Pl@ntNet is a human network based on an IT infrastructure (www.plantnet-project.org), enabling identification, aggregation and sharing of botanical observations at a massive scale. This project involves various research institutions in the fields of computer science, agronomy and ecology, and one of the widest network of naturalists in the world (the Tela Botanica NGO, www.tela-botanica.org). Tens of thousands of plant observations on the European territory have been collected during the past 18 months through web and mobile applications (https://itunes.apple.com/fr/app/plantnet/id600547573?mt=8 & https://play.google.com/store/apps/details?id=org.plantnet). These apps integrate an image-content-based identification system, allowing users to share observations with different levels of information directly from the field. These botanical records are then collaboratively revised through two web applications, the first one being dedicated to the taxonomical validation, while the second one is more related to the estimation of the image quality (in terms of usefulness for helping botanists to identify a species). Revised and validated observations are then mobilized every night in order to enrich the database and thus to improve progressively the image-content-based plant identification system. This new software infrastructure has been viewed over the past 18 months by nearly 270,000 people worldwide, indicating great interest from the botanical community. We propose to present this infrastructure in order to open a discussion on the current changes that new information technologies can make in botany through a citizen science approach.