Classification
Kingdom: Plantae (2715)
Phylum: Tracheophyta (2630)
Class: Magnoliopsida (2217)
Order: Campanulales (19)
Family: Campanulaceae (19)(family description)
Genus: Lobelia (4)
Epithet: excelsa Bonpl. (2)
Synonyms: Dortmanna arguta (Lindl.) Kuntze, Dortmanna excelsa (Bonpl.) Kuntze, Lobelia arguta Lindl., Lobelia neriifolia Moris, Lobelia salicifolia Sweet, Rapuntium excelsum (Bonpl.) C.Presl, Tupa arguta (Lindl.) G.Don, Tupa glaucescens Phil., Tupa salicifolia (Sweet) G.Don
excelsa => high, elevated
glaucescens => becoming greyish or bluish
salicifolia => having leaves like Salix (Willow)