Buddleja davidii var. nanhoensis

Buddleja davidii var. nanhoensis is endemic to Gansu, China, and introduced by Farrer in 1914.^[1][2] The taxonomy of the plant and the other five davidii varieties has been challenged in recent years. Leeuwenberg sank them all as synonyms, considering them to be within the natural variation of a species,^[3] a treatment adopted in the Flora of China published in 1996.^[4]

Buddleja davidii var. nanhoensis
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Lamiales
Family:	Scrophulariaceae
Genus:	Buddleja
Species:	B. davidii
Variety:	B. d. var. nanhoensis
Trinomial name
Buddleja davidii var. nanhoensis Rehder
Synonyms
Buddleja variabilis nanhoensis Chittenden

Description

Buddleja davidii var. nanhoensis is chiefly distinguished by its small size. Rarely growing to a height of > 1.5 m, the shrub has a more compact habit than the type, narrower leaves and shorter panicles.^[1]

Cultivation

Now very rare in cultivation, unlike its various 'Nanho' hybrid cultivars, the shrub is still grown in the UK at the Sir Harold Hillier Gardens near Romsey.^[5]

Suppliers

There are seven nurseries in the UK still raising the shrub listed in the RHS Plantfinder.^[6]