Final answer:
The forage legume known for producing adventitious roots at nodes along its stolons is white clover. This trait helps it to spread and propagate effectively in favorable conditions.
Step-by-step explanation:
The forage legume that produces adventitious roots at nodes along its stolons is the white clover. This botanical adaptation allows the plant to clone itself and spread across a larger area, aiding in its survival and propagation. White clover (Trifolium repens) is known for its ability to root at the nodes of its stolons, which then allow for the establishment of new plants at each node where the conditions are favorable.
Legumes like white clover are a major component of sustainable agriculture due to their capacity for nitrogen fixation and contribution to soil health, and the spreading mechanism of adventitious roots makes them particularly effective at covering ground and improving soil quality across a given area. This characteristic of rooting at stolon nodes is not highlighted as a typical trait in the other listed legumes such as Kura clover, Cicer milkvetch, or Crownvetch.