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Term Definition
Bud scale A reduced leaf that encloses a bud. Terminal and lateral buds. Photo S. A. Mori.
Bud scale Bracts that subtend either a vegetative or a reproductive bud. Bud scales of Acer saccharum. Photo by M. Rothman.
Nectary scale A appendage (bracteole-like) located between the flowers of some Capparidaceae upon which the nectary gland (= nectary) is located. Flower with petals removed of Quadrella quintanarooensis. Photo by S. A. Mori.
Peltate scale A scale attached to a stalk by its lower surface rather than its margin; for example, the abaxial and adaxial surfaces of the leaves of Dendrobangia boliviana, the leaves of species of Duguetia, and the leaves of species of Croton and other species of Euphorbiaceae, and many species of Capparidaceae may have peltate scales. Peltate leaf blade scales. Photo by S. A. Mori.
Scale Any thin, scarious bract or bracteole (usually representing a vestigial leaf found along the stems of some achlorophyllous plants such as species of Voyria (Gentianaceae); the bracteole subtending a flower of Cyperaceae; in pteridophytes, similar structures most commonly found on the rhizomes and stipe and less commonly on the fronds. Voyria rosea. Photo by S. A. Mori.