|
decurved |
|
orientation |
|
Curving abaxially. See also incurved. |
|
decussate |
|
arrangement |
|
Opposite with successive pairs radially oriented at right angles to one another, thus polystichous with four equidistant ranks. |
|
deflexed |
= reflexed |
orientation |
|
Abruptly bent outward (abaxially), downward, or backward at some point along its length. |
|
dehiscence |
|
CHARACTER |
|
Mode of opening (splitting or forming apertures). |
|
dehiscent |
|
dehiscence |
|
Splitting or forming one or more apertures at maturity, the contents thereby released for dispersal. |
|
deliquescent 1 |
|
architecture |
axis, laminar vein |
Branching laterally and repeatedly such that the initial axis loses its prominence over the length of the structure and seems to dissolve into the succesive orders of branches. See also excurrent. |
|
deliquescent 2 |
|
texture |
|
Delicately fleshy and liquifying at maturity or with pressure; e.g., petals of Tradescantia (Commelinaceae). |
|
deltate |
|
plane shape |
|
Equilaterally triangular, broadest at the base, and regularly attenuate to an angular apex. See also obdeltate. |
|
deltoid |
< three-angled, trigonous, triquetrous |
solid shape |
|
Three-angular (trigonous, triquetrous), broadest at the base, and regularly attenuate to an angular apex; equilaterally pyramidal with three lateral faces. See also obdeltoid. |
|
dendritic |
= tree-like |
architecture |
|
Like the branched axial structure of a tree. |
|
dens pl. dentes |
= tooth |
STRUCTURE |
|
One of a series of regularly spaced, angular, marginal convexities oriented more or less perpendicular to the generalized perimeter of a laminar structure. See also crena (scallop), crenule (scalloplet), sawtooth, sawtoothlet, toothlet. |
|
dentate |
= toothed |
margin |
|
Having regularly spaced, angular convexities oriented more or less perpendicular to the generalized perimeter. See also crenate (scalloped), crenulate (small-scalloped), denticulate (small-toothed), serrate (sawtoothed), serrulate (small-sawtoothed). |
|
denticulate |
= small-toothed |
margin |
|
Finely dentate (toothed). See also crenate (scalloped), crenulate (small-scalloped), serrate (sawtoothed), serrulate (small-sawtoothed). |
|
depressed |
< flattened |
solid shape |
|
Flattened distally, perpendicular to the longitudinal axis, as though pressed from the top, the external surface otherwise basically convex. Often used in combination with some other term that describes the overall shape exclusive of ("before") flattening, e.g., depressed-globose. See also compressed (complanate), obcompressed. |
|
derivation |
|
CHARACTER |
|
Ontogenetic origin. |
|
descending |
= downcurved |
orientation |
lateral structure |
Salient at its base and then curving downward or backward. |
|
determinate |
|
development |
|
Having the terminal (central, apical, or distal) portion differentiating first and the lateral (peripheral, basal, or proximal) portions later, development thus proceeding sequentially downward or outward, growth of the whole thereby organizationally limited. |
|
development |
= ontogeny |
CHARACTER |
|
Mode or pattern of growth and differentiation. |
|
dextrorse |
= rightward |
orientation |
|
Directed to the right, relative to the direction of growth along an explicit or implicit axis of reference. See also sinistrorse (leftward). |
|
diacytic |
= caryophyllaceous |
architecture |
stomate |
Having two subsidiary cells that together surround it, their common wall oriented perpendicular to its long axis. |
|
dialypetalous |
= apopetalous, choripetalous, polypetalous |
architecture |
flower, perianth, corolla |
Having two or more distinct petals; having the petals unfused. |
|
dialysepalous |
= aposepalous, chorisepalous, polysepalous |
architecture |
flower, perianth, calyx |
Having two or more distinct sepals; having the sepals unfused. |
|
diamond-shaped |
= rhomboid |
solid shape |
|
Transversely square, broadest and longitudinally angular at the middle, regularly attenuate to angular ends, all faces essentially plane; like the stylized shape of a diamond. |
|
diaphragmed |
|
architecture |
pith |
Uninterrupted by cavities but heterogeneous in texture at axis maturity, with sectors of spongy tissue separated by relatively thin transverse plates of denser tissue that occur at the nodes or are otherwise regularly spaced along the axis. |
|
dichasiate |
|
architecture |
inflorescence |
Comprising one or more simple or compound dichasia. See also cincinnate, cymose, cymulose, helicoid-cymose, monochasiate, scorpioid-cymose. |
