Pacific Island Ecosystems at Risk (PIER)

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Marsilea crenata
C.Presl, Marsileaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Habit:  aquatic fern

Description:  "Rhizome much-branched, scaly towards the tips. Fronds 1-20 cm long, solitary or clustered. Stipes glabrous or sparsely scaly. Leaflets broadly obovate to broadly cuneate, 10-25 mm long, 3-8 mm wide, glabrous or sparsely scaly; outer margin rounded, entire to deeply crenate. Sporocarps clustered; stalks 1-3 mm long, unbranched, glabrous to sparsely scaly; conceptacles 2-3 mm long, scaly, not ribbed; upper surface convex; upper basal tooth long and spine-like; lower basal tooth short, obtuse"  (Flora of Australia online).

Habitat/ecology:  Grows in shallow freshwater and in drying mud and is often found growing in rice paddies and, in Hawai‘i (O‘ahu), in taro patches  (Wilson, 2003; p. 5).

Propagation:  Spores or rhizomes

Native range:  Philippines, Malaysia, Indonesia and Australia  (Wilson, 2003; p. 5).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Wilson, Kenneth A. (2003) (pp. 5-6)
Voucher cited: D. Palmer 2275 (BISH)
Philippines
Philippine Islands
Philippine Islands native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
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)
Northern Territory native
Australian Biological Resources Study (2013)
Australia
Australia (continental)
Queensland native
Australian Biological Resources Study (2013)
China
China
China (People's Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Fujian
Indonesia
Indonesia
Indonesia (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Japan
Japan
Japan (country) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Kyushu
Japan
Ryukyu Islands
Ryukyu Islands native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Malaysia
Malaysia
Malaysia (country of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Taiwan
Taiwan Island
Taiwan Island native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Thailand
Thailand
Thailand (Kingdom of) native
U.S. Dept. Agr., Agr. Res. 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 12 FEB 2010 and was last updated on 14 MAR 2010.