Pacific Island Ecosystems at Risk (PIER)

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Mecardonia procumbens
(Mill.) Small, Scrophulariaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 7 (Go to the risk assessment)

Other Latin names:  Bacopa procumbens Mill. Greenm.

Common name(s): [more details]

English: baby jump-up, waterhyssop

Habit:  herb

Description:  "Plants annual or perennial, glabrous, branched from the base, prostrate to suberect, the stems mostly 30 cm log or less; leaves short-petiolate, ovate or oval, mostly 8-15 mm long, rounded to acute at the apex, acute at the base, serrate, usually blackening when dried; pedicels slender, mostly longer than the leaves; sepals green, the outer ones in age 8-10 mm long, ovate, subacute, obtuse at the base, glabrous; corolla bright yellow, about 1 cm long; capsule oblong, 6-10 mm long" (Standley & Williams, 1973; p. 333).

"Suberect herbs...; stems quadrangular, glabrous; leaves elliptic or shortly ovate-elliptic, crenulate-serrulate, 1-2.5 cm long, 6-12 mm wide; calyx without basal bracteoles; pedicels 4-6 mm long at anthesis, elongating in fruit to 18 mm; corolla yellow, slightly longer than calyx, capsule 2-valved" (Stone, 1970; p. 523).

Habitat/ecology:  A weed of wet or brackish localities (Stone, 1970; p. 523). In New Guinea, "a plant of disturbed land and heavily-grazed grassland, and a weed of cultivation and lawns" (Henty & Pritchard, 1975; p. 146).

Propagation:  Seed

Native range:  Southern United States to Argentina (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Pagan Island   Wagner, W. L./ Herbst, D. R./Weitzman, A./Lorence, D.H. (2013)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Rota Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 248)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Saipan Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 248)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Tinian Island introduced
Raulerson, L. (2006) (p. 61)
Federated States of Micronesia
Chuuk Islands
Namoluk (Nómwunuuk) Atoll   Marshall, Mae/Fosberg, F. R. (1975) (p. 46)
Voucher cited: Marshall 104 (US)
Federated States of Micronesia
Chuuk Islands
Puluwat (Pwonowót) Atoll introduced
invasive
Manner, H. I./Mallon, E. (1989) (p. 58)
Voucher cited: Manner & Mallon 276 (GUAM)
Federated States of Micronesia
Chuuk Islands
Weno (Moen) Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 248)
Federated States of Micronesia
Chuuk Islands
Weno (Moen) Island introduced
Fosberg, F. R./Sachet, M.-H. (1975) (p. 84)
Voucher cited: Rainey 39 (Fo)
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 248)
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island introduced
Glassman, S. F. (1952) (p. 101)
Voucher cited: Glassman 2555 (US)
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island introduced
invasive
Herrera, Katherine/Lorence, David H./Flynn, Timothy/Balick, Michael J. (2010) (p. 136)
As Mecardonia procumbens (Mill.) Pennell. Vouchers cited: F.R. Fosberg 58434 (BISH), S.F. Glassman 2555 (BISH), B.C. Stone 5459 (BISH)
Naturalized
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island introduced
Fosberg, F. R./Sachet, M.-H. (1975) (p. 84)
VoucherS cited: Glassman 2555 (US, BISH), Stone 1960 (UG)
Federated States of Micronesia
Yap Islands
Yap (Waqab) Island   Swarbrick, John T. (1997) (p. 88)
Guam
Guam Island
Guam Island introduced
invasive
Stone, Benjamin C. (1970) (p. 523)
Voucher cited: Stone 4674 (GUAM)
Guam
Guam Island
Guam Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 248)
Nauru
Nauru Island
Nauru Island introduced
invasive
Thaman, R. R./Fosberg, F. R./Manner, H. I./Hassall, D. C. (1994) (p. 195)
Voucher cited: Fosberg 58813 (US)
Palau
Palau (Belau ) (main island group)
Babeldaob Island   Raulerson, L./Rinehart, A. F./Falanruw, M. C. (1996) (p. 35)
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island   Beleu National Museum (Republic of Palau. Koror.) (1979) (voucher ID: BNM 10180)
Taxon name on voucher: Bacopa procumbens (Mill.) Greenm.
Palau
Palau (Belau ) (main island group)
Peleliu (Beliliou) Island introduced
Fosberg, F. R./Canfield, Joan E. (1980) (pp. 197-198)
Voucher cited: Canfield 421 (US)
Palau
Palau (Belau ) (main island group)
Peleliu (Beliliou) Island   Beleu National Museum (Republic of Palau. Koror.) (1978) (voucher ID: BNM 1394)
Taxon name on voucher: Bacopa procumbens (Mill.) Greenm.
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island) introduced
invasive
Henty, E. E./Pritchard, G. H. (1975) (p. 146)
At low altitudes, Morobe District.
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Chile (continental)
Chile
Chile (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Colombia
Colombia
Colombia (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Costa Rica
Costa Rica
Costa Rica (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Ecuador (Mainland)
Ecuador
Ecuador (Republic of) (continental) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
El Salvador
El Salvador
El Salvador (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Guatemala
Guatemala
Guatemala (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Honduras
Honduras
Honduras (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Indonesia
Indonesia
Indonesia (Republic of)   Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 43)
Japan
Japan
Japan (country) introduced
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 188)
Mexico
Mexico
Mexico (United Mexican States) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Nicaragua
Nicaragua
Nicaragua (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Panama
Panama
Panama (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Perú
Perú
Perú (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
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) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Louisana, Texas
United States (continental except west coast)
United States (other states)
USA (Florida) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)


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This page was created on 22 MAY 2017 and was last updated on 30 AUG 2017.