Buddleja utahensis

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Lamiids
Ordo: Lamiales

Familia: Scrophulariaceae
Tribus: Buddlejeae
Genus: Buddleja
Sectio: B. sect. Buddleja
Series: B. ser. Glomeratae
Species: Buddleja utahensis
Name

Buddleja utahensis Coville
References

Proceedings of the Biological Society of Washington 7:69. 1892
USDA, ARS, Germplasm Resources Information Network. Buddleja utahensis in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 07-Oct-06.

Buddleja utahensis is a species of Buddleja endemic to the southwestern United States (northwest Arizona, eastern California, southern Nevada, and southwestern Utah),[1] where it is known by the common names Utah butterfly bush[1] and Panamint butterfly bush.[1] Named and described by Coville in 1892, the shrub favours limestone outcrops at elevations of 700–2000 m,[2] where it is often found in association with Joshua trees.[3]

Description

Buddleja utahensis is a compact, dwarf dioecious shrub reaching 0.3–1.0 m in height. The bark is rimose and greyish, while the plant structure is characterized by persistent naked twigs. The younger branches are terete, bearing subsessile linear to oblong leaves 1.5–3.5 cm long by 0.3–0.5 cm wide, rounded at the apex and attenuate at the base. Both surfaces of the leaves are densely short tomentose, bestowing a silver-grey appearance. The inflorescences are 4–12 cm long, with 3–7 pairs of heads forming verticels, subtended by leafy bracts. The verticels are 0.5–1.13 cm in diameter, each comprising 15–30 pale yellow flowers, the corollas 4–5 mm long.[2] Capsules are up to 2.5 mm long, with numerous globose seeds up to 0.4 mm in diam.[4]
Cultivation

Buddleja utahensis is very rare in cultivation; it is a difficult plant to raise in temperate regions, demanding very free draining soil and infrequent watering. Hardiness: USDA zone 8.[3]

References

Buddleja utahensis was first described and published in Proceedings of the Biological Society of Washington 7:69. 1892. "Buddleja utahensis". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved January 22, 2012.
Norman, E. M. (2000). Buddlejaceae. Flora Neotropica 81, pp 116–117. New York Botanical Garden, USA. ISSN 0071-5794
Stuart, D. (2006). Buddlejas. Plant Collector Guide. Timber Press, Oregon, USA. ISBN 978-0-88192-688-0
Norman, E.M. 1992. Buddlejaceae, Butterfly Bush Family. Journal of the Arizona-Nevada Academy of Science 26:5-6.