Pacific Island Ecosystems at Risk (PIER)

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Ruellia brittoniana
Leonard, Acanthaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Ruellia coerulea Morong; Ruellia malacosperma Greenm.; Ruellia simplex C. Wright; Ruellia spectabilis Britton; Ruellia tweedieana Griseb.

Common name(s): [more details]

English: Britton's wild petunia, Mexican blue-bells, Mexican petunia, Spanish-ladies

Habit:  herb

Description:  "Erect perennial herbs; lower stems sometimes becoming somewhat woody, 0.5-1 m long.  Leaves linear-elliptic to linear-lanceolate, 8-22 cm long, 0.8-1.5 cm wide, glabrate, petioles 10-24 mm long.  Flowers in cymose panicles, each flower subtended by 2 linear bracts 3-7 mm long; calyx lobes 5, linear, 8-12 mm long; corolla lavender, the throat purple, 4-4.5 cm long. Capsules ellipsoid, 2-2.5 cm long, glabrous"  (Wagner et al., 1999; p. 174).

Habitat/ecology:  In Hawai‘i, "cultivated as an ornamental but easily escaping, now naturalized and often found in dry habitats such as cracks in sidewalks and disturbed, shaded gulch bottoms"  (Wagner et al., 1999; p. 174).

Propagation:  Seed

Native range:  Mexico, Caribbean islands, Brazil, Bolivia, Argentina, Paraguay; Uruguay (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Cook Islands
Southern Cook Islands
Mangaia Island introduced
invasive
McCormack, Gerald (2013)
Introduced - Recent, Naturalised; Land, lowlands - inland valleys.
Ecuador (Galápagos Islands)
Isabela Group
Isabela Island introduced
invasive
cultivated
Charles Darwin Foundation (2008)
As Ruellia malacosperma
Ecuador (Galápagos Islands)
San Cristóbal Group
San Cristóbal Island introduced
invasive
cultivated
Charles Darwin Foundation (2008)
As Ruellia malacosperma
Ecuador (Galápagos Islands)
Santa Cruz Group
Santa Cruz Island introduced
invasive
cultivated
Charles Darwin Foundation (2008)
As Ruellia malacosperma
French Polynesia
Society Islands
Tahiti Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Naturalisée
French Polynesia
Tuamotu Archipelago
Niau Atoll introduced
invasive
cultivated
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 10144 (PAP)
Naturalisée
State of Hawaii
Hawaiian Islands
Kaua‘i Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 174)
State of Hawaii
Hawaiian Islands
Maui Island introduced
invasive
Oppenheimer, Hank L./Bartlett, Randal T. (2002) (p. 2)
West Maui. Voucher cited: Oppenheimer H70094 (BISH, PTBG)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 174)
Voucher cited: St. John 10515 (BISH)
Marshall Islands
Ralik Chain
Kwajalein (Kuwajleen) Atoll introduced
cultivated
Whistler, W. A./Steele, O. (1999) (p. 98)
United States (other Pacific offshore islands)
Midway Atoll
Midway Atoll introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 174)
United States (other Pacific offshore islands)
Midway Atoll
Sand Island introduced
invasive
Starr, Forest/Starr, Kim/Loope, Lloyd (2008) (pp. B-13)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Australia
Australia (continental)
Queensland introduced
invasive
Queensland Herbarium (2002) (p. 7)
Central America
Central America (Pacific rim)
Costa Rica (Republic of)   Missouri Botanical Garden (2013)
Central America
Central America (Pacific rim)
El Salvador (Republic of)   Missouri Botanical Garden (2013)
Central America
Central America (Pacific rim)
Honduras (Republic of)   Missouri Botanical Garden (2013)
Central America
Central America (Pacific rim)
Panama (Republic of)   Missouri Botanical Garden (2013)
China
China
Hong Kong introduced
cultivated
Wu, Te-lin (2001) (p. 254)
Ornamental.
Japan
Japan
Japan (country) introduced
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 189)
Mexico
Mexico
Mexico (United Mexican States) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
South America (Pacific rim)
South America (Pacific rim)
Perú (Republic of)   Missouri Botanical Garden (2013)
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
La Réunion (France)
La Réunion Island
La Réunion Island introduced
invasive
Meyer, Jean-Yves/Lavergne, Christophe (2004) (p. 346)
Also reported from
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
United States (continental except west coast)
United States (other states)
United States (other states) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (continental except west coast)
United States (other states)
USA (Florida) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)


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This page was created on 28 JAN 2010 and was last updated on 4 DEC 2010.