It looks like Spanish lavender. Lavendeer stoechas. The flower has the tell tale rabbit ears at the top. It is one of the more adaptible lavenders for warmer climates. Although I like and have had this lavender before it does not have a long bloom season. It is not an augustifolia so it is more for fragrance and drying than for cooking. I usually grow lavender multifeda, it is definitely more musty and ornamental and in Hawaii it will bloom almost the entire year.
In warm climates zones 9-11, Spanish lavender, l. multifeda and the lavindins do better. Lavender augustifolia will do well only in the high elevations like in Kula on Maui where there is a lavendar farm. I have Provence, Goodwin Creek, French Lavender, Otto Quast, and multifeda now.
Happy gardening in Hawaii. Gardens are where people grow.