Buddleja araucana

Buddleja araucana
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Lamiales
Family:	Scrophulariaceae
Genus:	Buddleja
Species:	B. araucana
Binomial name
	Buddleja araucana; Phil.
Synonyms
	Buddleja globosa var. araucana (Phil.) Reiche; Buddleja nappii Lorentz, 1881;

Buddleja araucana is endemic to the semi-deserts and steppes of Patagonia, from southern Mendoza to Río Negro and Neuquen provinces in Argentina, and adjacent Chile.[1] The species was first described and named by Philippi in 1873,[2] it was introduced to cultivation by the British gardener and plant collector Harold Comber[3] as a form B. globosa in 1925.[4]

Description

B. araucana is a dioecious shrub, 1–3 m tall, with grey fissured bark. The young branches are terete and tomentose, bearing sessile coriaceous leaves linear to lanceolate tomentose on both sides, 3–9 cm long by 0.8–1.8 cm wide. The light orange inflorescence comprises one terminal globose head and 1–5 pairs of pedunculate heads in the axils of the progressively larger leaves; the heads are 1–2 cm in diameter and contain 25–45 flowers, the corolla is tomentulose, 4–5 mm long, with warty hairs inside. Ploidy: 2n = 38.[1]

The species is easily confused with B. globosa, but the latter has larger, more glabrous leaves, and larger flowerheads comprising more flowers.

Cultivation

The shrub has proved hardy in the UK, where it has survived at Kew since 1927.[4] It is also cultivated at the RBG Edinburgh, and as part of the NCCPG National Buddleja Collections at Longstock Park Nursery and The Lavender Garden, where it is still known (2012) by its old taxon B. nappii. Hardiness: USDA zones 7–9.[5] One notable cultivar of B. araucana is Buddleja 'Winter Sun'.[6]

References

Norman, E. M. (2000). Buddlejaceae. Flora Neotropica 81. New York Botanical Garden, USA
Philippi, R. A. (1873). Anales Univ. Chile 525-526, 1873;
"Harvard University Herbaria & Libraries". kiki.huh.harvard.edu.
Bean, W. J. (1914). Trees and shrubs hardy in the British Isles. Eighth edition, revised by D. L. Clarke, 1989. Vol. 1, A-C. Murray, London.
Stuart, D. (2006). Buddlejas. Plant Collector Guide. Timber Press, Oregon, USA. ISBN 978-0-88192-688-0
Large, Andrew. "Buddleja 'Winter Sun' - Trees and Shrubs Online". Trees and Shrubs Online. International Dendrology Society. Retrieved 2021-12-04.

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[Norman-1] Norman, E. M. (2000). Buddlejaceae. Flora Neotropica 81. New York Botanical Garden, USA

[Philippi-2] Philippi, R. A. (1873). Anales Univ. Chile 525-526, 1873;

[3] "Harvard University Herbaria & Libraries". kiki.huh.harvard.edu.

[Bean-4] Bean, W. J. (1914). Trees and shrubs hardy in the British Isles. Eighth edition, revised by D. L. Clarke, 1989. Vol. 1, A-C. Murray, London.

[Stuart-5] Stuart, D. (2006). Buddlejas. Plant Collector Guide. Timber Press, Oregon, USA. ISBN 978-0-88192-688-0

[:0-6] Large, Andrew. "Buddleja 'Winter Sun' - Trees and Shrubs Online". Trees and Shrubs Online. International Dendrology Society. Retrieved 2021-12-04.