Life … Plants Vascular Plants Dicots Sunflowers, Bellflowers, Fanflowers, and Allies Sunflower Family Silverswords 'Āhinahina Haleakala Silversword subspecies Haleakala Silversword Argyroxiphium sandwicense macrocephalum Field notes Key traits Layer Shrubs Plant type Perennial Shrub From USDA PLANTS. Close