lyrate leaf
Noun: A lyrate leaf is a type of simple leaf characterized by a shape that suggests the curvature of a lyre, an ancient stringed instrument. In botany, this typically means the leaf has a large, rounded terminal lobe at the apex and several smaller, lateral lobes toward the base, creating an overall outline reminiscent of the instrument's body.
The term is used specifically in botanical descriptions to classify and describe the morphology of certain plant leaves. * The dandelion, in its mature form, often produces a lyrate leaf. * Botanists identified the species partly by its distinctive lyrate leaves.
In detailed botanical keys and taxonomic descriptions, "lyrate" is a precise term for a pinnately lobed leaf where the terminal lobe is significantly larger than the others. * The leaf venation pattern within the large terminal lobe of a lyrate leaf is often palmate.
- Lyrately (adverb): In a lyrate manner.
- The leaves are divided lyrately.
- Lyre (noun): The stringed instrument whose shape the leaf resembles.
- Pinnatifid (adjective): A broader category for leaves that are pinnately lobed, which includes lyrate leaves as a specific type.
- Lyre-shaped leaf: A direct descriptive synonym.
- Pinnately lobed leaf with a large terminal lobe: A more descriptive, non-technical phrase.
The word "lyrate" itself, outside of the compound term "lyrate leaf," is an adjective used in biology and other sciences to describe any structure (e.g., a bird's tail feather, a shell) that curves in a shape reminiscent of a lyre. However, "lyrate leaf" is a fixed botanical noun phrase with the specific meaning defined above.
-
a simple leaf having curvature suggestive of a lyre
