leaves being more or less cut, 
or divided, so as to give the blade the appearance of 
being lobed, or parted into different portions. The 
entire leaf may vary in its form, as in the Lily, in 
which it is long and narrow, or it may be round or 
nearly so, as in the Garden Nasturtium (pl. 11. f. 2.). 
The following are some of the more frequent forms 
of the divided leaf, or rather of the entire leaf passing 
into the divided leaf; when the margin is divided into 
teeth like those of a saw, the points being directed 
towards the end or apex of the leaf, it is termed a 
serrated leaf, or cut like a saw: as in the Elm, Nettle, 
&e. (pl. 2. f. 6. s.). When the margin is furnished 
with regular cuttings, that is not pointing to either end 
of the leaf, it is then called a crenate, or notched leaf, 
as in the Dead Nettle (f. 6. ¢.). When the cutting of 
the margin is very small, the leaf is then said to be 
toothed (f. 6. t.); and when the margin is cut irregu- 
larly as to size and distance, it is termed a jagged leaf. 
When the margins of the leaf are divided still more 
deeply, the leaf becomes lobed, as in the Vine (f. 5.), 
Ivy, Currant, Gooseberry, Prickly fruited Poppy, (f-7.). 
In the Fennel, &c. the whole leaf loses its margins, 
and presents only a kind of green framework, or 
skeleton; it is then called a decompound leaf, (f. 8.) 
