- Abrus precatorius – Rosary Pea
- Ageratum spp. – Ageratum
- Ananas bracteatus – Red Pineapple
- Ananas comosus – Pineapple
- Barleria repens – Coral Creeper
- Bougainvillea spp. – Bougainvillea
- Buddleja asiatica – Dogtail
- Calathea burle-marxii – Ice Blue Calathea
- Commelina diffusa – Climbing Dayflower
- Cordyline fruticosa – Ti
- Desmodium intortum – Greenleaf Ticktrefoil
- Dichorisandra thyrsiflora – Blue Ginger
- Dioscorea bulbifera – Air Yam
- Emilia sonchifolia – Lilac Tasselflower
- Ipomoea cairica – Mile A Minute Vine
- Ipomoea indica – Oceanblue Morning-glory
- Ipomoea triloba – Littlebell
- Justicia betonica – Squirrel's Tail
- Melochia umbellata – Melochia
- Musa acuminata – Banana
- Musa ornata – Flowering Banana
- Otacanthus caeruleus – Brazilian Snapdragon
- Oxalis debilis var. corymbosa – Pink Wood Sorrel
- Pluchea carolinensis – Cure For All
- Plumbago auriculata – Plumbago
- Rotheca myricoides – Blue Butterfly Bush
- Scaevola sericea – Beach Naupaka
- Solanum americanum – American Black Nightshade
- Solenostemon scutellarioides – Coleus
- Spathoglottis plicata – Philippine Ground Orchid
- Stachytarpheta spp. – Porterweed
- Strelitzia reginae – Bird of Paradise
- Thunbergia grandiflora – Bengal Trumpet
- Tibouchina urvilleana – Princess-flower
Purple and Blue Flowers
Listed here are all of the Hawaiian plants with conspicuous purple, blue, or violet flowers on this site. Note: Some of the plants listed below may not yet have images available in these colors.