zahavasdad,
Wild rice is another example of people making things Kitynot that isnt. Wild rice is a GRASS not a rice, the only thing it has in common with rice is the name and it sort of looks like rice, but its a GRASS
All cereal grains (wheat, spelt, maize, etc.) are grasses too. Halachic categories and botanical categories are different things, so trying to shove the square peg of botanical categories into the round hole of kitniyos is an exercise in futility.