φυτοσπόρος
From LSJ
ψυχῆς πείρατα ἰὼν οὐκ ἂν ἐξεύροιο πᾶσαν ἐπιπορευόμενος ὁδόν· οὕτω βαθὺν λόγον ἔχει → one would never discover the limits of soul, should one traverse every road—so deep a measure does it possess
English (LSJ)
(parox.), ον,
A planting: generative, ἀλκή Orph.Fr.274: metaph., begetting, ὁ φ. father, S.Tr.359; φυτοσπόροι, οἱ, ancestors, hence metaph., predecessors, Vett.Val.239.10: c. gen., γένους φ. Ar.Byz.Arg.S.OT