Pacific Island Ecosystems at Risk (PIER)

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Cryptostegia madagascariensis
Bojer ex decne., Apocynaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 13 (Go to the risk assessment)

Common name(s): [more details]

English: Madagascar rubbervine

Habit:  vine

Description:  "Vine to subshrubStems with few, prominent lenticels.  Lamina elliptic, up to 9.2 cm long and 5.2 cm wide, glabrous or with indumentum on both sides or adaxial side only; secondary veins 14-16 per side of midrib; tip shortly acuminate; base truncate; petiole 3.7-16.6 mm long, 0.6-2.9 mm diameter.  Cyme with 1-4 fasicicles.  Flowers 3-4 cm long, 5-6 cm diameter; pedicels 3.1-7.7 mm long, 2.4-3.8 mm diameter, glabrous or with sparse indumentum.  Corolla pale pink; tube 12-23 mm long, 6-12.3 mm diameter; lobes 24-41.4 mm long, 12-24.6 mm wide.  Calyx lobes lanceolate-ovate, 9-14 mm long, 3.5-6.9 mm wide.  Corolline corona of 5 entire filaments in throat of tube, each filament 6-8.5 mm long.  Staminal column ca 3 mm long, 3-4 mm diameter; anthers 3-5 mm long, 1.5-2 mm wide.  Translators lanceolate, ca 2.5 mm long and 1 mm wide.  Style-head conical, ca 3 mm long and 2 mm diameter.  Ovaries ca 3 mm long and 1 mm wide.  Follicles fusiform-ovoid, 5.8-9.9 cm long, 1.6-4 cm diameter.  Seeds 5.5-8.9 mm long, 1.8-3.5 mm long; coma white, 10.8-34.3 mm long"  (Marohasy and Forster, 1991; pp. 575-576).

Habitat/ecology:  Dry forest, roadsides, moist forest, rainforest openings at low elevations.  "C. madagascariensis occurs over a wide latitudinal range in western Madagascar with annual rainfall between 600 and 1800 mm.  Plants occur naturally in riverine and seasonally flooded forests.  The weedy aggressiveness of this species has been favored by the widespread destruction of forests and it may be dominant in many disturbed situations.  It is common on hillsides and along gullies in the secondary savannahs which dominate western Madagascar" (Marohasy and Forster, 1991; pp. 575-576).

Propagation:  Wind- and water-dispersed seed.

Native range:  Madagascar (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Cook Islands
Northern Cook Islands
Penrhyn (Tongareva) Island cultivated
McCormack, Gerald (2013)
Cook Islands
Southern Cook Islands
‘Atiu Island   McCormack, Gerald (2013)
Cook Islands
Southern Cook Islands
Mangaia Island   McCormack, Gerald (2013)
Cook Islands
Southern Cook Islands
Rarotonga Island   McCormack, Gerald (2013)
State of Hawaii
Hawaiian Islands
Hawai‘i (Big) Island introduced
invasive
cultivated
Parker, James L./Parsons, Bobby (2012) (p. 57)
Voucher cited: J. Parker & R. McGuire BIED21 (BISH)
State of Hawaii
Hawaiian Islands
Moloka‘i Island introduced
invasive
cultivated
Staples, George W./Herbst, Derral R./Imada, Clyde T. (2006) (p. 6)
Voucher cited: L. Buchanan s.n. (BISH 705004)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Frohlich, Danielle/Lau, Alex (2008) (pp. 3-4)
Voucher cited: A. Lau & D. Frohlich 2007042702 (BISH)
Palau
Palau (Belau ) (main island group)
Babeldaob Island introduced
cultivated
Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (p. 85)
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island introduced
cultivated
Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (p. 80)
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)
Queensland introduced
cultivated
Csurhes, S./Edwards, R. (1998) (p. 104)
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Mauritius
Mautitius Islands (Mauritius and Rodrigues)
Mauritius Island native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Seychelles
Seychelles Islands
Seychelles Islands 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)
USA (Florida) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized

Comments:  Some naturalization in the Northern Territory, Australia.

See also Cryptostegia grandiflora.


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This page was created on 1 JAN 1999 and was last updated on 17 MAR 2013.