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cap cell |
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STRUCTURE |
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The single cell, or one of the several cells, forming the uppermost (distal) portion of an antheridial wall. |
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chaff 2 |
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STRUCTURE |
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Collectively, the glumes, lemmata, and paleae of mature spikelets; in Poaceae (Gramineae). |
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secund 2 |
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architecture |
stem |
Having the petioles oriented such that the main bodies of all the leaves lie to one side of the bearing stem. |
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catadromous |
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venation |
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Having the first lateral vein in each pinna or primary segment of the frond arise from its midvein on the side toward the base of the frond, the pinnule or secondary segment that it leads to often disproportionately larger than the next distal ones. |
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involute 1 |
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margin |
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Rolled adaxially. |
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coetaneous |
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maturation |
dissimilar structures |
Maturing concurrently. This adjective is frequently used to mean contemporary maturation of leaves and flowers, but without actually stipulating that those are the structures involved. Such usage is erroneous according to the construction and literal meaning of the term, which properly applies to structures, not to the taxon or plant. See also synanthous. |
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shoot 2 |
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STRUCTURE |
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A vascularized axis that is differentiated into nodes and internodes and that branches exogenously from the former, together with any non-axial structures borne from it. |
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lineolate 2 |
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relief |
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Finely lineate, the depressions or protrusions short and often irregularly oriented. |
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micropyle |
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FEATURE |
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The small pore in the integuments of an ovule at its apex, through which the pollen tube grows; or the corresponding aperture or scar in the coat of the seed that develops subsequently. |
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subpetiolar |
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position |
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Just below the point of petiole insertion. |
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berry |
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nominative |
fruit |
Indehiscent, few- to many-seeded, and derived from a single, simple or compound ovary; fleshy throughout except for the seeds. See also hesperidium, pepo. |
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strict |
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course |
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Lacking any curve or bend. |
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symmetric(al) 1 |
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solid shape |
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Divisible into essentially equal halves along one or more lines or planes. |
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bud-scale scar |
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FEATURE |
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A scar on a stem due to abscission of a bud scale. The scar(s) encircle(s) the axis to which the bud was terminal, each single scar having an outline like that of a transverse section through the base of the bud scale that was inserted there. Sets of bud scale scars (one set per bud) usually delimit seasonal stem growth increments in temperate zone taxa. |
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superior 1 |
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insertion |
indusium |
Inserted at or near the apex of the sorus, distal to the sporangia. |
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bulb |
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STRUCTURE |
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A thickened underground perennating structure consisting of a stem with numerous closely proximate nodes bearing many tightly imbricate, thickened, often fleshy, foliaceous organs containing large amounts of stored food, usually in the form of starch; the whole usually enveloped and protected by imbricated scarious or fibrous foliaceous organs. |
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superior 2 |
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position |
ovary |
Not enclosed to any degree by a floral tube casing, the perianth and/or androecium thus arising beneath (proximal to) it. |
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drupelet |
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nominative |
fruit |
Diminutively drupe-like but derived from one of the simple, superior ovaries of an apocarpous flower, having a fleshy fruit wall and a hard seed (pyrene) within, a distinct constituent in an aggregate fruit; esp. in Rosaceae. |
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obcordate |
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plane shape |
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Inversely cordate (heart-shaped). |
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pallid |
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coloration |
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Relatively pale; not strongly colored. |
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epidermis pl. epidermides, epidermises |
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STRUCTURE |
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The anatomically distinct, outermost, living tissue that encloses and protects the other tissues of a plant organ or part, usually overlaid by an exuded waxy cuticle; resulting from primary growth, disrupted and shed as a consequence of secondary growth if that occurs; consisting mainly of cells not further specialized, otherwise including various types of more specialized cells associated with trichomes and stomates. |
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orientation |
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CHARACTER |
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Attitude or direction with respect to some explicit or implicit structure(s) or context. The lexicon relating to orientation includes some conceptually complex terms whose meanings also embrace aspects of structural composition or shape. Overlaps conceptually with arrangement, habit, insertion, position, and shape. |
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truncate 2 |
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base |
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Having a generalized proximal boundary that is more or less straight or plane and approximately perpendicular to the central axis. |
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percurrent 2 |
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architecture |
tertiary laminar veins |
Perpendicular to and interconnecting adjacent parallel secondary veins, the secondary and tertiary veins together forming a scalariform pattern. |
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transverse 1 |
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dehiscence |
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More or less perpendicular to the central axis. |
