Genus of plants
Carterella is a monotypic genus of flowering plants in the family Rubiaceae.[1][2][3] The genus contains only one species, viz. Carterella alexanderae, which is endemic to Baja California Sur in Mexico. It grows on steep slopes in the mountains.[4]
Description
This species is a woody perennial that grows 30 to 60 cm tall, with terete stems. The leaves are 15 to 45 mm long, and 3 to 10 mm wide, opposite or occasionally formed in whorls of three, shaped linear-lanceolate, and acute at their apex.[2]
The flowers grow on a 5 to 12 flowered compact cyme, borne on pedicels up to 1 cm long. There are 4 calyx lobes, shaped lance-linear, and 4 to 5 mm long, 1 to 1.5 mm wide at the base. The corolla is salverform and colored white, with the corolla tube 2.5 to 3.5 cm long, the throat 2 mm in diameter, and the lobes shaped oblong, 8 to 10 mm long and 4 to 5 mm wide. The seeds are wingless.[2]
Taxonomy
The specific epithet was named by Annetta M. Carter in memory of her friend Annie M. Alexander, who assisted Carter in botanizing the Baja California Peninsula.[2] The genus is named in honor of Carter herself, after the species was found not to belong in Bouvardia or Hedyotis.[1]
Distribution
This plant is endemic to Baja California Sur and occurs only in the Cape region.[5] The type specimen was found growing on steep granite talus.[2]
References
External links
