acuminatifolia, a perennial vine, occurs in fields and
mountains. It resembles another species, R. volubillis, but
there are some morphological differences between them. With
Rhynchosia acuminatifolia, leaflets are large and thin, and tips
abruptly become narrow to get pointed. And also, the width of the
leaflet's lower halves is broadest, while in R. volubillis,
the upper halves are widest. Bloom time: July-September.