Flora of North America Glossary
Displaying 651-675 of 2673
| Term | Synonyms | Category | Limitation | Definition |
|---|---|---|---|---|
| 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). | |
| …dentate 1 | = …-toothed | apex | Generally truncate but with the number of antrorse, attenuate, distal lobes indicated by the prefix; as in tridentate. | |
| …dentate 2 | = …-toothed | margin | Having the number of orders of dentes (teeth) indicated by the prefix, one upon another; as in twice-dentate. See also …crenate (…-scalloped), …serrate (…-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). | |
| di… | = bi…, two-… | prefix | Indicating presence of or constitution by two entities of the type denoted by the term's stem; as in diadelphous, dicyclic, dimerous. See also individual entries for terms with this prefix whose meanings, at least in some applications, are more specific than usually indicated by such combination; and also double-… (bi…, twice-…). | |
| 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. | |
| dichasiiform | = dichasium-like | architecture | capitulescence, inflorescence | Resembling a dichasium, but not strictly such. |
| dichasium-like | = dichasiiform | architecture | capitulescence, inflorescence | Resembling a dichasium, but not strictly such. |
| dichasium pl. dichasia | nominative | inflorescence | Determinate and falsely dichotomous with each axial segment bearing a sessile terminal flower and either a pair of opposite pedicellate lateral flowers or a pair of opposite lateral branches. See also cincinnus, cyme, cymule, helicoid cyme, monochasium, scorpioid cyme. | |
| dichlamydeous | architecture | flower | Having a perianth differentiated into a distinct calyx (sepals) and corolla (petals). | |
| dichogamous | > protandrous, proterandrous, protogynous | maturation | bisexual flower | Having the androecium and gynoecium becoming functionally mature at different times. |
Displaying 651-675 of 2673