Flora of North America Glossary
Displaying 1326-1350 of 2673
| Term | Synonyms | Category | Limitation | Definition |
|---|---|---|---|---|
| lens-shaped 1 | = biconvex, lenticular | plane shape | Elongate, narrow, broadest at the middle, attenuate to acute ends, the sides convex; like the outline of a couble-convex lens viewed from its edge. | |
| lens-shaped 2 | = biconvex, lenticular | solid shape | Relatively thin with two round, convex, opposite broad faces intersecting acutely at the circumferential edge; like a double-convex lens. See also disciform (discoid), meniscoid. | |
| lenticel | STRUCTURE | A specialized, anatomically distinct structure within the periderm of a stem, consisting of comparatively spongy, sometimes suberized tissue distinct from others of the periderm; extending radially through the periderm and visible as a circular to elongate discontinuity in the color, texture, and/or relief of the outer surface of the stem; serving as a conduit for gas exchange between the stem interior and the atmosphere. | ||
| lenticular 1 | = biconvex, lens-shaped | plane shape | Elongate, narrow, broadest at the middle, attenuate to acute ends, the sides convex; like the outline of a double-convex lens viewed from its edge. | |
| lenticular 2 | = biconvex, lens-shaped | solid shape | Relatively thin with two round, convex, opposite broad faces intersecting acutely at the circumferential edge; like a double-convex lens. See also disciform (discoid), meniscoid. | |
| lentiginose | = dusty, lentiginous | coating | Covered with a more or less even deposit of minute, dry, macroscopically indistinguishable particles. See also pulverulent (granuliferous, powdery), which is not clearly distinct in its application. | |
| lentiginous | = dusty, lentiginose | coating | Covered with a more or less even deposit of minute, dry, macroscopically indistinguishable particles. See also pulverulent (granuliferous, powdery), which is not clearly distinct in its application. | |
| lepidote | = squamose; < scaly | pubescence | Bearing lepides (squamae). See also squamellose. | |
| lepis pl. lepides | = squama; < scale, trichome | STRUCTURE | A relatively thick, planate trichome. See also squamella. | |
| leptosporangiate | reproduction | Having relatively small sporangia each of which develops from a single initial cell that, by periclinal division, gives rise to an outer and an inner cell, the former then giving rise to the entire sporangium, including contents and sporangiophore, the latter contributing nothing to it; in some Polypodiophyta. | ||
| levering | habit | trichome | Forming part of a pappus and reflexing at maturity, thus helping to loosen the individual fruit (cypsela) from the capitulum (head); in Asteraceae (Compositae). | |
| liana | < vine | nominative | plant | Perennial with elongate ligneous stems that are flexible at least initially and that climb upon trees and shrubs. |
| lianous | < viny | habit | plant | Having elongate, ligneous stems that are flexible at least initially and that climb upon trees and shrubs. |
| lid | = operculum | STRUCTURE | A distal, cover-like portion of a structure whose main body is otherwise closed, transversely discontinuous with the main body around most of the circumference, or becoming partially or wholly separate by transverse dehiscence; as of a pitcher (ascidium), pollen grain, pyxis, or spore case (sporangium). | |
| lidded | = operculate | architecture | Having a lid (operculum). | |
| ligneous | = woody | texture | Of or resembling xylem (wood). | |
| ligulate 1 | = liguliferous | architecture | structure | Having a ligule. |
| ligulate 2 | architecture | floret | Bisexual with a zygomorphic corolla; in Asteraceae (Compositae). | |
| ligule 1 | STRUCTURE | A strap-shaped enation from or distal portion of a structure. | ||
| ligule 2 | STRUCTURE | An adaxial, distal enation from a leaf sheath, especially in most grasses (Poaceae) and sedges (Cyperaceae); usually unitary and membranous, sometimes instead consisting of a row of ciliate processes. See also hastula. | ||
| ligule 3 | STRUCTURE | A relatively small, attenuate, membranous, laminar enation from the adaxial surface of a leaf near its base; in Selaginella, Isoetes. | ||
| ligule 4 | STRUCTURE | The distal, relatively flat portion of the zygomorphic corolla of a ligulate floret, terminating in 5 teeth or lobes; in Asteraceae (Compositae). | ||
| liguliferous | = ligulate | architecture | structure | Having a ligule. |
| liguliflorous | architecture | capitulum (head) | Bearing florets that all are bisexual and have zygomorphic corollas; in Asteraceae (Compositae). | |
| liguliform | = lorate, strap-shaped | solid shape | Elongate and relatively thin with the opposite faces more or less plane and moderately narrow, their edges more or less straight and parallel over most of their length; resembling a strap. |
Displaying 1326-1350 of 2673