poisonous skin

Are Begonias Safe To Eat? Tuberous Begonias (Begonia X tuberosa) – The leaves, flowers, and stems are edible. Begonia blossoms have a citrus-sour taste. … The flowers and stems contain oxalic acid and should not be consumed by individuals suffering from gout, kidney stones, or rheumatism. Are geraniums poisonous to humans? Geraniums are not poisonous