wo _cocci_ or closed carpels.

_Dicotyls_, 23.

_Dicotyledonous_ (embryo), having a pair of cotyledons, 23.
_Dicotyledonous Plants_, 23, 182.

_Didymous_, twin.

_Didynamous_ (stamens), having four stamens in two pairs, 100.

_Diffuse_, spreading widely and irregularly.

_Digitate_ (fingered), where the leaflets of a compound leaf are all
borne on the apex of the petiole, 58.

_Digynous_ (flower), having two pistils or styles, 105.

_Dimerous_, made up of two parts, or its organs in twos.

_Dimidiate_, halved; as where a leaf or leaflet has only one side
developed.

_Dimorphism_, 117. _Dimorphous_, _Dimorphic_, of two forms, 117.

_Dioecious_, or _Dioicous_, with stamens and pistils on different
plants, 85.

_Dipetalous_, of two petals.

_Diphyllous_, two-leaved.

_Dipterous_, two-winged.

_Diplo-_, Greek for double, as _Diplostemonous_, with two sets of
stamens.

_Disciform_ or _Disk-shaped_, flat and circular, like a disk or quoit.

_Discoidal_, or _Discoid_, belonging to or like a disk.

_Discolor_, of two different colors or hues.

_Discrete_, separate, opposite of concrete.

_Disepalous_, of two sepals.

_Disk_, the face of any flat body; the central part of a head of
flowers, like the Sunflower, or Coreopsis, as opposed to the ray or
margin; a fleshy expansion of the receptacle of a flower, 113.

_Disk-flowers_, those of the disk in Compositae.

_Dissected_, cut deeply into many lobes or divisions.

_Dissepiments_, the partitions of a compound ovary or a fruit, 108.

_Dissilient_, bursting in pieces.

_Distichous_, two-ranked.

_Distinct_, uncombined with each other, 95.

_Dithecous_, of two thecae or anther-cells.

_Divaricate_, straddling; very widely divergent.

_Divided_ (leaves, &c.), cut into divisions down to the base or midrib,
55.

_Dodeca_, Greek for twelve; as _Dodecagynous_, with twelve pistils or
styles, _Dodecandrous_, with twelve stamens.

_Dodrans_, span-long.

_Dolabriform_, axe-shaped.

_Dorsal_, pertaining to the back (_dorsum_) of an organ. _Dorsal
Suture_, 106.

_Dotted Ducts_, 148.

_Double Flowers_, where the petals are multiplied unduly, 79.

_Downy_, clothed with a coat of soft and short hairs.

_Drupaceous_, like or pertaining to a drupe.

_Drupe_, a stone-fruit, 120. _Drupelet_ or _Drupel_, a little drupe.

_Ducts_, the so-called vessels of plants, 134.

_Dumose_, bushy, or relating to bushes.

_Duramen_, the heart-wood, 142.

_D