Pacific Island Ecosystems at Risk (PIER)

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Dichondra micrantha
Urb., Convolvulaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

Chinese: ma ti jin, xiao jin qián

English: Asian ponysfoot, Carolina dichondra, dichondra, false pennywort, galenga-grass, kidneyweed, lawnleaf, Mercury Bay weed

Japanese: aoi-goke

Spanish: alfombra

Habit:  herb

Description:  "Perennial herb, with most parts densely hairy; hairs white, appressed, forked. Stems stoloniferous, freely branching, purplish, forming extensive mats or low cushions to 5 cm high. Leaf internodes 1-2 cm long; petioles erect or nearly so, to 6 cm long, short on very exposed stolons. Lamina (5)-10-30 mm in diameter, suborbicular to reniform, membranous, glabrous or nearly so and dull above, with appressed hairs below; veins raised beneath, not impressed above; base broad-cordate; apex rounded or slightly emarginate. Peduncles 5-15 mm long, bract very small and inconspicuous. Calyx c. 2 mm long, densely hairy outside; lobes alternately linear-oblong and ovate-oblong, obtuse to subacute. Corolla 4-5 mm in diameter, greenish white, lobed to c. 1/2 way; lobes narrow-oblong to lanceolate, = calyx lobes at anthesis, becoming > calyx lobes. Anthers violet or violet-margined. Ovary densely hairy. Capsule usually deeply 2-lobed, with 1-(2) seeds per loculus, 2-2.5 x 4-5 mm, more rarely only 1 locule developed, indehiscent, slightly to strongly hispid, > calyx. Fruiting calyx to 3 mm long, fruiting peduncle recurved. Seeds c. 1.5 mm long, yellow to dark brown"  (Webb et al., 1988; p. 555).

Description from the Flora of China online.

Habitat/ecology:  In New Zealand, "usually a lawn weed.  It has been widely planted as a lawn in warmer parts of N.Z. and in many places it has thrived and spread naturally to a limited extent"  (Webb et al., 1988; p. 555).

Propagation:  Seed and stolons.

Native range:  Southern North America and the West Indies  (Webb et al., 1988; p. 555).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Chile (offshore islands)
Juan Fernández Islands
Isla Más a Tierra (Robinson Crusoe Island) introduced
invasive
cultivated
Atkinson, Rachel/Sawyer, John (2011)
State of Hawaii
Hawaiian Islands
Lāna‘i Island introduced
invasive
Oppenheimer, Hank (2010) (p. 34)
Voucher cited: Oppenheimer H50818 (BISH, PTBG)
State of Hawaii
Hawaiian Islands
Maui Island introduced
invasive
Oppenheimer, Hank L./Bartlett, Randal T. (2002) (p. 6)
Vouchers cited: West Maui: Oppenheimer H40011 (BISH); East Maui: Iltis H444-A (BISH), Oppenheimer H40003, Oppenheimer H60024 (PTBG)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Oppenheimer, Hank L./Bartlett, Randal T. (2002) (p. 6)
Voucher cited: Oppenheimer & J. Kunna H60038 (BISH)
New Caledonia
New Caledonia
New Caledonia Islands introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
China
China
China (People's Republic of) introduced
invasive
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Grasslands on mountain slopes, roadsides; 1300-2000 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hubei, Hunan, Jiangsu, Jiangxi, ?Qinghai, Sichuan, Xizang, Yunnan, Zhejiang.
Naturalized
Japan
Japan
Japan (country) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Honshu, Kyushu, Shikoku
Naturalized
Japan
Ryukyu Islands
Ryukyu Islands introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
South Korea
South Korea
South Korea (Republic of) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Mexico
Mexico
Mexico (United Mexican States) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Michoacan, Nuevo Leon, Queretaro
New Zealand
New Zealand
New Zealand (country) introduced
invasive
cultivated
Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 555)
Taiwan
Taiwan Island
Taiwan Island introduced
invasive
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Grasslands on mountain slopes, roadsides; 1300-2000 m.
Naturalized
Thailand
Thailand
Thailand (Kingdom of) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
United States (west coast)
United States (west coast states)
USA (California) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Comoros
Comoro Islands
Comoro Islands introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
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
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Georgia, Texas
Naturalized
United States (continental except west coast)
United States (other states)
USA (Florida) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized


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This page was created on 11 FEB 2010 and was last updated on 13 APR 2013.