Descriptor : Stipules

Descriptor type : categorical

Stipule: Leaflike appendage arising from canal-bract junction in a wall of inverted-V or V-shaped appearance.

Canal: Pore modified by skeletal structure thikening or by lintels streching. Canal length is greater than perforation diameter.

Bract: Plate stems from lintels which incompletely covering a single pore.

Lintel: Skeletal structure separating and bounding adjacent pores.


Present on outer carcass wall

Carcass: Part of wall on intervallum side.

Outer wall: External part of the skeleton, composed by a porous carcass, simple or coated by an additional sheath.

Present on inner carcass wall

Carcass: Part of wall on intervallum side.

Inner wall: Internal part of the skeleton, separating central cavity and skeleton structure, composed by a porous carcass, simple or coated by an additional sheath.

None

No stipule.

isn't included in the term


Hierarchy

structure
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 |_ Stipules