Pacific Island Ecosystems at Risk (PIER)

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Dissotis rotundifolia
(Sm.) Triana, Melastomataceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 10 (Go to the risk assessment)

Other Latin names:  Heterotis rotundifolia (Sm.) Jacq.-Fél.; Osbeckia rotundifolia Sm.

Common name(s): [more details]

English: dissotis, pink lady, Spanish shawl, trailing dissotis

Palauan: mesekui

Habit:  herb

Description:  "Decumbent herbs; stems rooting at the nodes, up to 20 cm or more long, moderately hirtellous to pilose.  Leaves ovate to ovate-lanceolate or suborbicular, 1.5-7 cm long, 0.8-4 cm wide, 3-nerved, both surfaces sparsely to densely pilose, margins ciliate and somewhat crenulate, apex acute, base truncate to short-attenuate, petioles 0.5-2.5 cm long.  Pedicels ca. 2 mm long in fruit; hypanthium 5-7 mm long in flower, densely covered with green, spreading, hair-like, linear-oblong appendages 2-4 mm long, apex stellate and sparsely to moderately bristly along their length; calyx lobes lanceolate in fruit, 5-6.5 mm long, 1.5-2 mm wide at base, bristly at apex and externally; petals ca. 20 mm long, ca. 15 mm wide; anthers of larger stamens pink or lavender, 7-8 mm long, connective prolonged 3-4 mm and modified basally into a deeply 2-lobed spur 1.5-2 mm long, anthers of smaller stamens yellow, 5.5-7 mm long, connective prolonged 0.5 mm or less with a 2-lobed spur usually 0.5 mm long.  Fruiting hypanthium cylindrical-campanulate, ca. 1 cm long, ca. 0.9 cm wide.  Seeds ca. 1 mm long, prominently ribbed dorsally with a deep pit on each side."  (Wagner et al., 1999; p. 907).

Habitat/ecology:  In Hawai‘i, "escaping and now sparingly naturalized" (Wagner et al., 1999; p. 907).

Propagation:  Seed, vegetatively from pieces.

Native range:  Tropical Africa; cultivated and naturalized elsewhere (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
American Samoa
Tutuila Islands
Tutuila Island introduced
invasive
Space, James C./Flynn, Tim (2000) (p. 35)
American Samoa
Tutuila Islands
Tutuila Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1992) (voucher ID: PTBG 43367)
Taxon name on voucher: Dissotis rotundifolia
American Samoa
Tutuila Islands
Tutuila Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1992) (voucher ID: PTBG 43953)
Taxon name on voucher: Dissotis rotundifolia
Cook Islands
Southern Cook Islands
Ma‘uke Island cultivated
McCormack, Gerald (2013)
Uncommon.
Cook Islands
Southern Cook Islands
Rarotonga Island cultivated
McCormack, Gerald (2013)
Uncommon.
Cook Islands
Southern Cook Islands
Rarotonga Island   Bishop Museum (Honolulu) (1990) (voucher ID: BISH 664885)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
Federated States of Micronesia
Kosrae Island
Kosrae Island introduced
invasive
Space, James C./Waterhouse, Barbara/Denslow, Julie S./Nelson, Duane/Waguk, Erick E. (2000) (p. 6)
Voucher: BMW 5773 (BISH, BRI)
Federated States of Micronesia
Kosrae Island
Kosrae Island introduced
cultivated
Lorence, David H./Flynn, Timothy (2010) (p. 20)
Voucher cited: Lorence 7888 (PTBG)
Federated States of Micronesia
Kosrae Island
Kosrae Island   Bishop Museum (Honolulu) (2000) (voucher ID: BISH 687711)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
Federated States of Micronesia
Kosrae Island
Kosrae Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1996) (voucher ID: PTBG 21091)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island introduced
invasive
cultivated
Herrera, Katherine/Lorence, David H./Flynn, Timothy/Balick, Michael J. (2010) (p. 111)
Vouchers cited: M.J. Balick 4068 (NY, PTBG), M.J. Balick 4224 (NY, PTBG), D.H. Lorence 9554 (COM, NY, PTBG, US)
Invasive
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1969) (voucher ID: PTBG 38776)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
Federated States of Micronesia
Yap Islands
Yap (Waqab) Island   Wagner, W. L./ Herbst, D. R./Weitzman, A./Lorence, D.H. (2013)
Fiji
Fiji Islands
Mamanuthas Island introduced
cultivated
Smith, Albert C. (1985) (p. 384)
Fiji
Fiji Islands
Viti Levu Island introduced
cultivated
Smith, Albert C. (1985) (p. 384)
Vouchers cited: DA 16213, DA 16728
Fiji
Fiji Islands
Viti Levu Island   Bishop Museum (Honolulu) (1962) (voucher ID: BISH 33247)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
Fiji
Fiji Islands
Viti Levu Island   Bishop Museum (Honolulu) (1969) (voucher ID: BISH 33248)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
Fiji
Fiji Islands
Viti Levu Island   Bishop Museum (Honolulu) (1979) (voucher ID: BISH 619004)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
French Polynesia
Society Islands
Huahine Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Naturalisée
French Polynesia
Society Islands
Moorea Island introduced
invasive
cultivated
Welsh, S. L. (1998) (p. 181)
Voucher cited: Florence 2088
French Polynesia
Society Islands
Moorea Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Naturalisée
French Polynesia
Society Islands
Moorea Island   Bishop Museum (Honolulu) (1981) (voucher ID: BISH 491139)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
French Polynesia
Society Islands
Raiatea (Havai) Island introduced
invasive
cultivated
Welsh, S. L. (1998) (p. 181)
Voucher cited: BRY 25400
French Polynesia
Society Islands
Tahiti Island introduced
invasive
cultivated
Welsh, S. L. (1998) (p. 181)
Vouchers cited: Sachet 1409, Florence 2599
French Polynesia
Society Islands
Tahiti Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
also cv. 'Victoria' and cv. 'Lindenii'
Naturalisée
French Polynesia
Society Islands
Tahiti Island   Bishop Museum (Honolulu) (1982) (voucher ID: BISH 493027)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
Guam
Guam Island
Guam Island introduced
Raulerson, L. (2006) (p. 52)
State of Hawaii
Hawaiian Islands
Hawai‘i (Big) Island introduced
invasive
cultivated
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 907)
Sparingly naturalized.
State of Hawaii
Hawaiian Islands
Kaua‘i Island introduced
invasive
cultivated
Herbarium Pacificum Staff (1996) (p. 5)
Voucher cited: T. Flynn 4885 (BISH)
Escaping from cultivation.
State of Hawaii
Hawaiian Islands
Maui Island introduced
invasive
cultivated
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 907)
Sparingly naturalized.
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
cultivated
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 907)
Sparingly naturalized.
Niue
Niue
Niue Island introduced
Space, James C./Flynn, Tim (2000)
Voucher: Flynn 6709 (PTBG, US, NIUE).  Not found in 2004 by Space et al.
Niue
Niue
Niue Island   Space, James C./Waterhouse, Barbara M./Newfield, Melanie/Bull, Cate (2004) (p. 11)
Not found on this survey.
Niue
Niue
Niue Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2000) (voucher ID: PTBG 30204)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
Palau
Palau (Belau ) (main island group)
Babeldaob Island introduced
invasive
cultivated
Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (pp. 9, 85)
Palau
Palau (Belau ) (main island group)
Babeldaob Island introduced
invasive
cultivated
Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (p. 11)
Vouchers: Lorence 9910 (PTBG, BNM, NY, US), Lorence 9923 (PTBG, BNM, NY)
Palau
Palau (Belau ) (main island group)
Babeldaob Island   Bishop Museum (Honolulu) (1996) (voucher ID: BISH 689752)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
Palau
Palau (Belau ) (main island group)
Babeldaob Island   Beleu National Museum (Republic of Palau. Koror.) (2007) (voucher ID: BNM 4479)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
Palau
Palau (Belau ) (main island group)
Babeldaob Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2008) (voucher ID: PTBG 203)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
Palau
Palau (Belau ) (main island group)
Babeldaob Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2008) (voucher ID: PTBG 216)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
Palau
Palau (Belau ) (main island group)
Babeldaob Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2007) (voucher ID: PTBG 49091)
Taxon name on voucher: Dissotis rotundifolia
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island introduced
invasive
cultivated
Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (pp. 9, 80)
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island introduced
invasive
Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (p. 11)
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island   Bishop Museum (Honolulu) (1988) (voucher ID: BISH 634821)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
Samoa
Western Samoa Islands
Savai‘i Island introduced
invasive
Space, James C./Flynn, Tim (2002) (p. 6)
Samoa
Western Samoa Islands
Upolu Island introduced
invasive
Space, James C./Flynn, Tim (2002) (p. 6)
Voucher: Flynn 6923 (PTBG, US, SAMOA)
Samoa
Western Samoa Islands
Upolu Island   Bishop Museum (Honolulu) (1974) (voucher ID: BISH 417983)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
Samoa
Western Samoa Islands
Upolu Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2002) (voucher ID: PTBG 315)
Taxon name on voucher: Dissotis rotundifolia (Sm.) Triana
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Singapore
Singapore
Singapore (Republic of) introduced
cultivated
Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 36)
Cultivated only

Comments:  Sometimes introduced for soil stabilization.

Very prevalent in Samoa, forming dense mats and shading out other species; occasionally even climbing over small shrubs (Space & Flynn, 2002).


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This page was created on 1 JAN 1999 and was last updated on 18 APR 2013.