Glossary of Plant Anatomy

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lamina [PO:0025060; plant anatomy term ]
A cardinal part of multi-tissue plant structure (PO:0025498) that is thin and flat.
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late wood [PO:0004516; plant anatomy term ]
A portion of secondary xylem (PO:0005848) that is a part of a growth ring (PO:0004514) formed during the later part of a growing season, has higher density than early wood (PO:0004515) of the same growth ring, and has as parts late wood tracheary elements (PO:0025462) with generally smaller lumens than the early wood tracheary elements (PO:0025461) of the same growth ring.
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late wood tracheary element [PO:0025462; plant anatomy term ]
A tracheary element that is part of a portion of late wood (PO:0004516).
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lateral leaf vein [PO:0006011; plant anatomy term ]
An unbranched second order leaf vein (PO:0020140) that runs between two adjacent primary leaf veins (PO:0025413).
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lateral meristem [PO:0020145; plant anatomy term ]
A portion of meristem (PO:0009013) tissue located parallel to the sides of a shoot axis (PO:0025029) or root (PO:0009005) that participates in lateral growth.
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lateral root [PO:0020121; plant anatomy term ]
A root (PO:0009005) that develops from a lateral root primordium (PO:0000016) that is part of another root on the same plant.
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lateral root apical meristem [PO:0006020; plant anatomy term ]
A root apical meristem (PO:0020147) that gives rise to a lateral root (PO:0020121).
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lateral root cap [PO:0020131; plant anatomy term ]
A portion of root parenchyma tissue that is part of a root cap and is parallel to the sides of a root axis.
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lateral root cap of lateral root [PO:0003020; plant anatomy term ]
A lateral root cap that is part of a root cap of lateral root.
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lateral root cap of primary root [PO:0003022; plant anatomy term ]
A central root cap that is part of a root cap of primary root.
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lateral root differentiation zone [PO:0003016; plant anatomy term ]
A root differentiation zone that is part of a lateral root.
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lateral root elongation zone [PO:0025256; plant anatomy term ]
A root elongation zone that is part of a lateral root tip.
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lateral root primordium [PO:0000016; plant anatomy term ]
A root primordium (PO:0005029) that is part of a root (PO:0009005) and is committed to the development of a lateral root (PO:0020121).
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lateral root tip [PO:0000027; plant anatomy term ]
A root tip (PO:0000025) of a lateral root (PO:0020121).
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lateral root-cap epidermal initial cell [PO:0000061; plant anatomy term ]
A root initial cell that produces lateral root-cap cells and root epidermis.
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laticifer cell [PO:0025031; plant anatomy term ]
A ground tissue cell (PO:0025030) that contains latex.
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leaf [PO:0025034; plant anatomy term ]
A phyllome (PO:0006001) that is not associated with a reproductive structure.
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leaf abaxial epidermis [PO:0006019; plant anatomy term ]
A portion of leaf epidermis (PO:0006016) that covers the abaxial/lower surface of a leaf.
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leaf abaxial pavement cell [PO:0025213; plant anatomy term ]
A leaf pavement cell that is part of a leaf abaxial epidermis.
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leaf abaxial stomatal complex [PO:0025190; plant anatomy term ]
A leaf stomatal complex (PO:0025183) that is part of a leaf abaxial epidermis (PO:0006019).
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leaf abaxial trichome [PO:0025210; plant anatomy term ]
A leaf trichome that is part of a leaf abaxial epidermis.
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leaf abscission zone [PO:0006501; plant anatomy term ]
An abscission zone (PO:0000146) at the base of a vascular leaf (PO:0009025) where it separates during leaf abscission (GO:0060866).
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leaf adaxial epidermis [PO:0006018; plant anatomy term ]
A portion of leaf epidermis (PO:0006016) that covers the adaxial/upper surface of a leaf.
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leaf adaxial pavement cell [PO:0025214; plant anatomy term ]
A leaf pavement cell that is part of a leaf adaxial epidermis.
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leaf adaxial stomatal complex [PO:0025191; plant anatomy term ]
A leaf stomatal complex that is part of a leaf adaxial epidermis.
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leaf adaxial trichome [PO:0025211; plant anatomy term ]
A leaf trichome that is part of a leaf adaxial epidermis.
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leaf aerenchyma [PO:0006215; plant anatomy term ]
A portion of parenchyma tissue containing particularly large intercellular spaces in the leaf mesophyll.
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leaf apex [PO:0020137; plant anatomy term ]
A phyllome apex (PO:0025139) that is part of a leaf (PO:0025034).
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leaf apex tendril [PO:0025363; plant anatomy term ]
A leaf apex of a laminar vascular leaf that is slender and coiling.
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leaf axil [PO:0009023; plant anatomy term ]
An axil that is the space between a shoot axis and a leaf that branches from the shoot axis.
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leaf base [PO:0020040; plant anatomy term ]
A phyllome base (PO:0025140) that is part of a leaf (PO:0025034).
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leaf collar [PO:0006012; plant anatomy term ]
A thin band of intercalary meristematic tissue at the junction of a leaf blade (lamina) and a leaf sheath found in grasses.
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leaf endodermis [PO:0005060; plant anatomy term ]
A portion of endodermis that is part of a vascular leaf.
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leaf epidermis [PO:0006016; plant anatomy term ]
A portion of phyllome epidermis (PO:0025157) that is part of a leaf.
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leaf guard cell [PO:0025237; plant anatomy term ]
A phyllome guard cell that is part of a leaf stomatal complex.
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leaf intercalary meristem [PO:0006346; plant anatomy term ]
An intercalary meristem (PO:0006073) that is part of a leaf (PO:0006346) and is intercalated between two portions of non-meristematic tissue between a leaf apex (PO:0020137) and a leaf base (PO:0020040).
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leaf lamina [PO:0020039; plant anatomy term ]
A phyllome lamina (PO:0025396) that is the part of a leaf (PO:0025034) exclusive of the petiole (PO:0020038) or leaf sheath (PO:0020104), if either is present.
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leaf lamina abaxial epidermis [PO:0000049; plant anatomy term ]
A portion of leaf lamina epidermis that covers the abaxial/lower surface of a leaf lamina.
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leaf lamina adaxial epidermis [PO:0000050; plant anatomy term ]
A portion of leaf lamina epidermis that covers the adaxial/upper surface of a leaf lamina.
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leaf lamina areole [PO:0025392; plant anatomy term ]
A phyllome lamina areole (PO:0025391) that is part of a leaf lamina (PO:0020039) and is completely surrounded by leaf lamina veins (PO:0020138) and cannot be divided into any smaller parts that are completely surrounded by leaf lamina veins.
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leaf lamina base [PO:0008019; plant anatomy term ]
The region of the leaf lamina proximal to the stem and usually connected to it by means of a petiole.
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leaf lamina crena [PO:0025519; plant anatomy term ]
A phyllome lamina crena (PO:0025516) that is a rounded projection on a leaf margin (PO:0020128) for which the corresponding leaf sinus (PO:0025384) extends less than one quarter of the distance to the center of the long axis of the leaf lamina (PO:0020039).
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leaf lamina epidermis [PO:0000047; plant anatomy term ]
A portion of leaf epidermis that is part of a leaf lamina.
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leaf lamina intramarginal vein [PO:0025520; plant anatomy term ]
A leaf lamina vein (PO:0020138) that is just inside the leaf lamina margin (PO:0025009) and extends from the leaf lamina base (PO:0008019) to the leaf apex (PO:0020137).
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leaf lamina lobe [PO:0025517; plant anatomy term ]
A phyllome lobe (PO:0025514) that is a projection on a leaf lamina margin (PO:0025009) for which the corresponding leaf sinus (PO:0025384) extends one quarter or more of the distance to the center of the long axis of the leaf lamina (PO:0020039).
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leaf lamina margin [PO:0025009; plant anatomy term ]
The margin of a leaf lamina.
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leaf lamina stomatal complex [PO:0025185; plant anatomy term ]
A leaf stomatal complex that is part of a leaf lamina.
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leaf lamina tip [PO:0025589; plant anatomy term ]
A leaf tip (PO:0025142) that is the distal portion of the leaf lamina (PO:0020039).
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leaf lamina tooth [PO:0025518; plant anatomy term ]
A phyllome lamina tooth (PO:0025515) that is an angular projection on a leaf margin (PO:0020128) for which the corresponding leaf sinus (PO:0025384) extends less than one quarter of the distance to the center of the long axis of the leaf lamina (PO:0020039).
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leaf lamina vascular system [PO:0000048; plant anatomy term ]
A vascular system that includes the totality of the portions of vascular tissue in their specific arrangement in a leaf lamina.
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leaf lamina vein [PO:0020138; plant anatomy term ]
A phyllome lamina vein (PO:0025348) that is part of a leaf lamina vascular system (PO:0000048).
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leaf margin [PO:0020128; plant anatomy term ]
A phyllome margin (PO:0025018) of any flattened part of a leaf (PO:0025034).
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leaf marginal meristem [PO:0025405; plant anatomy term ]
A portion of phyllome marginal meristem (PO:0025404) tissue that is part of a leaf margin (PO:0025009) of a vascular leaf (PO:0009025) during a leaf expansion stage (PO:0001052) and has parts marginal and submarginal initials.
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leaf meristematic apical cell [PO:0030011; plant anatomy term ]
A shoot meristematic apical cell that is part of a leaf apex.
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leaf mesophyll [PO:0005645; plant anatomy term ]
The chloroplast-containing, photosynthetic parenchymatous tissue situated between the two epidermal layers of the foliage leaf.
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leaf mesophyll intercellular space [PO:0025380; plant anatomy term ]
An intercellular space that is part of a leaf mesophyll.
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leaf midvein [PO:0020139; plant anatomy term ]
A primary leaf vein (PO:0025413) that is the central vein of a vascular leaf (PO:0009025).
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leaf papilla cell [PO:0025167; plant anatomy term ]
A papilla cell that is part of a leaf epidermis.
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leaf pavement cell [PO:0025212; plant anatomy term ]
An epidermal pavement cell that is part of a leaf epidermis.
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leaf plate meristem [PO:0025429; plant anatomy term ]
A phyllome plate meristem (PO:0025428) in the vascular leaf (PO:0009025).
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leaf prickle [PO:0025175; plant anatomy term ]
A prickle that is part of a leaf.
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leaf procambial cell [PO:0000063; plant anatomy term ]
A procambial cell (PO:0025258) that is part of a leaf procambium (PO:0025259).
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leaf procambium [PO:0025259; plant anatomy term ]
A portion of shoot procambium (PO:0025276) tissue that is part of a vascular leaf (PO:0009025).
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leaf rachis [PO:0020055; plant anatomy term ]
A stalk that is the main axis of a pinnate or more highly compound leaf, that bears leaflets or divisions of the axis.
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leaf rachis tendril [PO:0025366; plant anatomy term ]
A leaf rachis that is slender and coiling and lacks a lamina.
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leaf sheath [PO:0020104; plant anatomy term ]
A tubular portion of the leaf surrounding the stem, as in the Poaceae.
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leaf sheath abaxial epidermis [PO:0025250; plant anatomy term ]
A portion of leaf sheath epidermis that covers the abaxial/lower surface of a leaf sheath.
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leaf sheath adaxial epidermis [PO:0025251; plant anatomy term ]
A portion of leaf sheath epidermis that covers the adaxial/upper surface of a leaf sheath.
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leaf sheath auricle [PO:0020106; plant anatomy term ]
A cardinal organ part (PO:0025001) that is an ear-shaped outgrowth of the distal part of a leaf sheath (PO:0020104).
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leaf sheath epidermis [PO:0025249; plant anatomy term ]
A portion of leaf epidermis that is part of a leaf sheath.
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leaf sheath pulvinus [PO:0008017; plant anatomy term ]
A more or less abrupt swelling, especially at the apex or base of a leaf sheath.
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leaf sinus [PO:0025384; plant anatomy term ]
A phyllome sinus that is a marginal embayment, incision or indentation between marginal projections of any sort, typically lobes, teeth, or the base of cordate leaves.
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leaf stomatal complex [PO:0025183; plant anatomy term ]
A phyllome stomatal complex (PO:0025215) that is part of a leaf.
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leaf stomatal pore [PO:0025235; plant anatomy term ]
A phyllome stomatal pore that is part of a leaf stomatal complex.
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leaf substomatal cavity [PO:0025399; plant anatomy term ]
A phyllome substomatal cavity that is part of a leaf mesophyll.
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leaf tendril [PO:0025361; plant anatomy term ]
A vascular leaf that is slender and coiling and lacks a lamina.
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leaf tip [PO:0025142; plant anatomy term ]
A phyllome tip (PO:0025141) that is part of a leaf apex (PO:0020137).
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leaf trichome [PO:0006504; plant anatomy term ]
A phyllome trichome that is part of a leaf epidermis.
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leaf vascular system [PO:0000036; plant anatomy term ]
A phyllome vascular system that includes the totality of the portions of vascular tissue in their specific arrangement in a leaf.
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leaf-derived cultured plant cell [PO:0000007; plant anatomy term ]
A cultured plant cell that was derived from leaf tissue.
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leaflet [PO:0020049; plant anatomy term ]
One of the ultimate segments of a compound leaf.
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leaflet margin [PO:0006034; plant anatomy term ]
The margin of the leaflet.
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leaflet primordium [PO:0025481; plant anatomy term ]
A primordium (PO:0025127) that develops as part of a leaf primordium (PO:0000017) of a compound leaf (PO:0020043) and is committed to the development of a leaflet (PO:0020049).
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leaflet tendril [PO:0025362; plant anatomy term ]
A leaflet that is slender and coiling and lacks a lamina.
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lemma [PO:0009037; plant anatomy term ]
A flower bract (PO:0009034) that is the lower of the two bracts (PO:0009055) enclosing a (PO:0009082) spikelet floret.
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lemma awn [PO:0006032; plant anatomy term ]
An awn that is part of a lemma.
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lenticel [PO:0000031; plant anatomy term ]
A portion of ground tissue composed of a loosely-packed mass of cork cells occurring especially in the young stem, bark or even leaf of a plant, visible on the surface as a raised, often powdery-appearing spot.
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leptoid [PO:0025033; plant anatomy term ]
A native plant cell (PO:0025606) that resembles in structure the sieve elements (PO:0025406) of vascular plants.
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leptome [PO:0030048; plant anatomy term ]
A portion of plant tissue (PO:0009007) that has as parts leptoid (PO:0025033) cells and cells of no other types.
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libriform fiber cell [PO:0004520; plant anatomy term ]
A xylem fiber cell (PO:0000274) with simple pits.
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ligule [PO:0020105; plant anatomy term ]
A membranous or hairy appendage on the adaxial/upper surface of a leaf, at the junction between sheath and blade, especially in grasses.
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locule [PO:0025263; plant anatomy term ]
A plant anatomical space that is a cavity a reproductive structure.
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lodicule [PO:0009036; plant anatomy term ]
A phyllome that is part of a grass floret and is one of two or three tiny scales or flaps of tissue outside the stamens.
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lodicule anlagen [PO:0025483; plant anatomy term ]
A phyllome anlagen (PO:0025430) that will give rise to a lodicule primordium (PO:0008040) and is part of a peripheral zone (PO:000225) of a flower meristem (PO:0000229).
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lodicule primordium [PO:0008040; plant anatomy term ]
A phyllome primordium (PO:0025128)that develops from a lodicule anlagen (PO:0025483) and is committed to the development of a lodicule (PO:0009036).
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long cell [PO:0004717; plant anatomy term ]
A more or less rectangular leaf pavement cell in which the proximodistal dimension is several times longer than the transverse dimension.
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long lateral tassel branch [PO:0009101; plant anatomy term ]
The long branch that arise from the central spike of tassel in maize.
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long lateral tassel branch meristem [PO:0009104; plant anatomy term ]
The meristem that gives rise to the long lateral branch in the maize tassel.
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long shoot [PO:0004702; plant anatomy term ]
Shoot system in which all or most of the internodes elongate.
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lower floret of pedicellate spikelet of ear [PO:0006353; plant anatomy term ]
An ear floret that is the lower of the two florets of a pedicellate spikelet rachilla of an ear inflorescence.
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lower floret of pedicellate spikelet of tassel [PO:0006313; plant anatomy term ]
A tassel floret that is the lower of the two florets of a pedicellate spikelet of a tassel inflorescence.
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lower floret of sessile spikelet of ear [PO:0006351; plant anatomy term ]
An ear floret that is the lower of the two florets on a sessile spikelet of an ear inflorescence.
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lower floret of sessile spikelet of tassel [PO:0006315; plant anatomy term ]
A tassel floret that is the lower of the two florets of a sessile spikelet of a tassel inflorescence.
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lower glume [PO:0006002; plant anatomy term ]
A glume that is the proximal/basal of the two glumes subtending a pair of florets.
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lower glume of ear spikelet [PO:0006369; plant anatomy term ]
A lower glume that is part of an ear spikelet.
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lower glume of pedicellate spikelet of ear [PO:0006437; plant anatomy term ]
A lower glume of ear spikelet that is part of an ear pedicellate spikelet.
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lower glume of pedicellate spikelet of tassel [PO:0006385; plant anatomy term ]
A lower glume of tassel spikelet that is part of a tassel pedicellate spikelet.
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lower glume of sessile spikelet of ear [PO:0006438; plant anatomy term ]
A lower glume of ear spikelet that is part of an ear sessile spikelet.
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lower glume of sessile spikelet of tassel [PO:0006386; plant anatomy term ]
A lower glume of tassel spikelet that is part of a tassel sessile spikelet.
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lower glume of tassel spikelet [PO:0006372; plant anatomy term ]
A lower glume that is part of a tassel spikelet.
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lupulin gland [PO:0005030; plant anatomy term ]
A glandular trichome (PO:0004509) that synthesizes terpenophenolic resins and prenylflavonoids.
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