stemma
noun
stem·ma ˈste-mə 
plural stemmata ˈste-mə-tə
1
: a simple eye present in some insects
2
: a scroll (as among the ancient Romans) containing a genealogical list
3
: a tree showing the relationships of the manuscripts of a literary work
stemmatic
ste-ˈma-tik
adjective stə-
Example Sentences
Recent Examples on the Web Her discipline of philology, the study of the development of texts over time, requires comparing manuscripts to each other, building a stemma, or genealogy of texts, from a parent or original manuscript. 
David M. Perry, Smithsonian Magazine, 25 Mar. 2021
David M. Perry, Smithsonian Magazine, 25 Mar. 2021 Word History
Etymology
Latin, wreath, pedigree (from the wreaths placed on ancestral images), from Greek, wreath, from stephein to crown, enwreathe
First Known Use
1826, in the meaning defined at sense 1