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lageniform |
= ampulliform, flask-shaped |
solid shape |
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Generally circular in cross-section, broadest at or below the middle, approximately globose below that and constricted above to a relatively narrow neck; like a flask. |
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lamella pl. lamellae |
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STRUCTURE |
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A thin layer of tissue that forms a plate within tissue of lesser density or between areas of empty space. |
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lamellate |
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apex |
laminar structure |
Having two small terminal plates of tissue closely parallel to one another and perpendicular to the plane of the lamina. |
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lamina 1 pl. laminae |
= blade |
STRUCTURE |
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The expanded, more or less planate, distal portion, when present, of a leaf, leaflet or bract. |
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lamina 2 pl. laminae |
= ray |
STRUCTURE |
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The distal, relatively flat portion of the zygomorphic corolla of a ray floret, terminating in 0--4 teeth or lobes; in Asteraceae (Compositae). |
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laminar 1 |
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insertion |
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Upon or otherwise directly associated with the lamina (blade) of a foliaceous structure. |
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laminar 1 |
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position |
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Upon or otherwise directly associated with the lamina (blade) of a foliaceous structure. |
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laminar 2 |
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solid shape |
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Relatively very thin with parallel opposite broad faces, the whole plane or variously curved. Structures to which this term, along with any other three-dimensional ones, is applicable are often also described as though only two-dimensional, using terms that are implicitly understood to refer only to the outline of the broad faces. |
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laminate |
|
architecture |
foliaceous structure |
Having an expanded, more or less planate, distal portion (lamina or blade). |
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lanate |
< woolly |
pubescence |
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Bearing relatively long, moderately stout, intertwined, somewhat matted, capillate trichomes. See also lanulose. |
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lancehead-shaped 1 |
= lanceolate |
plane shape |
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Elongate, moderately narrow, broadest just above the base and gradually attenuate toward the apex, the sides more or less straight; like the outline of the broad lateral face of a lance head. See also oblanceolate. |
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lancehead-shaped 2 |
= lanceoloid, lanciform |
solid shape |
|
Considerably longer than broad, compressed or not, broadest near the base and somewhat concavely attenuate to the apex, the attenuation in all median longitudinal planes or else largely confined to one, depending upon the extent of compression, if any. See also oblanceoloid (oblanciform). |
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lanceolate |
= lancehead-shaped |
plane shape |
|
Elongate, moderately narrow, broadest just above the base and gradually attenuate toward the apex, the sides more or less straight; like the outline of the broad lateral face of a lance head. See also oblanceolate. |
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lanceoloid |
= lancehead-shaped, lanciform |
solid shape |
|
Considerably longer than broad, compressed or not, broadest near the base and somewhat concavely attenuate to the apex, the attenuation in all median longitudinal planes or else largely confined to one, depending upon the extent of compression, if any. See also oblanceoloid (oblanciform). |
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lanciform |
= lancehead-shaped, lanceoloid |
solid shape |
|
Considerably longer than broad, compressed or not, broadest near the base and somewhat concavely attenuate to the apex, the attenuation in all median longitudinal planes or else largely confined to one, depending upon the extent of compression, if any. See also oblanciform (oblanceoloid). |
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lanuginose |
< cottony |
pubescence |
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Bearing relatively long and fine, intertwined, somewhat matted, capillate trichomes. |
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lanulose |
|
pubescence |
|
Finely lanate. |
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late-maturing |
= serotinous |
maturation |
structure |
Maturing late in the growing season, or late relative to the developmental progress of its context. |
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lateral |
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insertion |
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To, toward, at, or upon a side, not apical or basal. |
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lateral |
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position |
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To, toward, at, or upon a side, not apical or basal. |
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lateral vein |
>< costa, primary vein, rib; > secondary vein |
STRUCTURE |
|
A longitudinal primary vein (costa, rib) that runs to one side of the midline, or a secondary vein that runs toward the lateral margin. See also tertiary vein, veinlet. |
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latex pl. latices, latexes |
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SUBSTANCE |
|
A moderately viscous and sticky exudate, often milky, sometimes otherwise colored or clear. Overlaps conceptually with gum. |
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laticiferous |
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exudation |
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Producing and exuding latex. |
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latrorse |
|
dehiscence |
anther |
Opening laterally, on the tangential sides. See also extrorse, introrse. |
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latticed |
= cancellate, clathrate |
architecture |
foliaceous structure |
Having portions of the blade naturally devoid of any but vascular tissue, which forms an open lattice in those areas. |
