Epimedium • Bishop’s Hat • イカリソウ • 碇草 • ikari-sō
EDIT 4/24/15: added pic of epidemedium growing in Azumaya south bed (Area T): it is small like ‘Niveum’ but flower color more cream/yellow. The epidemdium in E (by the WPA bridge) is not blooming yet.
Epimedium has 60 different species, 3 of which grow in our garden, 2 in Area B, and also in Areas E and T. Area B has epimedium grandiflorum and epimedium x youngianum “Niveum’ growing in common patch in SW corner of Area B (by the camellia ‘Nuccio’s Jewel’, surrounded by the ilex creanata ‘Sky Pencil). There is also epimedium sp. listed in Areas E and T. This post is about epimedium x youngianum ‘Niveum’ in B.
From Perennials.com: Epimedium × youngianum ‘Niveum’, Barrenwort, USDA Zone: 4-9, Plant number: 1.198.700. Barrenwort are superb shade-garden plants, excellent for edging or groundcover, and deserving much wider use in our gardens. In this selection, plants form a bushy mound of dark green leaves, bearing sprays of pure white flowers in mid to late spring. Although they will take a couple of years to reach a mature size, plants are long-lived and very sturdy. Old leaves should be pruned to the ground in late winter to show the flowers to best effect. Drought tolerant once established. Plants may be divided in early spring or late summer. […]
From Crocus.UK: Epimedium × youngianum ‘Niveum’, barrenwort. 9cm pot. Pretty and versatile with distinctive, heart-shaped leaves and a spreading habit, epimediums bring lightness and airiness to a shady border. The leaves of this variety are semi-evergreen and flushed with bronze in spring and autumn. In spring, it has masses of tiny, bell-shaped pure white flowers with long spurs, held on wiry, red-tinted stems. A wonderful ground-covering plant, which will lighten up shady areas, or can be planted en-masse under deciduous trees. […]