Pyrena
From Infogalactic: the planetary knowledge core
<templatestyles src="Module:Hatnote/styles.css"></templatestyles>
<templatestyles src="Module:Hatnote/styles.css"></templatestyles>
Pyrena or pyrene is the name for the stone within a drupe or drupelet. It consists of a seed surrounded by hard endocarp tissue.[1][2]
References
<templatestyles src="Asbox/styles.css"></templatestyles>