Austrobaileya References Austrobaileya plant genus Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: magnoliid clade/ Vegetative structures…function as companion cells is Austrobaileya (Austrobaileyaceae; Austrobaileyales). Austrobaileya seems to retain a stage in the evolution of phloem in angiosperms, for a few companion cells have recently been found in its phloem as well. Read More…function as companion cells is Austrobaileya (Austrobaileyaceae; Austrobaileyales). Austrobaileya seems to retain a stage in the evolution of phloem in angiosperms, for a few companion cells have recently been found in its phloem as well. Read More