D Flashcards
Deciduous
falling off, as leaves of non-evergreen trees; or deciduous bark as in Eucalyptus
Decumbent
lying along the ground with end rising (applied to stems)
Decurrent
the blade or stalk of the leaf continued down the stem in raised lines or narrow wings.
Decussate
(of leaves) opposite and successive pairs at right angles to each other
Defexed
bent downwards
Dehiscent
opening when ripe (applied to fruits).
Deltoid
the shape of an equilateral triangle
Denticulate
finely toothed
Dichasial
as of growth or an inflorescence, e.g. dichasial cyme; the growing point ends in a flower bud. Two new growing points. which in turn end in flower buds. develop from opposite sides below the terminal bud.
Dichotomous
divided into 2 branches which divide again into 2 and so on.
Didymous
found in pairs (fruits of Apiaceae). or divided into 2 lobes with little or no connective (anthers).
Didynamous
having 4 stamens in 2 pairs of unequal length
Digitate
a compound leaf whose leaflets spread from a common centre. like the fingers of a hand.
Dioecious
plant whose male and female parts grow on different individuals
Dipterous
two-winged or with two wing-like processes
Disc (disk)
an extension of the torus between the calyx and the gynoecium. e.g. in the Rutaceae. It may be cushion or ring-like or reduced to separate glands or scales; part of pollen-presenter as in Grevillea; circular plate between stamina I ring and valves in fruits of Eucalyptus.
Disc floret
the inner or central florets borne on the flattened penduncle in a radiate flowerhead in contrast to the surrounding ray florets( Asteraceae).
Discoid
having only tubular disc flowers as in some Asteraceae; or the stigma disc-shaped
Dissepiment
one or more vertical partitions dividing the ovary and fruit into 2 or more cells.
Distal
the far or free end of the la bell um in an orchid. Attached end is proximal
Distichous
regularly arranged in 2 opposite rows. as applied to leaves or flowers
Divaricate
spreading widely (almost at right-angles) in different directions from a common centre.
Dorsal
relating to the back. abaxial or under-surface of a leaf or flower.
Dorsifixed
anther on which the filament is attached at the back.
Dorsiventral
pertaining to an organ which has dorsal and ventral surfaces. e.g. a leaf
Drupe
an indehiscent stone fruit in which the pericarp is fleshy or leathery
Druplet
a small drupe
