In botany a scale or
squama is a small, thin, usually dry,
often appressed plant structure,
such as any of the protective leaves
that cover a bud or the
bract that
subtends a
flower in a sedge or a thin flake,
an exfoliation of dead epidermis
shed from the surface of the
epidermis.
Scales
or scale leaves are also the
fleshy leaves of a bulb.
The body of the bulb is made up of
concentric layers of fleshy scales which are
modified leaves. The scales
are food and
waterstorage organ that overlap
and cover the bud.
A
scale or peltate hair is a common type of
trichome a plate or shield-shaped
cluster of cells attached directly to the
surface or borne on a
stalk of some kind.
Scale is a diseased
condition of plants caused by
scale
insects that attaches to plants and sucks plant fluids for nutrition. It
coats itself with a covering (hence scale) that makes it quite resistant
to pesticides, which are only effective against them when they are in
the juvenile crawler stage. Scale, however can be controlled with
horticultural oil, which suffocates them, or through biological
controls.
A
scale or Scale-like leaves is a small sharp-pointed
A
bud scale is a kind of specialized 
Scales
or scale leaves are also the 
A
scale or peltate hair is a common type of
