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INTRODUCTION TO BOTANY. 227
Mucro. A stiflfj straight terminal point to any part.
Hook, Hamiis, RosteUum, Uncus, A crooked point.
Glochis. Fine, stiff hair, with branches bent back.
Sting, Stimulus. Fine hair, rather stiff, causing an itching
when touched. Urtica.
1[ Scale, Sqtiama, — lepis. A small, membranaceous, or
scarious appendage to any part.
Chaff, Palece. Small scales intermixed among flowrets
or seeds.
Slriga. A narrow, long scale, approaching to a hair.
CHARACTERS.
The authors of the Linnsean school have introduced
the uses of characters to denote terms that often occur.
The following are those most usually employed, as being
found in most printing-houses, and not requiring any extra
expense of casting on purpose.
0. An annual plant; because the earth takes a year to
perform its motion round the sun.