The text search is searching through the names (Cultivars, commons, and latins). The only common name for this plant is "Iris" and the word "siberian" is nowhere is any of the names.
The way to get this resolved is to add "Siberian Iris" as a common name. Then it will show up in searches. But that begs the question: is "Siberian Iris" a suitable secondary common name for this?
