You choose a category first, like "tree", "flower", "grass" or "fern" and it will guide you through the process, trying to identify the plant with as few photos as necessary. Common ones it will identify from a single image, for others, it will e.g. prompt to take a close-up photo of the bark, bloom or the complete plant in its environment. From what I understand, they are aiming for accuracy of the identification and will provide a description of possibly matching plants if there is still ambiguity. Very recommended!
Edit: here is a link if it sounds interesting: https://floraincognita.com