Barleria lupulina Lindl., Acanthaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 10 (Go to the risk assessment)

Common name(s): [more details]

English: hophead Philippine violet

Habit:  shrub

Description:  "Erect shrub; stems and leaves glabrous; spines 3 in lower axils, 2 deflexed ca 1-2 cm long, 1 shorter and upright. Leaves narrowly obovate, spine-tipped; lamina 3.5-9 cm long, 0.8-1.2 cm wide; petiole 2-3 mm long. Inflorescence a terminal spike with overlapping bracts; bracts broadly ovate, 15 mm long, shortly mucronate, green with purple upper half, very shortly pubescent all over, cup-shaped-glandular at base; bracteoles lanceolate, ca 5.5 mm long, sparsely glandular. Calyx segments spine-tipped, pubescent, lanceolate; outer 10 mm long, inner ca 8 mm long. Corolla yellow, finely eglandular pubescent outside; tube ca 3 cm long; lobes ca 1 cm long. Longer stamen filaments ca 2 cm long; shorter stamens fertile. Style ca 3 cm long, glabrous. Capsule not seen" (Du Puy, 1993; p. 383).

Habitat/ecology:  Roadsides and disturbed areas, to 1000 ft. elevation.  "Persistent an invasive in open woodland habitats and along watercourses" (Smith, 2002; p. 27).

Propagation:  "Seed is spread short distances when capsules rupture and by water. Spread by humans as ornamental plantings and in discarded garden refuse" (Smith, 2002; p. 29).

Native range:  Native to Madagascar and India, widely naturalized elsewhere (Staples & Herbst, 2005; p. 83).

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Federated States of Micronesia Kosrae Island	Kosrae Island	introduced cultivated	Lorence, David H./Flynn, Timothy (2010) (p. 11)
Fiji Fiji Islands	Viti Levu Island	introduced cultivated	Smith, Albert C. (1991) (p. 125) Vouchers cited: DA 16756, DA 16462
Fiji Fiji Islands	Viti Levu Island		Bishop Museum (Honolulu) (1969) (voucher ID: BISH 34227) Taxon name on voucher: Barleria lupulina Lindl.
State of Hawaii Hawaiian Islands	O‘ahu Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 170) Occasional escape.
Palau Palau (Belau ) (main island group)	Babeldaob Island	introduced cultivated	Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (pp. 15, 84)
Palau Palau (Belau ) (main island group)	Babeldaob Island	introduced cultivated	Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (p. 18)
Palau Palau (Belau ) (main island group)	Peleliu (Beliliou) Island	introduced cultivated	Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (pp. 8, 18) Voucher: Lorence 9765 (PTBG, BNM, NY, TAMU, US)
Palau Palau (Belau ) (main island group)	Peleliu (Beliliou) Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2008) (voucher ID: PTBG 57) Taxon name on voucher: Barleria lupulina Lindl.

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)	Australia (continental)	introduced invasive cultivated	Csurhes, S./Edwards, R. (1998) (p. 96) Garden escape.
Australia Australia (continental)	Northern Territory	introduced invasive cultivated	Smith, Nicholas M. (2002) (p. 27)
Australia Australia (continental)	Queensland	introduced invasive cultivated	Smith, Nicholas M. (2002) (p. 27)
China China	Hong Kong	introduced cultivated	Wu, Te-lin (2001) (p. 251) Ornamental.
Singapore Singapore	Singapore (Republic of)	introduced cultivated	Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 18) Cultivated only
Timor-Leste Timor-Leste	East Timor Island	introduced invasive	Waterhouse, Barbara (year unknown)

Indian Ocean
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Australia (Indian Ocean offshore islands) Christmas Island Group	Christmas Island	introduced invasive cultivated	Swarbrick, J. T. (1997) (p. 105) Naturalized
Australia (Indian Ocean offshore islands) Christmas Island Group	Christmas Island	introduced	Orchard, Anthony E., ed. (1993) (p. 16)
La Réunion (France) La Réunion Island	La Réunion Island	introduced invasive	Lorence, David (year unknown)
Mauritius Mautitius Islands (Mauritius and Rodrigues)	Mauritius Island	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Seychelles Seychelles Islands	Seychelles Islands	introduced	Invasive Species Specialist Group (2017)

Comments:  Invasive in Timor and Queensland, Australia (Barbara Waterhouse, pers. com.). Cultivated and some naturalization in Hawai‘i (Wagner et al., 1999; p. 170).

Control:  If you know of control methods for Barleria lupulina, please let us know.