American rattlebox

9.0

A tropical flowering plant from the Americas with colorful flowers and pods whose seeds rattle when shaken

noun

: crotalaria

The seeds of the American rattlebox make a distinctive sound when the plant is shaken by the wind.

Examples

The American rattlebox is often found in warm climates across Central and South America.
Many gardeners grow American rattlebox for its attractive flowers and interesting pods.
The American rattlebox is known for its unique seed pods.
Have you seen an American rattlebox in the garden?
The American rattlebox produces seeds that rattle inside its pods when the plant is disturbed.
In my garden, the American rattlebox has stylish pods that create a rattling sound in the breeze.
You can hear the seeds of the American rattlebox shake inside the pods on windy days.

Synonyms

Crotalaria sagittalis

vsAmerican rattlebox

Specialized

9.9

A tropical plant with dry pods that rattle when seeds move

is the same plant but uses slightly different phrasing

rattlebox

vsAmerican rattlebox

Specialized

9.9

A plant whose swollen seed pods make a shaking sound and that farmers use to feed animals and improve soil

is a single tropical American annual rather than many different species

Surface Forms

American rattlebox singular

American rattleboxes plural

Morphology

American + rattlebox

The noun phrase is fully compositional: 'American' denotes origin (from the Americas) and 'rattlebox' names a plant with inflated seed pods that rattle. Combining these constituents yields a predictable referent (the American species/variety of that plant), a straightforward pattern familiar across languages, so a B1 learner who knows both words would understand it.

Etymology

American rattlebox comes from the plant's swollen seed pods that hold hard seeds which rattle inside like a small box when the wind or a touch shakes them. That's why the name points to the plant's noisy seeds and its American origin.