Elfroot?

Blackwall to Solas: "Do the elves just call it root."
Solas to Blackwall: "No, we have another name for it."

Annoyingly he never said what it is called in elvish. I'm with Blackwall that at the very least he could have joked they called it "Shemroot". Presumably since it is associated with healing, the elves would call it something related to that.

My feelings for elfroot are classified.

As are mine but never the less we can never habv etoo much of it.

knife ear root

TBH I think Solas enjoys trollin geverybody. Remember he is the dread wolf tricking people is his specialty.

I have glaucoma.

Canavaris isn't Latin. It is possible they made up the word to sound like Latin but it is odd because most of their use of Latin sounding words to equate with ancient or modern Tevene does tend to have a recognisable equivalent in actual Latin. So it is entirely possible that Canavaris is the elven word for it.  In which case the "avaris" would be the "root" part (see below)

DAO explains the reason the common name is elf root is that those Dalish that trade with humans tend to do good business in selling the herb as ordinary peasants are probably wary of going into the wilds to collect it. So the Dalish probably call it "money spinner"

Strangely enough, in the Dalish nursery rhyme that they are said to be taught to help them pick plants safely, it is simply called the common name of Elf root, as are Deathroot and Blightcap, the only plant that is given a specific elvish name is Felandaris. However, the description says it has heart shaped leaves, in which case I would have thought the elven name would be heart root or heart weed, so vhenanalas (earth heart) would fit.

I am not really sure how the Project elven came up with Felandara. Why does felan = plant? With Vhenadahl, if the Vhen part equates to People, the adahl = tree and thus plants would have a name that was similar. Earth is said to be Alas. So in that case if Felandaris = demon weed, then andaris would more likely be the word for weed/plant.

With Felassan, if assan = arrow then Fel = slow. Felandaris is used as a poison, slowing down the victim and leaching life from them, so I think it is highly unlikely that the elves would give it a similar name to beneficial plants. It is odd the Project should think Daris = demonic. The elven word for spirit or demon is Elgar.

So I think that it gets its common name "demon weed" from its appearance that the nursery rhyme says looks like demon horns and the fact it grows where the Veil is thin, but its name actually translates as "Slow (killing) weed".

When I start new DAI playthrough, and enter the open world, I scream "LET THE ELFROOT GAMES BEGIN!!1" while collecting them furiously ... (at least inside my head)