Differs from the typical plant in the much richer darker red flowers produced in heads in the upper leaf axils. L. rotundifolius is usually brick red and has larger flowers with fewer flowers per head. Pale green bifoliate leaves. Climber to 2m and I find it easier and more vigorous than typical L rotundifolius. Dies down completely by August. Well-drained soil in sun. June / July. Early summer.