Epimedium × rubrum
|Epimedium × rubrum|
|Species:||E. × rubrum|
|Epimedium × rubrum
E. alpinum 'Rubrum'
Epimedium × rubrum, known as red barrenwort, is a perennial flowering plant in the family Berberidaceae, cultivated in gardens. It is considered to be a hybrid between E. alpinum and E. grandiflorum. The Royal Horticultural Society has given it the Award of Garden Merit (AGM).
E. × rubrum is a deciduous perennial, spreading by rhizomes. It is about 30 cm (1.0 ft) tall. When the young leaves emerge in spring, they are tinged with red. The leaves also turn red in the autumn. The flowers appear with the young leaves in spring, and are borne on a loose raceme. Individual flowers are about 2 cm (0.8 in) across, with red sepals and yellow petals.
E. × rubrum is recommended for cultivation in shade or part-shade in moist soil, although it tolerates drier conditions when well-established. Old foliage should be cut back before the new leaves and flowers appear in spring. It was given the Award of Garden Merit by the Royal Horticultural Society in 1993, with a hardiness rating of H7, meaning that it is very hardy, withstanding temperatures below −20 °C (−4 °F).
- IPNI Plant Name Query Results for Epimedium rubrum, The International Plant Names Index, retrieved 2013-05-10
- "Epimedium × rubrum AGM", RHS Plant Selector (Royal Horticultural Society), retrieved 2013-05-10
- "Epimedium × rubrum", Plant Finder (Missouri Botanical Garden), retrieved 2013-05-10