What does "spring cleavers" mean?

annual having the stem beset with curved prickles; North America and Europe and Asia

What is a synonym for "spring cleavers"?

Common synonyms include: catchweed, cleavers, clivers, galium aparine, goose grass.

Rare ·Advanced level

Noun

1
annual having the stem beset with curved prickles; North America and Europe and Asia wordnet