Utah Butterflybush (Buddleja utahensis)
Description
B. 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. Capsules are up to 2.5 mm long, with numerous globose seeds up to 0.4 mm in diam.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum: Magnoliophyta
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Class: Magnoliopsida
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Order: Lamiales
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Family: Scrophulariaceae
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Genus: Buddleja
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