Interestingly, the word pua was used for zingiberaceae on Easter Island:

Pua, pu'a

Pua. 1. A zingiberacea (plant of which few specimens are left on the island). 2. Flower: pua ti, ti flower, pua taro, taro flower, pua maúku pasture flower; pua nakonako, a plant which grows on steep slopes and produce red, edible berries. 3. Pua tariga (or perhaps pu'a tariga), anciently, hoops put in earlobes. 4. The nanue fish when young and tender. Puapua, summit, top, upper part; te puapua o te maúga, the top of the mountain; te puapua kupega, the upper part of a fishing net. Vanaga.

Pu'a. 1. (Modern form of pu'o), to cover up something or oneself, to put on; ka-pu'a te ha'u, put on your hat; ka-pu'a-mai te nua, cover me up with a blanket. 2. To respond to the song of the first group of singers; to sing the antistrophe; he-pu'a te tai. 3. To help; ka-pu'a toou rima ki a Timo ite aga, help Timothy with the work. 4. Pu'a-hare, to help a relative in war or in any need; ka-oho, ka-pu'a-hare korua, ko ga kope, go, give your relative a hand, lads. 5. To speak out in someone's favour; e pu'a-mai toou re'o kia au, speak in my favour, intercede for me. Pu'apu'a, to hit, to beat. Vanaga.

1. Flower, ginger, soap; pua mouku, grass. 2. To grease, to coat with tar, to pitch; pua ei meamea, to make yellow. Puapua, a piece of cloth. Mgv.: pua, a flower, turmeric, starchy matter of the turmeric and hence soap. Mq.: pua, a flower, soap. Ta.: pua, id. Ma.: puapua, cloth wrapped about the arm. Churchill.

'Red Torch' (Etlingera elatior), an example of zingiberaceae according to Wikipedia.