Glossary of Plant Anatomy

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banner petal [PO:0025324; plant anatomy term ]
A petal (PO:0009032) that is the top-most petal of a papilionaceous corolla (PO:0009059).
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bark [PO:0004518; plant anatomy term ]
All tissues outside the vascular cambium or the xylem; in older trees may be divided into dead outer bark and living inner bark, which consists of secondary phloem.
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basal axillary shoot system [PO:0005001; plant anatomy term ]
An axillary shoot system (PO:0006343) that is part of a stem base (PO:0008039).
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basal endosperm transfer cell [PO:0009018; plant anatomy term ]
A transfer cell that is part of a basal endosperm transfer layer.
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basal endosperm transfer layer [PO:0025196; plant anatomy term ]
A portion of plant tissue that is part of an endosperm and is composed of basal endosperm transfer cells.
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basal root [PO:0025002; plant anatomy term ]
A shoot-borne internode root (PO:0025593) that arises from a part of the hypocotyl (PO:0020100).
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basal root primordium [PO:0025479; plant anatomy term ]
A root primordium (PO:0005029) that is committed to the development of a basal root (PO:0025002).
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body cell [PO:0025526; plant anatomy term ]
A spermatogenous cell (PO:0025525) of the microgametophyte (PO:0025280) that divides to produce a vegetative cell (PO:0020099) and the pollen sperm cell (PO:0025121).
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brachycyte [PO:0030058; plant anatomy term ]
A native plant cell (PO:0025606) that develops from a cell in a protonema (PO:0030003) and has a thick cell wall.
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bract [PO:0009055; plant anatomy term ]
A phyllome that subtends a reproductive structure.
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bract abaxial epidermis [PO:0025159; plant anatomy term ]
A portion of bract epidermis that covers the abaxial/lower surface of a bract.
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bract adaxial epidermis [PO:0025160; plant anatomy term ]
A portion of bract epidermis that covers the adaxial/upper surface of a bract.
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bract anlagen [PO:0025482; plant anatomy term ]
A phyllome anlagen (PO:0025430) that will give rise to a bract primordium (PO:0025487) and is part of a peripheral zone (PO:000225) of a reproductive shoot apical meristem (PO:0008028).
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bract apex [PO:0025154; plant anatomy term ]
A phyllome apex (PO:0025139) that is part of a bract (PO:0009055).
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bract axil [PO:0025225; plant anatomy term ]
An axil that is the space between a shoot axis and a bract that branches from the shoot axis.
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bract base [PO:0025155; plant anatomy term ]
A phyllome base (PO:0025140) that is part of a bract (PO:0009055).
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bract epidermis [PO:0025158; plant anatomy term ]
A portion of phyllome epidermis (PO:0025157) that is part of a bract (PO:0009055).
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bract margin [PO:0025011; plant anatomy term ]
A phyllome margin (PO:0025018) that is part of a bract (PO:0009055).
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bract primordium [PO:0025487; plant anatomy term ]
A phyllome primordium (PO:0025487) that is committed to the development of a flower bract (PO:0009055).
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bract stomatal complex [PO:0025216; plant anatomy term ]
A phyllome stomatal complex (PO:0025215) that is part of a bract (PO:0009055).
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bract tip [PO:0025156; plant anatomy term ]
A phyllome tip that is part of a bract apex.
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bract trichome [PO:0025098; plant anatomy term ]
A phyllome trichome that is part of a bract epidermis.
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bracteole [PO:0009043; plant anatomy term ]
A small leaf or leaves borne singly or in pairs on the pedicel, the prophyll(s) of the flower-shoot (pedicel plus flower).
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branch [PO:0025073; plant anatomy term ]
A shoot axis (PO:00025029) that develops from an axillary bud meristem (PO:0000232) or from equal divisions of a meristematic apical cell (PO:0030007).
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branch axil [PO:0025226; plant anatomy term ]
An axil that is the space between a shoot axis and a branch that branches from the shoot axis.
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branch epidermis [PO:0025179; plant anatomy term ]
A portion of shoot axis epidermis that is part of a branch.
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branch internode [PO:0025080; plant anatomy term ]
A shoot axis internode (PO:0005005) that is part of a branch (PO:0025073).
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branch internode differentiation zone [PO:0025103; plant anatomy term ]
A shoot internode differentiation zone that is part of a branch internode.
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branch internode elongation zone [PO:0025101; plant anatomy term ]
A shoot axis internode elongation zone that is part of a branch internode.
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branch node [PO:0025024; plant anatomy term ]
A shoot node (PO:0005004) that is part of a branch (PO:0025073).
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branch procambium [PO:0025274; plant anatomy term ]
A portion of shoot axis procambium gives rise to the primary vascular tissue of a branch.
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branch stele [PO:0025199; plant anatomy term ]
A shoot axis stele that is part of a branch.
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branch tendril [PO:0025364; plant anatomy term ]
A branch that is slender and coiling.
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branch trichome [PO:0025177; plant anatomy term ]
A shoot axis trichome that is part of a branch epidermis.
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bud [PO:0000055; plant anatomy term ]
An undeveloped shoot system (PO:0009006).
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bud scale leaf [PO:0020054; plant anatomy term ]
A scale leaf that surrounds a dormant or perennating bud.
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bulb [PO:0025356; plant anatomy term ]
A short, enlarged shoot system (PO:0009006) that has as parts a short stem (PO:0009047) in which the shoot internodes (PO:0005005) do not elongate, and one or more buds (PO:0000055) enclosed by fleshy leaves (PO:0009025) or leaf bases (PO:0020040).
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bulliform cell [PO:0004001; plant anatomy term ]
An enlarged more or less thin-walled leaf pavement cell, present, with other similar cells, in longitudinal rows in leaves of monocots.
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bundle sheath [PO:0006023; plant anatomy term ]
A layer or layers of cells surrounding the vascular bundles of leaves. It may consist of parenchyma or sclerenchyma.
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bundle sheath cell [PO:0025541; plant anatomy term ]
A ground tissue cell (PO:0000076) that is part of a bundle sheath (PO:0006023).
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bundle sheath chlorenchyma cell [PO:0025542; plant anatomy term ]
A chlorenchyma cell (PO:0000076) that is part of a bundle sheath (PO:0006023).
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bundle sheath extension [PO:0006022; plant anatomy term ]
A strip of ground tissue present along the leaf veins and extending from the bundle sheath to the epidermis. It may be present on one or both sides of the vein and may consist of parenchyma or sclerenchyma.
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