£4 PRINCIPLES OF BOTANY, ETC. 
serratum, &c. a nearly heart-shaped leaf, an almost 
ovate leaf, a leaf somewhat serrated, &c. When 
the leaf answers the description, but seems to be 
inverted, that is, that the apex resembles what the 
base should be, and the base 1s like what the apex 
should be, we use the word od, e. g. obovatum, ng. 
14. ebcordatum, 5c. 
With regard to the particular parts of leaves, we 
have still to notice, 
1. The lobe, ia the segment of a leaf which 
is round at the apex, as in Acer. 
2, The segment, (/acinia), the segment of a leaf 
that runs into an angle at the point, and is uneven. 
3. The little leaf, (foliolum), the little leaves that 
make part of a digitated, quinate, &c. leaf, are call- 
ed foliola or leafets. 
4, The leaf of a bi-pimnated leaf, (pinna), each 
simply pinnated leaf of a bi-pinnated leaf is called 
pina. 
5. The leafet of a pinnated leaf, (pinnula), means 
1e of the leafets of which the pinnated leaf is com- 
posed. 
6, ‘Fwo-paired pinnated, (pinnatum bisugum), when. 
the pinnated leat has only two pair of opposite leaves, 
(trijugum), when it has three pair, eernigun, 
when it has four pair, &c, 
Te Angle, (angulus), xespects the point of a la- 
cinia or seement. 
8. Indentation, (s/nus), respects the hollow in- 
terstice between the segments of the leaf when it is 
round, 
Each 

