4 PRINCIPLES OF BOTANY, ETC. 
is divided into numerous small lobes which lie close 
upon one another, and between which there is ofteri 
a thread. | 
2. Pinnated, (pinnata), a frons which is formed 
hke a pinnated leaf, § 22. No. 97. | 
§ 25. 
The leaves of mosses are in their structure not 
different from those of plants. No compound leaves 
have been observed in them, and, in very few, deep 
incisures. The cloathing of the leaves is either 
smooth (g/abrum), or hairy ( pilosum), and then there 
is commonly only a hair at the point of each leaf. 
Cartilaginous or succulent leaves have not yet been | 
discovered among them. ‘The leaves are generally 
sessile ; none with foot- stalks, except in one species, 
have yet been found. 
The leaves of the Musci hepatici are distinguished 
by the same terms with other plants, except com- 
pound leaves, which are wanting tothem. When 
the leaves of the Musci hepatici et frondosi have 
very deep lacinie, they are not called /folia but 
frondes. 
§ 26. 
Under the name of Props, (fulcra), we under- 
stand those parts which differ from the stem, leaves, 
yoot and flower: but serve for keeping the plant 
erect, for its clothing, defence, or other purposes. 
Such are the following: Ramentum, Bractea, Va- 
gina, Spatha, Ochrea, Ascidium, Ampulla, Ligula, 
Invo- 
