| Tamarindus
indica | tamarind | `awa`awa
| Rare |
Non-Native |   |
|
Tanacetum parthenium | feverfew
| |
| Non-Native | |
| Taraxacum officinale
| dandelion |
| Uncommon |
Non-Native |  |
| Tectaria gaudichaudii
| | 'iwa'iwa
lau nui |
Rare | Endemic | |
| Terminalia catappa
| tropical
or Indian almond | kamani
haole, kamani 'ula | Uncommon |
Non-Native |    |
|
Tetramolopium humile ssp. haleakalae | | |
Uncommon | Native |
 |
|
Tetramolopium humile ssp. humile var. humile
| | | | | |
|
Tetramolopium lepidotum ssp. arbusculum |
|
| Historic |
Native | |
| Tetraplasandra
kavaiensis | | 'ohe'ohe |
Uncommon | Native | |
|
Tetraplasandra meiandra var.
mauiensis | | | | |
|
|
Tetraplasandra oahuensis |
| 'ohe mauka |
Uncommon | Native |   |
|
Thalictrum dipterocarpum
| meadow
rue |
| Rare |
Non-Native | |
| Thelypteris
cyatheoides =Christella cyatheoides |
|
kikawaio | | | |
| Thelypteris
dentata = Christella dentata |
downy
wood fern | pai'i'iha | | |
|
| Thelypteris
globulifera = Amauropelta globulifera |
| |
| | |
| Thelypteris
gongylodes = Cyclosorus interruptus |
| | |
| |
| Thelypteris
interrupta = Cyclosorus interruptus | swamp
cyclosorus | neke | | Native | |
| Thelypteris
parasitica = Christella parasitica |
| |
| |
|
| Thespesia
populnea | Portia
tree, portiatree, seaside mahoe | milo |
Uncommon | Native |     |
|
Thlaspi arvense |
field penny-cress, Frenchweed | |
Historic | Non-Native | |
|
Thuja occidentalis |
Eastern white cedar | |
Rare | Non-Native | |
|
Thunbergia alata | black-eyed
Susan vine |
| Encroaching | Non-Native |   |
| Thunbergia fragrans
| white
thunbergia, sweet clockvine | |
Encroaching | Non-Native | |
|
Thunbergia laurifolia
| | |
Encroaching | Non-Native |
|
| Tibouchina
herbacea | glorybush | |
Uncommon | Non-Native |   |
|
Tibouchina urvilleana | | |
Encroaching | Non-Native | |
|
Torulinium odoratum ssp.
auriculatum | |
| Uncommon |
Native | |
| Touchardia
latifolia |
| olona |
Uncommon | Native |
|
| Tournefortia
argentea | tree
heliotrope | |
Rare | Non-Native |    |
|
Trema orientale |
gunpowder tree |
| Unknown |
Non-Native | |
| Trematolobelia
macrostachys | | koli'i | Uncommon | Native | |
| Tridax procumbens
| coat
buttons | |
Uncommon | Non-Native |
|
|
Trifolium arvense var. arvense |
rabbit-foot clover | |
Uncommon | Non-Native | |
|
Trifolium dubium |
small hop-clover, European yellow clover |
| Uncommon |
Non-Native | |
|
Trifolium pratense var. sativum |
red clover | |
Rare | Non-Native |
|
|
Trifolium procumbens | | | | | |
|
Trifolium repens var. repens |
white clover |
| Uncommon |
Non-Native | |
|
Trisetum glomeratum |
mountain pili |
he`u-pueo, pili uka |
Uncommon | Native |
  |
|
Triumfetta semitriloba | Sacramento
bur | |
Uncommon | Non-Native | |
|
Ulex europaeus
| gorse | |
Uncommon | Non-Native | |
|
Uncinia brevicaulis | | |
Rare | Native |
|
|
Uncinia uncinata |
| |
Common | Native | |
| Urena
lobata | aramina
|
| | Non-Native
| |
| Urera glabra
| | opuhe,
hopoe, hona | Uncommon |
Native |
|
|
Urera sandvicensis | | | | | |
|
Vaccinium berberidifolium
|
|
|
|
| |
| Vaccinium calycinum
| | 'ohelo,
'ohelo kau la'au | Common |
Native |
|
|
Vaccinium dentatum | | 'ohelo |
Uncommon | Native |   |
| Vaccinium reticulatum
|
| 'ohelo, 'ohelo
'ai | Common |
Native | |
| Vandenboschia
cyrtotheca | | palai
hihi | Rare |
Native |
  |
| Vandenboschia
davallioides | | palai
hihi | Common |
Native |
  |
| Vandenboschia
draytoniana |
| palai hihi |
|
Native | |
|
Verbascum thapsus |
common mullein |
| Historic |
Non-Native | 
|
| Verbena
litoralis | vervain | owi,
oi | Uncommon |
Non-Native |  |
| Verbesina encelioides
| crown-beard | |
Rare | Non-Native |   |
| Vernonia cinerea
| ironweed | |
|
Non-Native | |
| Veronica arvensis
| corn
speedwell | |
Rare | Non-Native | |
|
Vicia sativa ssp. nigra |
spring vetch |
| Rare |
Non-Native |
|
| Vigna
marina | beach
pea | mohihihi,
lemuomakili, nanea, 'okolemakili, puhili, puhilihili, pulihilihi, wahine 'oma'o |
Uncommon | Native |    |
| Viola chamissoniana
ssp.
tracheliifolia | | pamakani,
'olopu | Rare |
Native |  |
| Viola maviensis
| Maui
violet | |
Rare | Native |
 |
|
Vitis
sp. 1 | grapevine,
grape | |
Historic | Non-Native |
 |
| Vittaria rigida
= Haplopteris elongata |
| | | |
  |
| Vulpia bromoides
| brome
fescue | |
Uncommon | Non-Native | |
|
Vulpia myuros |
rat tail fescue |
| Uncommon |
Non-Native |
|
| Waltheria
indica | basora-prieta,
uhaloa | hi'aloa,
'uhaloa | Uncommon |
Native |  |
|
Watsonia borbonica | | |
Rare | Non-Native | |
|
Wedelia trilobata |
wedelia |
| | |   |
|
Wikstroemia monticola
|
| 'akia, kauhi |
Uncommon | Native | |
| Wikstroemia
oahuensis var.
oahuensis | | 'akia,
kauhi | Uncommon |
Native | |
|
Wikstroemia
sp. 1 | false
ohelo | `akia
| Uncommon |
Native |
|
|
Wikstroemia uva-ursi var.
uva-ursi | | 'akia,
kauhi | Unknown |
Native |     |
|
Wikstroemia villosa |
| `akia |
Unconfirmed | Native |
|
| Xanthium
strumarium var.
canadense | cocklebur | kikania |
Uncommon | Non-Native |  |
|
Xanthosoma robustum |
common `ape |
| Uncommon |
Non-Native | |
| Xiphopteris
saffordii =Lellingeria daffordii |
| kihe |
|
| |
| Xylosma hawaiiense
|
| maua |
Rare | Native |    |
| Youngia
japonica | oriental
hawksbeard | |
Uncommon | Non-Native |   |
| Zanthoxylum
kauaense | | a'e,
manele, hea'e | Rare |
Native |
|
| Zingiber
zerumbet | shampoo
ginger, wild ginger | 'awapuhi,
'awapuhi kuahiwi | Uncommon |
Polynesian |    |
| | | | | |
