Aquatic, Wetland and Invasive Plant Glossary
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Click one of the letters above to be taken to a page of all terms beginning with that letter.
- day neutral plants search for term
- - plants that flower regardless of day length.
- deciduous search for term
- - a. (L. deciduus, that which falls down) falling after completion of the normal function.
- decimeter search for term
- - (dm), 3.973 inches, 10 cm, or 0.1 m.
- decumbent search for term
- - a. (L. decumbere, to lie down) trailing on the ground and rising at the tip, as some stems.
- decurrent search for term
- - a. (L. decurrere, to run down) extending downward, applied usually to leaves in which the blade is apparently prolonged downward as two wings along the petiole or along the stem.
- dehiscence search for term
- - n. (L. dehiscere, to gape) opening and shedding contents; said of stamens and fruits.
- dehisces search for term
- - vt., to burst or split open, as the seed capsules of plants.
- deltoid search for term
- - a. (Gr. delta, and eidos, form) shaped like the Greek letter delta; triangular in outline.
- dentate search for term
- - a. (L. dens, a tooth) toothed, with large saw-like teeth on the margin pointing outward, not forward.
- denticle search for term
- - n. (L. denticulus, little tooth) a small tooth or toothlike projecting point.
- denticulate search for term
- - a., having small teeth; finely dentate.
- diadelphous search for term
- - a. (from di-, twice, and Gr. adelphos, brother; -ous) in two sets as applied to stamens when in two, usually unequal, sets.
- dichotomous search for term
- - a. (Gr. dichotous, a cutting in two) having or consisting of a pair or pairs; paired.
- digitate search for term
- - a. (L. digitus, finger) having fingerlike divisions, as some leaves.
- dimorphic search for term
- - a. (Gr. dimorphos, having two forms) having two forms.
- dioecious search for term
- - a. (Gr. di, two; oikos, house) said of a kind of plant having unisexual flowers, the male and female flowers on different individual plants.
- diploid search for term
- - a. (Gr. diploos, double; eidos, form) having twice the number of chromosomes normally occurring in a germ cell.
- disc flowers search for term
- - the radially symmetrical flowers of the head in Compositae, as distinguished from the ligulate ray flowers.
- discoid search for term
- - a. (Gr. diskos, a disk) having the form of a disk; discoid flower; a compound flower not radiated but with tubular florets.
- distal search for term
- - a. (L. distare, to stand apart) farthest away from the point of attachment or origin.
- distichous search for term
- - a. (Gr. distichos, having two rows) two-ranked; in the case of plants with alternate leaves, the arrangement is such that 1st is directly below the 3rd.
- divaricate search for term
- - vt. (L. divaricare, to spread apart) to branch or spread widely apart.
- divergent search for term
- - a. (L. divergere, to bend away) separated from one another, having tips further apart than the bases
- diverticulate search for term
- - a. (L. divertere, to turn aside) having short offshoots approximately at right angles to axis.
- divided search for term
- - a. (L. dividere, to divide) referring to the blade of an appendage when it is cut into distinct divisions to, or almost to, the midvein.
- dorsal search for term
- - a. (L. dorsum, the back) pertaining to the back; the surface turned away from the axis.
- down search for term
- - n. (ME. down, downe, down; probably of Scandinavian origin) fine, soft feathers; soft, fine hair.
- downy search for term
- - a., covered with short, fine hairs.
- drupe search for term
- - n. (Gr. dryppa, an overripe olive) a fleshy or pulpy fruit with the inner portion of the pericarp hard or stony and enclosing the seed; usually 1-locular and 1-seeded, sometimes more than 1-locular and more than 1-seeded.