[There is also the “water Hyacinth” which is a weed that grows in seas and rivers. the flower itself is generally light pink, purple or white. However, all the flowers have blue in the middle. Someone once told me that perhaps this is pshat in the yerushalmi that says ???? ??????. Keyadua, all old Kisvei yad don’t have much of a space in between words so maybe the yerushalmi actually said ???? ???? ?? referring to the water hyacinth that is the grass of the sea.
It is very mechudashdik and doesn’t answer the domeh lwilan in the medrash.]
I saw other attempts to explain the yerushalmi but they are all dochkim.
Speaking of “hyacinth” it is good to quote Codex Justinian (in levush haaron pg. 32)
“No private person shall have power to dye or sell purpurae goods,
Shtait Duh hycinthina (techeiles) comes from murex
Lmaaseh why don’t you wear techeiles??