Priority invasive and high-risk species
Species briefs
One page per species: when it has been recorded fruiting, where it grows by island and elevation, how its seed travels, and what that means for the timing of control work.
The state of the evidence, stated first
Of 38 priority species, 16 now have a Hawaiian fruiting calendar — built from field observations where someone photographed the plant and recorded what it was doing. Not one has enough dated Hawaiian herbarium specimens to do the same. 6 can only borrow the shape of their cycle from specimens collected elsewhere, and for 16 nothing can honestly be said yet.
See the field-observation coverage → — how many records exist per species, when they were made, and on which islands.
- Schinus terebinthifoliusAnacardiaceae · 7 Hawaiian specimens · 1 islandsmost monthsFrom field observations
- Leucaena leucocephalaFabaceae · 18 Hawaiian specimens · 4 islandsmost monthsFrom field observations
- Psidium cattleianumMyrtaceae · 8 Hawaiian specimens · 2 islandsmost monthsFrom field observations
- Ardisia ellipticaPrimulaceae · 15 Hawaiian specimens · 4 islandsSep–MarFrom field observations
- Clidemia hirtaMelastomataceae · 3 Hawaiian specimens · 2 islandsmost monthsFrom field observations
- Casuarina equisetifoliaCasuarinaceae · 58 Hawaiian specimens · 5 islandsJun–JanFrom field observations
- Syzygium cuminiMyrtaceae · 23 Hawaiian specimens · 5 islandsOct–FebFrom field observations
- Lantana camaraVerbenaceae · 23 Hawaiian specimens · 2 islandsSep–DecFrom field observations
- Hedychium gardnerianumZingiberaceae · 8 Hawaiian specimens · 2 islandsNov–JanFrom field observations
- Megathyrsus maximusPoaceae · 9 Hawaiian specimens · 5 islandsJan–MarFrom field observations
- Cenchrus setaceusPoaceae · 22 Hawaiian specimens · 4 islandsMar–AprFrom field observations
- Morella fayaMyricaceae · 20 Hawaiian specimens · 5 islandsJun–JulFrom field observations
- Rubus argutusRosaceae · 21 Hawaiian specimens · 4 islandsJul–AugFrom field observations
- Buddleja asiaticaScrophulariaceae · 45 Hawaiian specimens · 5 islandsJan–FebFrom field observations
- Toona ciliataMeliaceae · 15 Hawaiian specimens · 4 islandsDec–FebFrom field observations
- Prosopis pallidaFabaceae · 9 Hawaiian specimens · 2 islandsOct–DecFrom field observations
- Passiflora tarminianaPassifloraceae · 13 Hawaiian specimens · 2 islands—No timing yet
- Pluchea carolinensisAsteraceae · 33 Hawaiian specimens · 6 islands—No timing yet
- Rubus ellipticusRosaceae · 9 Hawaiian specimens · 1 islands—No timing yet
- Verbesina encelioidesAsteraceae · 47 Hawaiian specimens · 6 islandsNov–NovNo timing yet
- Setaria palmifoliaPoaceae · 38 Hawaiian specimens · 5 islandsNov–NovNo timing yet
- Acacia mearnsiiFabaceae · 14 Hawaiian specimens · 5 islandsOct–DecFrom records elsewhere
- Ageratina adenophoraAsteraceae · 34 Hawaiian specimens · 5 islandsMar–MayFrom records elsewhere
- Melinis minutifloraPoaceae · 28 Hawaiian specimens · 5 islands—No timing yet
- Miconia calvescensMelastomataceae · 6 Hawaiian specimens · 2 islands—No timing yet
- Tibouchina herbaceaMelastomataceae · 4 Hawaiian specimens · 1 islands—No timing yet
- Andropogon virginicusPoaceae · 21 Hawaiian specimens · 3 islandsAug–DecFrom records elsewhere
- Grevillea robustaProteaceae · 21 Hawaiian specimens · 5 islands—No timing yet
- Ficus microcarpaMoraceae · 17 Hawaiian specimens · 3 islandsJul–AugFrom records elsewhere
- Ulex europaeusFabaceae · 2 Hawaiian specimens · 2 islandsFeb–AprFrom records elsewhere
- Erigeron karvinskianusAsteraceae · 25 Hawaiian specimens · 5 islandsJun–JulFrom records elsewhere
- Sphaeropteris cooperiCyatheaceae · 0 Hawaiian specimens—No timing yet
- Cortaderia jubataPoaceae · 10 Hawaiian specimens · 1 islands—No timing yet
- Ageratina ripariaAsteraceae · 26 Hawaiian specimens · 4 islands—No timing yet
- Christella dentataThelypteridaceae · 128 Hawaiian specimens · 6 islands—No timing yet
- Panicum maximumPoaceae · 27 Hawaiian specimens · 6 islands—No timing yet
- Paspalum conjugatumPoaceae · 34 Hawaiian specimens · 5 islands—No timing yet
- Falcataria moluccanaFabaceae · 9 Hawaiian specimens · 4 islands—No timing yet