Flora of North America Glossary
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| Term | Synonyms | Category | Limitation | Definition |
|---|---|---|---|---|
| placentation | CHARACTER | Disposition of the placenta(e) within an ovary. | ||
| placentiform | = placenta-shaped | solid shape | Thickly disciform (discoid); like the generalized shape of a human placenta. | |
| plaited 1 | = pleated, plicate | solid shape | foliaceous structure | Having alternately adaxial and abaxial lengthwise folds, resembling a fan. |
| plaited 2 | = pleated, plicate | vernation | Having alternately adaxial and abaxial lengthwise folds, resembling a closed fan. | |
| plane shape | CHARACTER | Overall two-dimensional form or aspect(s) thereof. Overlaps conceptually with architecture, arrangement, habit, insertion, orientation, and position. | ||
| planoconcave | solid shape | Relatively thin with opposite broad faces, one plane and one concave. | ||
| planoconvex | solid shape | Relatively thin with opposite broad faces, one plane and one convex. | ||
| plantlet | STRUCTURE | A juvenile, complete plant produced asexually by budding, as from the leaf margin in some Kalanchoë (Crassulaceae); this term is usually applied only while such vegetatively produced offspring remain attached to the plant of origin. | ||
| plated | relief | bark | Fissured in a more or less regular, anastomosing pattern with distinct, relatively large, undisturbed sectors intervening, the latter ultimately falling away more or less intact after attaining considerable thickness. | |
| platter-shaped | = scutellate, scutelliform | solid shape | Relatively thin with opposite broad oval faces, shallowly concave-convex; like a serving platter. See also buckler-shaped (scutate, scutiform), which is not clearly distinct in its application. | |
| pleated 1 | = plaited, plicate | solid shape | foliaceous structure | Having alternately adaxial and abaxial lengthwise folds, resembling a fan. |
| pleated 2 | = plaited, plicate | vernation | Having alternately adaxial and abaxial lengthwise folds, resembling a closed fan. | |
| pleurorhizal | = accumbent | arrangement | cotyledons | Having the two cotyledons facing and parallel (adaxial surfaces contiguous) and recurved together, one lateral edge of each abutting the hypocotyl and radicle. |
| pliable | = flexible, pliant, supple | texture | Able to bend over its length and/or breadth without structural disruption. | |
| pliant | = flexible, pliable, supple | texture | Able to bend over its length and/or breadth without structural disruption. | |
| plicate 1 | aestivation | Valvate with each member strongly infolded longitudinally. | ||
| plicate 2 | = plaited, pleated | solid shape | foliaceous structure | Having alternately adaxial and abaxial lengthwise folds, resembling a fan. |
| plicate 3 | = plaited, pleated | vernation | Having alternately adaxial and abaxial lengthwise folds, resembling a closed fan. | |
| pliestesial | duration | plant | Perennial and monocarpic, living several to many years before reproducing sexually, dying promptly thereafter. | |
| plumose | = feather-shaped | solid shape | Having a slender central axis bearing two opposite ranks of numerous, closely proximate, ascending, very slender branches or appendages; resembling the generalized form of a feather. | |
| plumule | = epicotyl | STRUCTURE | A distinguishable nascent shoot developed in the embryo in some taxa, consisting of a shoot axis with unexpanded internodes and one or more leaf primordia, being that portion of the embryo above the level of cotyledon insertion; the primordial shoot, when developed by the embryo within a seed; the first bud of a spermatophyte, when developed by an embryo within the seed. In other taxa the shoot is represented in the embryo only by a quiescent apical meristem at the summit of the embryonic axis. | |
| pluri… | = many-…, multi…, poly… | prefix | Indicating presence of or constitution by a relatively large number of entities of the type denoted by the term's stem; as in plurilocular, pluriseriate. See also oligo… (few-…). | |
| pneumatophore | STRUCTURE | A structurally and functionally specialized root serving as an aboveground aerating organ; found in some woody taxa of wet habitats, notably some mangroves. | ||
| polished | = glossy, laevigate, lustrous, shining, shiny | reflectance | Uniformly reflecting a high proportion of incident light at all angles. | |
| pollen | STRUCTURE | Collectively, the spores or grains produced within the thecae of anthers, each containing a very small microgametophyte (or its evolutionary homologue); serving as disseminules from which microgametes are released after transport to a receptive micropylar pollen droplet (in Pinophyta) or stigma (in Magnoliophyta) by a variety of vectors, notably wind, water, insects, bats, and birds. |
Displaying 1751-1775 of 2673