Buddleja racemosa

Buddleja racemosa, commonly known as the Wand (or Texas) Butterfly Bush, is endemic to the southern edge of the limestone Edwards Plateau in Texas, United States, from Austin to Rocksprings, growing around streams, creeks and springs at elevations of 250 – 750 m. The plant was first named and described by John Torrey in 1859.[1][2]

Buddleja racemosa
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Scrophulariaceae
Genus: Buddleja
Species:
B. racemosa
Binomial name
Buddleja racemosa

Description

Buddleja racemosa is a small, lax, dioecious shrub 0.3 – 1.5 m tall, with greyish-brown rimose bark and persistent old branches. The young branches are terete, tomentose and glandular, bearing small subcoriaceous ovate-oblong to lanceolate leaves 3 – 10 cm long by 1.5 – 4 cm wide, with petioles <2 cm long. The pale yellow inflorescences are 8 – 30 cm long, usually comprising 8 – 12 pairs of small globose heads 0.5 – 0.7 cm in diameter, each head with 6 – 12 flowers. Ploidy: 2n = 38.[2]

Varieties

Norman identifies two varieties distinguished by the number of stellate hairs on the undersides of the leaves:[2]

  • Buddleja racemosa var. incana
  • Buddleja racemosa var. racemosa

Cultivation

The species is not known to be in cultivation.

References
  1. Torrey, J. (1859). Bot. of the Boundary. 121, 1859
  2. Norman, E. M. (2000). Buddlejaceae. Flora Neotropica 81, pp. 135 - 141. New York Botanical Garden, USA
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