Green Flowers Shown here are southeastern Arizona plants with with conspicuous green flowers. Agave palmeri – Palmer's Century Plant Amaranthus fimbriatus – Fringed Amaranth Amaranthus palmeri – Carelessweed Asclepias asperula – Spider Milkweed Asclepias nyctaginifolia – Mojave Milkweed Boerhavia scandens – Climbing Wartclub 1 of 41>Last