About Buddleja marrubiifolia Benth.
Buddleja marrubiifolia Benth. is a dioecious, multi-branched shrub that grows 0.5 to 2 m (1.6 to 6.6 ft) high. It has greyish to blackish rimose bark. Young branches are terete and tomentose, and bear ovate to rhomboid leaves. The leaves are 1 to 3 cm (0.39 to 1.18 in) long by 0.6 to 1.5 cm (0.24 to 0.59 in) wide, membranaceous to subcoriaceous, and densely tomentose on both surfaces. The inflorescence is a terminal globose head 0.8 to 1.2 cm (0.31 to 0.47 in) in diameter, which holds 35 flowers. The flowers are deep yellow when they open and turn orange later, and their corollas measure 2 to 3.5 mm (0.079 to 0.138 in) long. The recorded ploidy for this species is 2n = 38. In cultivation, the shrub is grown throughout Tucson, Arizona to attract butterflies. It is also planted as an ornamental in Hawaii. It is sold commercially in France by several specialist alpine nurseries. It was introduced to the United Kingdom in February 2013; one small plant was acquired by Longstock Park Nursery, which holds the NCCPG national buddleja collection, and another by the Royal Botanic Garden Edinburgh. This species is hardy in USDA zone 7.
