Click on map for details about points. IDnature guides Checklist Australia Flora North American Invasives Links Associates Missouri Botanical Garden We parsed the following live from the Web into this page. Such content is managed by its original site and not cached on Discover Life. Please send feedback and corrections directly to the source. See original regarding copyrights and terms of use. PIER Names Scientific source: Integrated Taxonomic Information System Supported by National Biological Information Infrastructure National Science Foundation Associates · map Family Scientific name @ source (records) Aphididae   Rhopalosiphum nymphaeae @ AMNH_PBI (3) go to Discover Life's Facebook group Following modified from PIER    Top | See original Pacific Island Ecosystems at Risk (PIER)   [   PIER species lists  ]   [   PIER home  ] Monochoria hastata (L.) Solms-Laub., Pontederiaceae Click on an image for links to BIGGER PICTURES Present on Pacific Islands?   yes Primarily a threat at high elevations?   no Common name(s): [ more details ] Chinese : jian ye yu jiu hua English : arrow-leaf monochoria, hastate-leaf pondweed, monochoria Tagalog : calaboa Habit:   aquatic herb Description:   Genus: Glabrous palustrine herbs , with obliquely erect stems arising from a suberect or creeping rhizome , the leaves radical, long-petiolate; inflorescence racemiform or subumbelliform, the flowers deflexed after anthesis, the 3 inner tepals the broader; 5 stamens with small, yellow anthers, the sixth with a longer filament with a lateral tooth and a larger, blue anther; fruit a loculicidally dehiscent capsule." (Smith, 1979; p. 175). Species:   "A smooth, erect, aquatic, perennial herb , 30 to 100 cm tall; with a well-developed, branched rhizome ; old plants form large groups which may be connected by underground stolons; leaves of mature plants 5 to 25 cm long, 4 to 20 cm wide, almost always with a sagittate or hastate, rarely  with a cordate, base, basal lobes diverging, either with acuminate tips or not, borne on long sheathlike petioles; inflorescence in spikelike racemes; flowers 15 to 60, not expanding simultaneously, lower flower stalks (pedicels) 15 to 30 mm long, higher ones 7 to 20 mm; perianth light blue, 15 to 18 mm long; fruit enclosed by the perianth, about 1 cm long; seeds numerous, light brown, with faint longitudinal lines, blunt at one end, rounding at the other, minute"  (Holm et al ., 1977; p. 340). Key to species: M. vaginalis : " Rhizome short; leaf blades of adult plants emersed, ovate-oblong to broadly ovate, obtuse or rounded or truncate-cordate at base, 2-12.5 x 0.5-10 cm, the basal lobes if present broadly rounded; flowers 3-25, expanding simultaneously or essentially so; perianth 11-15 mm long." M. hastata:   " Rhizome well developed, branched; leaf blades of adult plants usually with a sagittate or hastate base, 7-25 x 5-20 cm, the basal lobes divergent; flowers 15-60, not expanding simultaneously; perianth 15-18 mm long" (Smith, 1979; p. 175). Habitat/ecology:   "In Java, M. hastata grows from 0 to 700 m elevation in freshwater pools, mudflats in rivers, ditches and rice fields, and along canal banks (Backer and Bakhuizen van den Brink, Jr. 1968).  In Fiji, it grows in shallow water, swampy ground, open drains, rice fields, or in very wet soils (Parham, 1958)" (Holm et al ., 1977; p. 340). In Fiji, "sparsely cultivated" (Smith, 1979; p. 175). Propagation:   Seed. "Many seeds are produced by each plant" (Holm et al ., 1977; p. 340). Native range:   Southeastern Asia and Malesia (Smith, 1979; p. 175), 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 Fiji Fiji Islands Viti Levu Island introduced cultivated Smith, Albert C. (1979) (p. 175) Voucher cited: DA 12290 New Guinea (Indonesia and Papua New Guinea) New Guinea Island New Guinea Island native U.S. Dept. Agr., Agr. Res. Serv. (2013) Philippines Philippine Islands Philippine Islands native U.S. Dept. Agr., Agr. Res. Serv. (2013) Philippines Philippine Islands Philippine Islands   Merrill, Elmer D. (1925) (p. 200) In open wet lands, swamps, etc., at low and medium altitudes. 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 U.S. Dept. Agr., Agr. Res. Serv. (2013) Cambodia Cambodia Cambodia (Kingdom of) native U.S. Dept. Agr., Agr. Res. Serv. (2013) China China China (People's Republic of) native Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013) Pools, rice fields, ditches; 100-700 m. Guangdong, Guizhou, Hainan, Yunnan China China Hong Kong native Wu, Te-lin (2001) (p. 356) In paddy fields and ponds. Indonesia Indonesia Indonesia (Republic of) native U.S. Dept. Agr., Agr. Res. Serv. (2013) Java Malaysia Malaysia Malaysia (country of) native U.S. Dept. Agr., Agr. Res. Serv. (2013) Singapore Singapore Singapore (Republic of) native Waterhouse, D. F. (1993) (pp. 67, 78) Singapore Singapore Singapore (Republic of) uncertain if introduced invasive Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 61) Weed of uncertain origin Thailand Thailand Thailand (Kingdom of) native U.S. Dept. Agr., Agr. Res. Serv. (2013) Vietnam Vietnam Vietnam (Socialist Republic of) native U.S. Dept. Agr., Agr. Res. Serv. (2013) Comments:   An ornamental used in water gardens (Smith, 1979; p. 175). Control:   If you know of control methods for Monochoria hastata, please let us know . Need more info? Have questions? Comments? Information to contribute? Contact PIER! (pier@hear.org)   [   PIER species lists  ]   [   PIER home  ] This page was created on 18 AUG 2002 and was last updated on 15 AUG 2013. Updated: 2024-04-19 21:44:47 gmt Discover Life | Top © Designed by The Polistes Corporation