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Carterella

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Genus of plants

Carterella
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Gentianales
Family: Rubiaceae
Subfamily: Rubioideae
Tribe: Spermacoceae
Genus: Carterella
Terrell
Species: C. alexanderae
Binomial name
Carterella alexanderae
(A.M.Carter) Terrell
Synonyms
  • Bouvardia alexanderae A.M.Carter
  • Hedyotis alexanderae (A.M.Carter) W.H.Lewis

Carterella is a monotypic genus of flowering plants in the family Rubiaceae. 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.

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.

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.

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. The genus is named in honor of Carter herself, after the species was found not to belong in Bouvardia or Hedyotis.

Distribution

This plant is endemic to Baja California Sur and occurs only in the Cape region. The type specimen was found growing on steep granite talus.

References

  1. ^ Terrell, Edward Everett. 1987. Brittonia 39(2): 250, Carterella alexanderae
  2. ^ Carter, Annetta Mary. 1955. Madroño 13(4): 142–144, f. 1–2. Bouvardia alexanderae
  3. Lewis, Walter Hepworth. 1968. Annals of the Missouri Botanical Garden 55(1): 31 Hedyotis alexanderae
  4. "Carterella in the World Checklist of Rubiaceae". Retrieved 11 June 2014.
  5. Rebman, J. P.; Gibson, J.; Rich, K. (2016). "Annotated checklist of the vascular plants of Baja California, Mexico" (PDF). San Diego Society of Natural History. 45: 247.

External links

Taxon identifiers
Carterella


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