Glossary of Plant Anatomy

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fascicular cambium [PO:0006200; plant anatomy term ]
A portion of vascular cambium (PO:0005598) that develops from a procambium (PO:0025275) in a vascular bundle (PO:0005020) that is part of a shoot system (PO:0009006).
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female archesporial cell [PO:0006015; plant anatomy term ]
An archesporial cell (PO:0030056) that is part of a megasporangium (PO:0025201) and divides to give rise to a megasporocyte (PO:0000431).
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fertile lemma [PO:0009041; plant anatomy term ]
A lemma that encloses a functional flower, with androecium, gynoecium or both.
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fiber tracheid [PO:0000355; plant anatomy term ]
A xylem fiber cell (PO:0000274) with bordered pits with pit cavities.
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fifth order inflorescence branch [PO:0025107; plant anatomy term ]
An inflorescence branch (PO:0009081) arising from a fourth order inflorescence branch (PO:0025106).
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fifth order infructescence branch [PO:0025116; plant anatomy term ]
An infructescence branch (PO:0025243) arising from a fourth order infructescence branch (PO:0025115).
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filament [PO:0009067; plant anatomy term ]
A stalk that is part of a stamen.
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filament epidermis [PO:0006060; plant anatomy term ]
A portion of stamen epidermis that is part of a filament.
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filament vascular system [PO:0008014; plant anatomy term ]
A vascular system that includes the totality of the portions of vascular tissue in their specific arrangement in a filament.
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first order inflorescence axis [PO:0025104; plant anatomy term ]
An inflorescence axis (PO:0020122) that is the primary or main axis of an inflorescence (PO:0009049).
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first order infructescence axis [PO:0025244; plant anatomy term ]
An infructescence axis that is the primary or main axis of an infructescence.
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flag leaf [PO:0020103; plant anatomy term ]
The last mature leaf before the inflorescence in a cereal crop plant.
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floral organ [PO:0025395; plant anatomy term ]
A plant organ (PO:0009008) that is part of a flower (PO:0009046).
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floral organ abscission zone [PO:0006502; plant anatomy term ]
An abscission zone (PO:0000146) at the base of a flower (PO:0009001) where a floral organ (PO:0025395) separates during floral organ abscission (GO:0010227).
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floral organ primordium [PO:0025477; plant anatomy term ]
A primordium (PO:0025127) that is committed to the development of a floral organ (PO:0025395) and is part of a reproductive shoot apex (PO:0025222).
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flower [PO:0009046; plant anatomy term ]
A determinate reproductive shoot system (PO:0025082) that has as part at least one carpel (PO:0009030) or at least one stamen (PO:0009029) and does not contain any other determinate shoot system (PO:0009006) as a part.
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flower bract [PO:0009034; plant anatomy term ]
A bract (PO:0009055) that subtends a perianth (PO:0009058) that is part of a flower (PO:0009046).
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flower bract primordium [PO:0025488; plant anatomy term ]
A bract primordium (PO:0025128) is committed to the development of a flower bract (PO:0009034).
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flower bud [PO:0000056; plant anatomy term ]
A bud that develops into a flower.
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flower fascicle [PO:0025323; plant anatomy term ]
A reproductive shoot system that is a second or higher order inflorescence in which the second or higher order inflorescence branch bears two or more flowers but is not elongated.
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flower meristem [PO:0000229; plant anatomy term ]
A portion of reproductive shoot apical meristem tissue (PO:0008028) that gives rise to the floral organs (PO:0025395).
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flower nectary [PO:0009056; plant anatomy term ]
A multicellular glandular structure found in the flower secreting a liquid containing organic substances especially sugars.
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flower pedicel [PO:0009052; plant anatomy term ]
An inflorescence branch (PO:0009081) that supports an individual flower (PO:0009046) in an inflorescence (PO:0009049).
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flower pedicel abscission zone [PO:0025608; plant anatomy term ]
An abscission zone (PO:0000146) that forms as a swelling or joint on the flower pedicel (PO:009052).
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flower vascular system [PO:0005017; plant anatomy term ]
A shoot system vascular system that includes the totality of the portions of vascular tissue in their specific arrangement in a flower.
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fourth order inflorescence branch [PO:0025106; plant anatomy term ]
An inflorescence branch (PO:0009081) arising from a third order inflorescence branch (PO:0025105).
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fourth order infructescence branch [PO:0025115; plant anatomy term ]
An infructescence branch (PO:0025243) arising from a third order infructescence branch (PO:0025114).
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free ending veinlet [PO:0025390; plant anatomy term ]
A leaf lamina vein (PO:0020138) above the first order that is connected to another vein only at one end.
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free nuclear endosperm [PO:0000198; plant anatomy term ]
An endosperm in which at least the first karyokinesis is not followed by cytokinesis.
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free petal [PO:0025569; plant anatomy term ]
A petal (PO:0009032) that is part of a perianth (PO:0009058) that contains fused sepals (PO:0025584) and/or fused petals (PO:0025583), but is separate from the other sepals (PO:0009031) and petals (PO:0009032).
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free sepal [PO:0025587; plant anatomy term ]
A sepal (PO:0009031) that is part of a perianth (PO:0009058) that contains fused sepals (PO:0025584) and/or fused petals (PO:0025583), but is separate from the other sepals (PO:0009031) and petals (PO:0009032).
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free tepal [PO:0025136; plant anatomy term ]
A tepal (PO:0009033) that is part of a collective tepal structure (PO:0025021), along with a fused collective tepal structure (PO:0025138), but is separate from (PATO:0001505) the other tepals.
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fruit [PO:0009001; plant anatomy term ]
A multi-tissue plant structure (PO:0025496) that develops from a gynoecium (PO:0009062) and may have as parts one or more seeds (PO:0009010).
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fruit abscission zone [PO:0006503; plant anatomy term ]
An abscission zone (PO:0000146) at the base of a fruit (PO:0009001) where the fruit separates from the fruit pedicel (PO:0004536) during fruit abscission (GO:0060867).
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fruit columella [PO:0004540; plant anatomy term ]
A columella that forms the central axis of a fruit.
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fruit dehiscence zone [PO:0004707; plant anatomy term ]
A dehiscence zone that is part of a fruit.
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fruit distal end [PO:0008001; plant anatomy term ]
A cardinal part of multi-tissue plant structure (PO:0025498) that is the end of a fruit (PO:0009001) distal from a fruit pedicel (PO:0004536).
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fruit locule [PO:0025270; plant anatomy term ]
A locule that is a cavity in a fruit and develops from an ovary locule.
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fruit nucellus [PO:0008005; plant anatomy term ]
A nucellus that is part of a fruit.
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fruit operculum [PO:0025298; plant anatomy term ]
A collective organ part structure that is the apical part of a circumsessile capsular fruit that separates from the rest of the capsule during dehiscence.
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fruit pedicel [PO:0004536; plant anatomy term ]
An infructescence branch (PO:0025243) that supports an individual fruit (PO:0009001).
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fruit pedicel abscission zone [PO:0025605; plant anatomy term ]
An abscission zone (PO:0000146) that forms as a swelling or joint on the fruit pedicel (PO:0004536).
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fruit placenta [PO:0004535; plant anatomy term ]
A portion of placenta tissue that is part of a fruit and to which seeds are attached.
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fruit proximal end [PO:0008002; plant anatomy term ]
A cardinal part of multi-tissue plant structure (PO:0025498) that is the end of a fruit (PO:0009001) proximal to a fruit pedicel (PO:0004536).
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fruit replum [PO:0025267; plant anatomy term ]
A portion of fruit placenta tissue that divides a fruit into two or more chambers and develops from a replum.
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fruit septum [PO:0025268; plant anatomy term ]
A septum that divides a cavity or mass of tissue in a fruit and develops from an ovary septum.
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fruit storage parenchyma [PO:0025037; plant anatomy term ]
A portion of storage parenchyma that is part of a fruit.
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fruit valve [PO:0000033; plant anatomy term ]
A valve that is a part of a fruit that splits apart when the fruit dehisces.
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fruit vascular system [PO:0008003; plant anatomy term ]
A vascular system that includes the totality of the portions of vascular tissue in their specific arrangement in a fruit.
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functional megaspore [PO:0000244; plant anatomy term ]
A megaspore(s) that forms an embryo sac.
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funicle [PO:0020006; plant anatomy term ]
A stalk (PO:0025066) that attaches a plant ovule (PO:0020003) to a placenta (PO:0025078).
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fused calyx [PO:0025582; plant anatomy term ]
A calyx (PO:0009060) that is composed of fused sepals (PO:0025584).
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fused collective tepal structure [PO:0025138; plant anatomy term ]
A collective tepal structure (PO:0025021) in which there are at least two fused tepals (PO:0025137).
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fused corolla [PO:0025581; plant anatomy term ]
A corolla (PO:0009059) that is composed of fused petals (PO:0025583).
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fused perianth [PO:0025580; plant anatomy term ]
A perianth (PO:0009058) in which one or more of the petals (PO:0009032), sepals (PO:0009031), and/or tepals (PO:0009033) are fused (PATO:0000642).
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fused petal [PO:0025583; plant anatomy term ]
A petal (PO:0009032) that is part of a fused corolla (PO:0025581) or a fused perianth (PO:0025580).
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fused sepal [PO:0025584; plant anatomy term ]
A sepal (PO:0009031) that is part of the fused calyx (PO:0025582) or a fused perianth (PO:0025580).
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fused tepal [PO:0025137; plant anatomy term ]
A tepal (PO:0009033) that is part of a fused collective tepal structure (PO:0025138) in which it is fused to at least one other tepal.
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fusiform initial cell [PO:0000079; plant anatomy term ]
An elongated cambial initial cell (PO:0000295) with approximately wedge-shaped ends that is part of the vascular cambium (PO:0005598) and gives rise to axial cells.
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