two yellow wild daffodil flowers narcissus pseudonarcissus in full blossom on dark background

2017 against alkaloid amarylis amaryllidaceae april background beauty blossom cancer charities corona daffodil dark decoration during flower flowers full garden isoprenoids isoquinoline league lycorine medicinal monoterpene narcissus perennial petal pistil pseudonarcissus season separ shot spring stem stigma symbol wild yellow