quater of lily of the nile, also called african blue lily flower

acanthus african africanus agapanthaceae agapanthoideae agapanthus also amaryllidaceae australia blooming blossom blue botanical botany called exotic flora floral floriculture flower flowering foliage fresh garden gardening head herb herbaceous horticultural horticulture leaf liliaceae lilium lily natural nature nile ornamental outdoor park pastel perennial petal plant pollen purple quater stamen tropical umbel violet white