Buddleja × wardii

Buddleja × wardii is a naturally occurring hybrid of Buddleja alternifolia and Buddleja crispa discovered and collected by Frank Kingdon-Ward in 1924 from the mountain riverbanks of south-eastern Xizang (formerly Tibet) at altitudes of 3000–3600 m; B. alternifolia and B. crispa are the only other Buddleja species found in the area. The shrub was named for Ward by Cecil Marquand in 1929.[1][2][3] White-flowering plants under this name were collected in Tibet by Keith Rushforth and introduced to commerce in the UK in 2013.

Buddleja × wardii
Terminal inflorescence, Buddleja × wardii (white form)
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Scrophulariaceae
Genus: Buddleja
Species:
B. × wardii
Binomial name
Buddleja × wardii

Description
Leaf detail

Buddleja × wardii is a shrub 1–5 m tall, with stellate tomentose glabrescent branchlets bearing leaves arranged both opposite and alternate, the blade elliptic to subelliptic, 0.5–5.0 × 0.3–2.0 cm, shortly stellate tomentose, margin repand-crenate, the apex acuminate to acute. The terminal inflorescences are cymose, 1.5–2.0 cm in diameter, comprising pale lilac or white flowers with orange throats; the corolla tubes about 7 × 2 mm.[3][1] The shrub flowers in April in southern England.

Cultivation

The hybrid is very rare in cultivation. Hardiness: USDA zones 8–9.[2]

Accessions

Europe
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References
  1. Leeuwenberg, A. J. M. (1979) The Loganiaceae of Africa XVIII Buddleja L. II, Revision of the African & Asiatic species. H. Veenman & Zonen B. V., Wageningen, Nederland.
  2. Stuart, D. D. (2006). Buddlejas. RHS Plant Collector Guide. Timber Press, Oregon. ISBN 978-0-88192-688-0.
  3. Marquand, C. (1929). J. Linn. Soc., Bot. 48: 203. 1929.
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