Persistent nucellus in the seed is known as

Perisperm is persistent nucellus present in the seed, as seen in beetroot and black pepper.
(1) Tegmen is the inner seed coat obtained from inner integument of ovule.
(2) Chalaza is the basal region of ovule body present below the embryo sac. 
(4) Hilum is the junction between funiculus and ovule.