Definition

Noun: A simple leaf (a leaf not divided into separate leaflets) characterized by having a rounded or blunt tip, rather than a pointed or sharp one.

Usage

This is a specific botanical term used to describe the shape of a leaf's apex (tip). It is used in scientific descriptions, field guides, and botanical studies.

Examples

• The plant was identified by its obtuse leaves, which lacked a pointed tip.
• In the dichotomous key, the characteristic "obtuse leaf" helped distinguish this species from its relatives.
• Botanists noted that the obtuse leaf morphology was consistent across the population.

Advanced Usage

• Comparative Description: The term is often used in contrast to "acute leaf" (pointed tip) or "acuminate leaf" (tapering to a long, fine point).
  • The specimen had obtuse leaves, while the similar-looking species had distinctly acute ones.

Variants and Related Words

• Obtuse (adjective): In a general sense, means blunt or not sharp. In geometry, an angle greater than 90° and less than 180°.
• Leaf apex: The tip of a leaf, where terms like obtuse, acute, acuminate, emarginate, etc., are applied.
• Simple leaf: A leaf with a single, undivided blade, as opposed to a compound leaf.

Synonyms

• Blunt-tipped leaf
• Rounded leaf (though "rounded" can sometimes imply a more circular shape than merely a blunt tip)

Antonyms

• Acute leaf
• Acuminate leaf
• Pointed leaf

Noun

1. a simple leaf having a rounded or blunt tip