This table lists all species profiled on PIER with the genus beginning with the letter M. An alphabetical index to all PIER species is also available. Also, the complete alphabetical of all PIER species is available, but it is a large list and may take a while to load on systems with slower internet connections. It includes those of environmental concern (including those that are probably of threat only to islands with high elevations) as well as agricultural and ruderal weeds. Each species is linked by its scientific name to an individual write-up containing relevant information.
Species are listed in alphabetic order. You can browse this list or use the "find" function on your web browser to search by scientific name.
Can't find it here? Check the list of synonyms for other names (the more common synonyms are included below) or search other lists and databases available on the Internet.
Stumped by botanical terms? Here are links to a brief glossary and a search engine for botanical terms.
| Scientific name (+Family) | Often-used other Latin names | Habit |
Present on
Pacific Islands? |
Primarily a threat at high elevations? |
| Macaranga mappa (Euphorbiaceae) | tree | Yes | No | |
| Macaranga tanarius (Euphorbiaceae) | Ricinus tanarius L. | tree | Yes | No |
| Macfadyena unguis-cati (Bignoniaceae) | Bignonia unguis-cati L.; Doxantha unguis-cati (L.) Miers ex Rehder | vine | Yes | No |
| Macroptilium atropurpureum (Fabaceae) | Phaseolus atropurpureus DC. | vine | Yes | No |
| Macroptilium lathyroides (Fabaceae) | Phaseolus lathyroides L. | herb | Yes | No |
| Maesopsis eminii (Rhamnaceae) | tree | Yes | No | |
| Malachra alceifolia (Malvaceae) | herb | Yes | No | |
| Malachra capitata (Malvaceae) | herb | Yes | No | |
| Malva parviflora (Malvaceae) | herb | Yes | No | |
| Malvastrum americanum (Malvaceae) | Malva americana L. | herb | Yes | No |
| Malvastrum coromandelianum (Malvaceae) | Malva coromandeliana L.; Malvastrum tricuspidatum A. Gray | herb | Yes | No |
| Malvastrum tomentosum (Malvaceae) | Malva tomentosa L. | shrub | Yes | No |
| Malvaviscus arboreus (Malvaceae) | shrub | Yes | No | |
| Malvaviscus penduliflorus (Malvaceae) | Malvaviscus arboreus var. penduliflorus (DC.) Schery | shrub | Yes | No |
| Mangifera indica (Anacardiaceae) | tree | Yes | No | |
| Manihot glaziovii (Euphorbiaceae) | Manihot carthagenensis (Jacq.) Müll. Arg. subsp. glaziovii | tree | Yes | No |
| Marrubium vulgare (Lamiaceae) | herb | Yes | No | |
| Marsilea minuta (Marsileaceae) | aquatic fern | No | No | |
| Marsilea quadrifolia (Marsileaceae) | aquatic fern | No | No | |
| Martynia annua (Martyniaceae) | herb | Yes | No | |
| Medicago lupulina (Fabaceae) | herb | Yes | No | |
| Medicago polymorpha (Fabaceae) | herb | Yes | No | |
| Medicago rugosa (Fabaceae) | Medicago elegans Jacq. ex Willd. | herb | Yes | No |
| Medinilla cummingii (Melastomataceae) | shrub | Yes | No | |
| Medinilla heterophylla (Melastomataceae) | vine | Yes | No | |
| Medinilla magnifica (Melastomataceae) | shrub | Yes | No | |
| Medinilla scortechinii (Melastomataceae) | herb | Yes | No | |
| Medinilla venosa (Melastomataceae) | shrub | Yes | No | |
| Melaleuca nesophila (Myrtaceae) | shrub | Yes | No | |
| Melaleuca quinquenervia (Myrtaceae) | tree | Yes | No | |
| Melampodium divaricatum (Asteraceae) | herb | Yes | No | |
| Melastoma candidum (Melastomataceae) | Melastoma septemnervium Lour. | tree | Yes | No |
| Melastoma sanguineum (Melastomataceae) | Melastoma decemfidum Roxb. | shrub/tree | Yes | No |
| Melia azedarach (Meliaceae) | tree | Yes | No | |
| Melica transsilvanica (Poaceae) | grass | No | No | |
| Melicoccus bijugatus (Sapindaceae) | Melicoccus bijuga L. | tree | Yes | No |
| Melilotus albus (Fabaceae) | herb | Yes | No | |
| Melilotus indicus (Fabaceae) | herb | Yes | No | |
| Melinis minutiflora (Poaceae) | Panicum melinus Trin.; Panicum minutiflora (Beauv.) Rasp. | grass | Yes | No |
| Melinis repens (Poaceae) | Rhynchelytrum repens (Willd.) C.E. Hubbard; Tricholaena repens (Willd.) Hitchc.; Tricholaena rosea Nees | grass | Yes | No |
| Melochia corchorifolia (Sterculiaceae) | herb | Yes | No | |
| Melochia umbellata (Sterculiaceae) | Melochia compacta Hochr.; Melochia indica A. Gray | shrub | Yes | No |
| Memecylon floribundum (Melastomataceae) | Melochia caeruleum | shrub | No | No |
| Mentha pulegium (Lamiaceae) | herb | Yes | No | |
| Mentha x piperita (Lamiaceae) | Mentha citrata Ehrh. | herb | Yes | No |
| Merremia aegyptia (Convolvulaceae) | Ipomoea aegyptia L. | vine | Yes | No |
| Merremia bracteata (Convolvulaceae) | vine | Yes | No | |
| Merremia dissecta (Convolvulaceae) | Ipomoea dissecta (Jacq.) Pursh; Ipomoea sinuata Ortega | vine | Yes | No |
| Merremia hederacea (Convolvulaceae) | vine | Yes | No | |
| Merremia hirta (Convolvulaceae) | vine | Yes | No | |
| Merremia pacifica (Convolvulaceae) | vine | Yes | No | |
| Merremia peltata (Convolvulaceae) | Ipomoea peltata (L.) Choisy; Merremia nymphaeifolia (Dietr.) Hall. fil.; Operculina peltata (L.) Hall. fil. | vine | Yes | No |
| Merremia quinquefolia (Convolvulaceae) | Convolvulus quinquefolia L.; Ipomoea quinquefolia L. | vine | Yes | No |
| Merremia tuberosa (Convolvulaceae) | Ipomoea tuberosa L. | vine | Yes | No |
| Merremia umbellata (Convolvulaceae) | vine | Yes | No | |
| Merremia vitifolia (Convolvulaceae) | Convolvulus vitifolius Burm f.; Ipomoea vitifolia Bl. | vine | No | No |
| Metrosideros excelsa (Myrtaceae) | tree | Yes | No | |
| Metrosideros kermadecensis (Myrtaceae) | tree | Yes | No | |
| Miconia calvescens (Melastomataceae) | Merremia magnifica Triana | tree | Yes | No |
| Microlaena stipoides (Poaceae) | Ehrharta stipoides Labill. | grass | Yes | No |
| Mikania cordata (Asteraceae) | vine | No | No | |
| Mikania micrantha (Asteraceae) | vine | Yes | No | |
| Mikania scandens (Asteraceae) | vine | Yes | No | |
| Mimosa diplotricha (Fabaceae) | Mimosa invisa Mart., nom. illeg. | shrub | Yes | No |
| Mimosa pigra (Fabaceae) | shrub | Yes | No | |
| Mimosa pudica (Fabaceae) | herb | Yes | No | |
| Mimosa tenuiflora (Fabaceae) | Acacia tenuiflora Willd.; Mimosa cabrera H. Karst.; Mimosa hostilis (Mart.) Benth. | tree | No | No |
| Mirabilis jalapa (Nyctaginaceae) | herb | Yes | No | |
| Mitracarpus hirtus (Rubiaceae) | Mitracarpus villosus (Sw.) Cham. & Schltdl. ex DC.; Spermacoce villosa Sw. | herb | Yes | No |
| Momordica charantia (Cucurbitaceae) | vine | Yes | No | |
| Monochoria hastata (Pontederiaceae) | aquatic herb | Yes | No | |
| Monochoria vaginalis (Pontederiaceae) | aquatic herb | Yes | No | |
| Montanoa hibiscifolia (Asteraceae) | shrub | Yes | No | |
| Morella cerifera (Myricaceae) | Myrica cerifera L. | tree | Yes | No |
| Morella faya (Myricaceae) | Myrica faya Ait. | tree | Yes | No |
| Moringa oleifera (Moringaceae) | Moringa pterygospera C. F. Gaertn. | tree | Yes | No |
| Mucuna pruriens (Fabaceae) | Dolichos pruriens L.; Stizolobium aterrimum Piper and Tracey; Stizolobium deeringianum Bort.; Stizolobium niveum Kuntze.; Stizolobium pruriens (L.) Medicus. | vine | Yes | No |
| Muntingia calabura (Muntinginaceae) | tree | Yes | No | |
| Murdannia nudiflora (Commelinaceae) | Commelina nudiflora L. | herb | Yes | No |
| Murraya paniculata (Rutaceae) | Chalca spaniculata L.; Murraya exotica L. | shrub/tree | Yes | No |
| Myoporum laetum (Myoporaceae) | tree | No | No | |
| Myriophyllum aquaticum (Haloragaceae) | aquatic herb | Yes | No | |
| Myriophyllum spicatum (Haloragaceae) | aquatic herb | No | No |