Justicia (plant)

Justicia is a genus of flowering plants in the family Acanthaceae. It is the largest genus within the family, encompassing around 700[3] species with hundreds more as yet unresolved.[4] They are native to tropical to warm temperate regions of the Americas, India and Africa. The genus serves as host to many butterfly species, such as Anartia fatima. Common names include water-willow and shrimp plant, the latter from the inflorescences, which resemble a shrimp in some species. The generic name honours Scottish horticulturist James Justice (1698–1763).[5] They are closely related to Pachystachys.[6]

Justicia
Justicia magnifica
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Acanthaceae
Subfamily: Acanthoideae
Tribe: Justicieae
Genus: Justicia
L.[1]
Species

Over 900, see List of Justicia species

Synonyms[2]

Description

They are evergreen perennials and shrubs with leaves which are often strongly veined; but they are primarily cultivated for their showy tubular flowers in shades of white, cream, yellow, orange or pink. They are not hardy below 7 °C (45 °F), so may be grown under glass in frost-prone areas.[6]

Species
Main article: List of Justicia species

Selected species include:

Justicia brandegeeana (formerly Beloperone guttata, commonly called shrimp plant) is native to Mexico. It is hardy to −4 °C but will often recover in the spring after freezing back in USDA Plant Zone 8a.

Justicia carnea (formerly Jacobinia carnea, common names including Brazilian plume flower, flamingo flower, and jacobinia) is native to South America in southern Brazil, Paraguay and northern Argentina. It is hardy to −2 °C but will often recover in the spring after freezing back in USDA Plant Zone 8a.

Justicia procumbens is procumbent herb with angular stems, swollen at nodes, small ovate leaves, small purple flowers in terminal spikes, inserted didynamous stamens, and shortly bilobed stigmas.

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References
  1. "Genus: Justicia L." Germplasm Resources Information Network. United States Department of Agriculture. 2009-01-23. Archived from the original on 2015-09-24. Retrieved 2010-05-26.
  2. "Justicia L." Plants of the World Online. Board of Trustees of the Royal Botanic Gardens, Kew. 2017. Retrieved 9 July 2020.
  3. Daniel, Thomas F. (2011). "JUSTICIA (ACANTHACEAE) IN TEXAS". Journal of the Botanical Research Institute of Texas. 5 (2): 595–618. JSTOR 41972309.
  4. "Justicia — the Plant List".
  5. Austin, Daniel F. (2004). Florida Ethnobotany. CRC Press. p. 381. ISBN 978-0-8493-2332-4.
  6. RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 978-1405332965.

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