Pacific Island Ecosystems at Risk (PIER)

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Geranium pusillum
L., Geraniaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

Chinese: ai lao guan cao

English: small cranesbill, small geranium, small-flowered crane's-bill

Habit:  herb

Description:  "Annual herbs from thin taproots; flowering stems decumbent to ascending, 1.5-5 dm long, often branched, puberulent and sometimes also glandular puberulent.  Leaves opposite and basal, blades suborbicular to reniform, usually 0.5-2 cm long, 1-3 cm wide, puberulent and sometimes also glandular puberulent especially on lower surface, deeply palmately 3-5-lobed, the lobes oblong-cuneate, these again divided, petioles 1-4 cm long, stipules lanceolate, 1-3 mm long, ciliate with long, simple hairs.  Flowers usually in pairs in the leaf axils, peduncles 1-2 cm long, pedicels 0.5-1 cm long, puberulent and glandular puberulent; sepals elliptic to oblong, 3-4 mm long, puberulent and also glandular puberulent, especially when younger, ciliate with stiff, simple hairs, apex acute or bluntly mucronate; petals pale purple to pink, narrowly obovate, 2-4 mm long; stylar column elongating to 5-9 mm long in fruit, not with a narrower apical portion.  Carpel bodies ca. 2 mm long, finely and densely puberulent, the surface smooth.  Seeds brown, ca. 1 mm long, the surface smooth"  (Wagner et al., 1999; p. 734).

Description from Flora of China online.

Habitat/ecology:  In New Zealand, "waste places around houses, farmyards, railway yards, lawns, cultivated arable land, rough pastures"  (Webb et al., 1988; p. 730).

Propagation:  Seed

Native range:  Temperate Eurasia (Wagner et al., 1999; p. 734).

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
Atkinson, Rachel/Sawyer, John (2011)
Chile (offshore islands)
Juan Fernández Islands
Isla Más a Tierra (Robinson Crusoe Island) introduced
invasive
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (pp. 460, 464-465, 554)
Chile (offshore islands)
Juan Fernández Islands
Isla Más Afuera (Alejandro Selkirk Island) introduced
invasive
Atkinson, Rachel/Sawyer, John (2011)
Chile (offshore islands)
Juan Fernández Islands
Isla Más Afuera (Alejandro Selkirk Island) introduced
invasive
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (pp. 460, 464-465, 554)
Chile (offshore islands)
Juan Fernández Islands
Isla Santa Clara introduced
invasive
Atkinson, Rachel/Sawyer, John (2011)
Chile (offshore islands)
Juan Fernández Islands
Isla Santa Clara introduced
invasive
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (pp. 460, 464, 554)
Voucher cited: Danton I(5/342)1685
State of Hawaii
Hawaiian Islands
Hawai‘i (Big) Island introduced
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 734)
Single collection, perhaps no longer persisting. Voucher cited: Faurie 856 (BISH)
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
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Canada (British Colombia)
Province of British Columbia
Canada (British Columbia) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
Japan
Japan
Japan (country) introduced
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 185)
New Zealand
New Zealand
New Zealand (country) introduced
invasive
Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 730)
Taiwan
Taiwan Island
Taiwan Island introduced
invasive
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
"Open habitats, dry grassland, cultivated and waste places; 1800-2300 m".
United States (west coast)
United States (west coast states)
USA (Oregon) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (west coast)
United States (west coast states)
USA (California) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (west coast)
United States (west coast states)
USA (Washington) introduced
U.S. Dept. Agr., Nat. Res. Cons. 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
Canada (except British Colombia)
Canada
Canada (country) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (continental except west coast)
United States (other states)
United States (other states) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)


Need more info? Have questions? Comments? Information to contribute? Contact PIER! (pier@hear.org)

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This page was created on 15 DEC 2010 and was last updated on 28 DEC 2010.