pa·le·o·bot·a·ny 
(pā′lē-ō-bŏtn-ē)
(pā′lē-ō-bŏtn-ē)n.
The branch of paleontology that deals with plant fossils and ancient vegetation.
pa′le·o·bo·tanic (-bə-tănĭk), pa′le·o·bo·tani·cal (-ĭ-kəl) adj.
pa′le·o·bo·tani·cal·ly adv.
pa′le·o·bota·nist n.