The flowers are white to pale yellow, and the fruit is a dark red berry 7–8 mm diameter containing numerous seeds.

It is suspected that Lonicera morrowii is allelopathic, and may capitalize on disturbed ecological succession by establishing itself and then preventing the growth of plants underneath it.

[7] With a sufficiently established thicket of honeysuckle, even other shade-tolerant, invasive species, such as Fortune's spindle have difficulty growing underneath it, whether due to its suspected allelopathic activity or through soil depletion.

[8] Many cedar waxwings' wax spots in the eastern United States have taken on an unusual orange hue in the last 35 years, a phenomenon that has been attributed to Lonicera morrowii.

[9] The chemical involved in this color change is rhodoxanthin, a red dye found in the berries of Morrow's honeysuckle.