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Glite Dictionary
twice-pinnate

twice-pinnate

9.9
A leaf divided twice into pairs of small leaflets
  • adjective
  • Specialized
translation icon : bipinnado
  • The fern has twice-pinnate leaves that give it a delicate and feathery appearance.

Examples

  • Some acacias display twice-pinnate foliage, which helps reduce water loss in dry environments.

  • Each twice-pinnate leaf is divided into many smaller leaflets arranged in pairs along the stem.

  • The twice-pinnate leaves of the plant are quite unique.

  • Is this fern twice-pinnate or just pinnate?

  • Each twice-pinnate leaf is divided into many smaller leaflets arranged in pairs along the stem.

  • Some acacias display twice-pinnate foliage, which helps reduce water loss in dry environments.

  • The fern has twice-pinnate leaves that give it a delicate and feathery appearance.

Synonyms

bipinnate
vstwice-pinnate
  • Specialized
9.9

A leaf with leaflets that are divided again into smaller leaflets like a feather

is the same botanical structure expressed as doubly pinnate
bipinnate leaf
vstwice-pinnate
  • Specialized
8.6

A leaf with each main leaflet divided into smaller leaflets, like on ferns

refers to the same doubly pinnate form but as a named leaf type

How Divided

tripinnate
  • Specialized
9.9
twice-pinnate
  • Specialized
9.9
pinnate
  • Specialized
1 9.6
parted
  • Specialized
7.7
simple
  • Specialized
7 7.4

Surface Forms

twice-pinnate positive

Morphology

twice-pinnate = pinnate (transparent) = twice + pinnate

A clear numeric modifier: 'twice' + 'pinnate' directly indicates a leaf that is pinnate two times (leaflets themselves pinnate).

Etymology

The word twice-pinnate is built from twice ('two times') and pinnate, which comes from a word for 'feather' and describes leaves with small leaf parts arranged like a feather. So twice-pinnate means those feather-like parts are themselves divided again, making the leaf doubly divided.