The domesticated types are "Triticum turgidum" subsp. It is believed to have evolved in isolation from the more common "Triticum turgidum". "dicoccum" and "Triticum turgidum "conv." durum". The wild plant is called "Triticum turgidum" subsp. "dicoccoides". For example, triticale is the hybrid of wheat ("Triticum turgidum") and rye ("Secale cereale"). "Triticum dicoccum" (hulled wheat), "Triticum turgidum" (durum wheat).