|
dichotomous |
|
architecture |
axis |
Branching by division of the apical meristem producing two coordinate but not necessarily equal derivatives from each division. |
|
diclesium pl. diclesia |
< accessory fruit, anthocarp |
nominative |
fruit |
An achene enveloped by a persistent, free perianth base. |
|
diclinous |
> dioecious, monoecious |
reproduction |
taxon |
Having all flowers functionally unisexual. See also monoclinous (synoecious). |
|
didynamous |
|
architecture |
flower, androecium |
Diadelphous with two stamens in each set. See also tetradynamous. |
|
diffuse |
|
architecture |
plant, stem |
Having branches remote and divergent to divaricate. |
|
diffuse root |
> fibrous root |
STRUCTURE |
|
Any member of a dense system of adventitious, slender roots that arise from the base of a main stem and functionally replace an evanescent primary root. |
|
diffuse-porous |
|
porosity |
|
Homogeneously porous, the vessels not differentially disposed by size or number. |
|
diffuse-rooted |
> fibrous-rooted |
architecture |
plant |
Having a dense system of adventitious, slender roots that arise from the base of the main stem and functionally replace an evanescent primary root. See also taprooted. |
|
digamous |
|
reproduction |
inflorescence |
Bearing flowers of two differing sexual constitutions; esp. in Asteraceae (Compositae). |
|
digitate |
= palmate |
architecture |
foliaceous structure |
Compound with one order of leaflets all inserted at a common point and diverging from one another; or lobed (cleft, divided, parted, segmented), incised or ribbed in a similar hand-like pattern. Unless qualified to indicate otherwise, this term usually is understood to mean "palmately once-compound." See also …palmate, palmatifid, palmatipinnate, ternate. |
|
…digitate |
= …palmate |
architecture |
foliaceous structure |
Compound with the number of orders of leaflets indicated by the prefix, each order digitate; as in tridigitate. |
|
dilate(d) |
|
solid shape |
elongate structure |
Narrow at one end and broadening toward the other; esp. when essentially terete at the narrow proximal end and seemingly flattened distally, as some anther filaments. |
|
dimidiate |
|
plane shape |
|
Halved, figuratively; bilaterally asymmetric, nearly or wholly lacking one side as implicitly compared with some corresponding bilaterally symmetric structure, real or imagined. |
|
dimidiate |
|
solid shape |
|
Halved, figuratively; bilaterally asymmetric, nearly or wholly lacking one side as implicitly compared with some corresponding bilaterally symmetric structure, real or imagined. |
|
dioecious |
< diclinous |
reproduction |
taxon |
Having all flowers or spikelets functionally unisexual, each plant having only staminate or only pistillate types. See also monoecious. |
|
diplecolobal |
|
arrangement |
cotyledons |
Incumbent but with the cotyledons folded together twice or more, the folds transverse. |
|
diplostemonous |
|
architecture |
flower, androecium |
Having the stamens dicyclic, the proximal whorl with members directly above the sepals, the distal whorl with members directly above the petals. See also obdiplostemonous. |
|
diplotegium pl. diplotegia |
|
nominative |
fruit |
A pyxis with accessory tissue adnate to the pericarp; derived from an inferior ovary. |
|
disarticulating |
|
architecture |
axis |
Articulate(d) and with the main portions of the whole separating at the joints upon maturity or senescence. |
|
disc 1 var. disk |
|
STRUCTURE |
|
Any distinct, annular to discoid structure produced from or borne upon a floral receptacle between or basal to any of the sets of floral organs; usually fleshy, often nectariferous. |
|
disc 2 var. disk |
|
STRUCTURE |
|
Collectively, the disc florets of a capitulum (head), or the surface presented by them. |
|
disc floret |
|
STRUCTURE |
|
A floret that has an actinomorphic corolla, is bisexual, functionally staminate, or functionally pistillate, and is borne in a radiate, discoid, disciform, or radiant capitulum (head) interior (distal) to any peripheral series of differing florets that may be present; in Asteraceae (Compositae). |
|
discal |
|
insertion |
|
Upon or otherwise directly associated with the floral disc. |
|
discal |
|
position |
|
Upon or otherwise directly associated with the floral disc. |
|
disciform 1 |
= discoid |
solid shape |
|
Relatively thin with two round, plane or convex, opposite broad faces and a rounded circumferential edge; like a disc. See also lenticular (biconvex, lens-shaped), meniscoid, placentiform (placenta-shaped), trochlear (pulley-wheel-shaped). |
