| Tamarindus
indica | tamarind |  |
Rare | Non-Native |   |
| Taraxacum officinale
| dandelion |  |
Uncommon | Non-Native |   |
| Tectaria cicutaria
ssp.
gaudichaudii |  | 'iwa'iwa
lau nui |  |
Endemic |  |
| Tectaria gaudichaudii
|  | 'iwa'iwa
lau nui |
Rare | Endemic |  |
| Tephrosia purpurea
var.
purpurea |  | 'auhuhu,
ahuhu, 'auhola, hola | Rare |
Polynesian |  |
| Terminalia catappa
| tropical
or Indian almond | kamani
haole, kamani 'ula | Common |
Non-Native |      |
| Tetragonia tetragonioides
| New
Zealand Spinach |  |
Rare | Non-Native |  |
| Tetramolopium
rockii |  |  |
Rare | Endemic |    |
| Tetramolopium
rockii var.
rockii |  |  |
Rare | Endemic |  |
| Tetramolopium
sylvae |  |  |
Rare | Native |  |
| Tetraplasandra
hawaiensis |  | 'ohe |
Rare | Native |     |
| Tetraplasandra
kavaiensis |  | 'ohe'ohe |
Uncommon | Native |  |
| Tetraplasandra
oahuensis |  | 'ohe
mauka | Uncommon |
Native |    |
| Thelypteris
cyatheoides = Christella cyatheoides |  | kikawaio |  |  |  |
| Thelypteris
dentata = Christella dentata |
downy
wood fern | pai'i'iha |  |  |  |
| Thelypteris
interrupta = Cyclosorus interruptus | swamp
cyclosorus | neke |  | Native |  |
| Thelypteris
parasitica = Christella parasitica |
 |  |  |  |  |
| Thelypteris
sandwicensis = Dryopteris sandwicensis |
 |  |  |  |  |
| Thespesia populnea
| Portia
tree, portiatree, seaside mahoe | milo |
Rare | Native |        |
| Thevetia peruviana
| bestill tree, yellow oleander | nohomalie |
Uncommon | Non-Native |     |
| Thunbergia fragrans
| white
thunbergia, sweet clockvine |  |
Rare | Non-Native |  |
| Tibouchina herbacea
| glorybush |  |
Rare | Non-Native |    |
| Touchardia latifolia
|  |  |
Uncommon | Native |  |
| Tournefortia
argentea | tree heliotrope |  |
Uncommon | Non-Native |      |
| Trematolobelia
macrostachys |  | koli'i | Uncommon | Native |  |
| Trichachne insularis
|  |  |
 |
 |  |
| Tridax procumbens
| coat
buttons |  |
Uncommon | Non-Native |  |
| Trifolium sp. | rabbit-foot
clover |  |
 |
 |  |
| Triumfetta rhomboidea
| bur
bush |  |
Rare | Non-Native |  |
| Triumfetta semitriloba
| Sacramento
bur |  |
Rare | Non-Native |  |
| Turnera ulmifolia
| yellow
alder |  |
Uncommon | Non-Native |  |
| Urera glabra
|  | opuhe,
hopoe, hona | Rare |
Native |  |
| Urera sandvicensis
|  |  |
 |
 |  |
| Vaccinium calycinum
|  | 'ohelo,
'ohelo kau la'au | Common |
Native |  |
| Vaccinium dentatum
|  | 'ohelo |
Common | Native |    |
| Vaccinium reticulatum
|  | 'ohelo,
'ohelo 'ai | Rare |
Native |  |
| Vandenboschia
cyrtotheca |  | palai
hihi | Uncommon |
Endemic |
   |
| Vandenboschia
davallioides |  | palai
hihi | Rare |
Native |
   |
| Vandenboschia
draytoniana |  | palai
hihi |  |
Native |  |
| Verbena litoralis
| vervain | owi,
oi | Uncommon |
Non-Native |    |
| Verbesina encelioides
| crown-beard |  |
Uncommon | Non-Native |    |
| Vernonia cinerea
| ironweed |  |
 |
Non-Native |  |
| Veronica arvensis
| corn
speedwell |  |
Uncommon | Non-Native |  |
| Veronica serpyllifolia
| thyme-leaved
speedwell |  |
Rare | Non-Native |  |
| Vigna marina
| beach
pea | mohihihi,
lemuomakili, nanea, 'okolemakili, puhili, puhilihili, pulihilihi, wahine 'oma'o |
Uncommon | Native |      |
| Vigna owahuensis
|  |  |
 |
Native |  |
| Viola chamissoniana
ssp.
robusta |  | pamakani,
'olopu | Uncommon |
Native |  |
| Viola chamissoniana
ssp.
tracheliifolia |  | pamakani,
'olopu | Rare |
Native |  |
| Viola maviensis
|  |  |
Rare | Native |  |
| Vitex ovata |  |  |
 |
 |  |
| Vitex rotundifolia
| beach
vitex | pohinahina,
kolokolo kahakai, hinahina kolo, manawanawa |
Rare | Native |    |
| Vitex trifolia
|  |  |
 |
 |  |
| Vittaria elongata
= Haplopteris elongata |
 | 'ohe'ohe,
mana |  |
 |
   |
| Vulpia bromoides
| brome
fescue |  |
Rare | Non-Native |  |
| Wahlenbergia
gracilis |  |  | Uncommon | Non-Native |  |
| Waltheria americana
|  |  |
 |
 |   |
| Waltheria indica
| basora-prieta,
uhaloa | hi'aloa,
'uhaloa | Uncommon |
Native |  |
| Wikstroemia forbesii
|  | 'akia,
kauhi | Rare |
Native |  |
| Wikstroemia oahuensis
var.
oahuensis |  | 'akia,
kauhi | Abundant |
Native |  |
| Wikstroemia uva-ursi
var.
uva-ursi |  | 'akia,
kauhi | Rare |
Native |        |
| Wollastonia
integrifolia |  |  |
 |
 |  |
| Xanthium saccharatum
| cocklebur |  |
 |
 |  |
| Xanthium strumarium
var.
canadense | cocklebur | kikania |
Rare | Non-Native |   |
| Xiphopteris
saffordii = Lellingeria saffordii |
 | kihe |
 |
 |  |
| Xylosma hawaiiense
|  | maua |
Rare | Native |      |
| Youngia japonica
| oriental
hawksbeard |  |
Common | Non-Native |    |
| Zanthoxylum
dipetalum |  | kawa'u,
kawa'u kua kuku kapa | Rare |
Native |    |
| Zanthoxylum hawaiiense
|  | a'e,
manele, hea'e | Rare |
Native |  |
| Zanthoxylum kauaense
|  | a'e,
manele, hea'e | Rare |
Native |  |
| Zingiber zerumbet
| shampoo
ginger, wild ginger | 'awapuhi,
'awapuhi kuahiwi | Uncommon |
Polynesian |      |
| Zoysia sp. |  |  |
 |
Non-Native |   |
 |  |  |  |  |  |