Almond - Wikipedia Almond blossom Blossoming of bitter almond tree The seeds of Prunus dulcis var dulcis are predominantly sweet [14][15] but some individual trees produce seeds that are somewhat more bitter [3] The genetic basis for bitterness involves a single gene, the bitter flavour furthermore being recessive, [16][17] both aspects making this trait easier to domesticate The fruits from Prunus dulcis var