 A. brownii is the only endemic species of Hawaiian Amaranthus in the Hawaiian Islands . It is an herbaceous annual plant that grows to a height of 30 – 90 cm ( 0 @.@ 98 – 2 @.@ 95 ft ) and has narrow , linear leaves , small green flowers , and fruit that holds a single , dark red seed . A. brownii is monoecious ; that is , the male and female flowers are found together on the same plant . It differs from other Hawaiian species of Amaranthus with its spineless leaf axils , linear leaves , and <unk> fruits ( fruit which does not open to release seeds when ripe ) . The fruits are ovoid and between 0 @.@ 8 – 1 mm long and 0 @.@ 6 – 0 @.@ 8 mm wide . The plant is thought to be <unk> ( pollinated by wind ) . 
