Click http://en.wikipedia.org/wiki/Lobelia for more information.

I'm confused over some varieties of lobelia that appear to be salvia, veronica or lysimachia.

Perhaps some knowledgeable viewers can clarify the differences by comparing these photos to those in the salvia gallery at https://pbase.com/hjsteed/salvia . Also see https://pbase.com/hjsteed/veronica_filiformis and lysimachia at https://pbase.com/hjsteed/lysimachia .

Caracalla M. A.Hassani writes: "The family of Lobelia is Campanulaceae, a genus of annuals , perennials deciduous or evergreen shrub. Check these out: L.cardinalis; L.cherry ripe; L.dark crusader; L.erinus; L.fulgens; Lsyphilitica; L.tupa; L.verdrariensis. Few of the post popular are cherry ripe, queen victoria and erinus . Google photo of each to have a closer look."