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placentation |
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CHARACTER |
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Disposition of the placenta(e) within an ovary. |
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placentiform |
= placenta-shaped |
solid shape |
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Thickly disciform (discoid); like the generalized shape of a human placenta. |
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plaited 1 |
= pleated, plicate |
solid shape |
foliaceous structure |
Having alternately adaxial and abaxial lengthwise folds, resembling a fan. |
|
plaited 2 |
= pleated, plicate |
vernation |
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Having alternately adaxial and abaxial lengthwise folds, resembling a closed fan. |
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plane shape |
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CHARACTER |
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Overall two-dimensional form or aspect(s) thereof. Overlaps conceptually with architecture, arrangement, habit, insertion, orientation, and position. |
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planoconcave |
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solid shape |
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Relatively thin with opposite broad faces, one plane and one concave. |
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planoconvex |
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solid shape |
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Relatively thin with opposite broad faces, one plane and one convex. |
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plantlet |
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STRUCTURE |
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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. |
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plated |
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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. |
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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. |
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pleated 1 |
= plaited, plicate |
solid shape |
foliaceous structure |
Having alternately adaxial and abaxial lengthwise folds, resembling a fan. |
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pleated 2 |
= plaited, plicate |
vernation |
|
Having alternately adaxial and abaxial lengthwise folds, resembling a closed fan. |
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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. |
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pliable |
= flexible, pliant, supple |
texture |
|
Able to bend over its length and/or breadth without structural disruption. |
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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. |
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pliestesial |
|
duration |
plant |
Perennial and monocarpic, living several to many years before reproducing sexually, dying promptly thereafter. |
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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. |
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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. |
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pluri… |
= many-…, multi…, poly… |
prefix |
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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-…). |
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pneumatophore |
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STRUCTURE |
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A structurally and functionally specialized root serving as an aboveground aerating organ; found in some woody taxa of wet habitats, notably some mangroves. |
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polished |
= glossy, laevigate, lustrous, shining, shiny |
reflectance |
|
Uniformly reflecting a high proportion of incident light at all angles. |
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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. |
