seed_shape

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• Label: Seed shape
• Entity URI: https://w3id.org/APD/traits/trait_0012618
• Type: categorical
• Definition: A seed morphology trait [TO:0000184] which is the 3-D [PATO:0001710] shape [PATO:0000052] of a seed [PO:0009010] considering the relative seed length [PATO:0000122], seed width [PATO:0000921], and seed height PATO:0000119] dimensions and the curvature [PATO:0001591] of the seed's surface [NCIT:C25245].;Three-dimensional shape of the seed.
• Additional comments: The trait values indicate the approximate shape of the seed, acknowledging few seeds are exactly ellipsoid, globoid, etc. The list of terms has been chosen to represent different length:width:height ratios and different levels of symmetry. Terms that suggest very specific shapes have generally been grouped into a broader category for increased interoperability across datasets.
• Allowed values:

  value	description
  comma-shaped	A seed displaying a single arc of curvature, such that it bilaterally symmetrical. (Synonyms, comma-shaped, falcate, sickle-shaped scimitar-shaped)
  conical	Cone-shaped, with a broad flat base and narrow apex; turbinate refers to the inverse shape. (Synonyms, obconical, cone-shaped, turbinate, top-shaped)
  cuneate	A 3-dimensional shape that is wedge-shaped or boat-shaped.
  cylindrical	A cylinder, a shape with a flat top and bottom that are circular or elliptical in outline and are linked by a curved surface. (Synonyms, terete)
  discoid	A subset of cylinder, a shape with a flat, circular or elliptical top and bottom, linked by a curved surface, where the length of the curved surface is much shorter than the cross-section of the flat surfaces. (Synonyms, flat)
  ellipsoid	A 3-dimensional shape that is elliptic in long section and circular in cross section; length:width ratio between 2:1 and 3:2. (Synonyms, obloid, oblong)
  ellipsoid_flattened	A 3-dimensional shape that is elliptic in long section and and laterally compressed/flattened such that it is non-circular in cross section; length:width ratio between 2:1 and 3:2.
  fusiform	Spindle-shaped; A 3-dimension shape that is narrowly ellipsoid, circular in cross-section and tapering sharply toward both ends. (Synonyms, spindle-shaped)
  globoid	A 3-dimensional shape that is circular in both long section and cross section. (Synonyms, globose, globular, spherical)
  globoid_flattened	A 3-dimensional shape that is circular in both long section and somewhat flattened such that it is non-circular in cross section.
  hemispheric	Half a sphere or globe, with a flat base, domed top, and circular in cross-section. (Synonyms, convex)
  hemispheric_flattened	A 3-dimensional shape that is a laterally compressed/flattened half-sphere or globe; shape has a flat base, a domed top, and is elliptical in cross-section.
  lenticular	Shaped like a biconvex lens and circular in cross section; shaped like a lentil.
  orbicular	A poorly defined term that remains in AusTraits only as a placeholder; it appears to be used as both globoid (spherical) and lenticular by different authors.
  ovoid	A 3-dimensional shape that is egg-shaped in long section and circular in cross section. Term as used in AusTraits includes variants on egg-shaped including pyriform (pear-shaped) and obovoid (inversely egg-shaped) (Synonyms, pyriform, obovoid)
  ovoid_elongated	A 3-dimensional shape that is egg-shaped in long section and circular in cross section, where the length dimension is much longer than the width/height dimensions. Term as used in AusTraits includes specific shapes club-shaped (clavate/obclavate) and tear-shaped (lachrimiform). (Synonyms, lachrimiform, tear-shaped, lachrymiform, clavate; obclavate, club-shaped)
  ovoid_flattened	A 3-dimensional shape that is egg-shaped in long section and laterally compressed/flattened such that is non-circular in cross section.
  polyhedral	A 3-dimensional shape with distinct, fairly flat faces and edges; includes prisms and tetrahedral shaped seeds. (Synonyms, rhomboid, prismatic, pyramidal, rectangular, square)
  polyhedral_elongated	A 3-dimensional shape with distinct, fairly flat faces and edges, where the length dimension is much longer than the width/height dimensions; includes elongate prisms and elongate tetrahedral shaped seeds.
  polyhedral_inflated	A 3-dimensional shape with distinct faces and edges but the faces tend to bulge outwards.
  reniform	Having a cross-section that is roughly circular with a notch; strictly a kidney-shape but the definition applied here includes heart-shaped seeds and other seeds with a distinct notch. (Synonyms, cordiform, kidney-shaped, heart-shaped)
  sectoroid	Shaped like an orange segment or wedge of a sphere. (Synonyms, wedge-shaped)
  sinusoidal	A seed with two arcs of curvature or a single arc, such that it lacks an axis of symmetry. (Synonyms, sigmoidal)
  winged	A seed with wings. (Synonyms, samara)

See the AusTraits Plant Dictionary (https://w3id.org/APD/traits/trait_0012618) for additional information about this trait.

Coverage

For this trait, AusTraits includes a total of 10,883 records. This includes:

• data for 7,433 species.
• data for 192 families.
• data from 16 datasets (see the portal Citations tab for a list of sources)