Expectorant bottle

[orleansdigger]

I haven't posted in awhile but did a little digging outback after a long break and came across a few bottles. I dug this bottle embossed with COLTSFOOTE EXPECTORANT trade mark. I found a Slocum's Expectorant bottle but all info I found spell Coltsfoot without a E. Can someone give me a little more info on age and use. thanks Rodney

 

[orleansdigger]

Side

 

[GuntherHess]

they spelled it both ways ...
http://texashistory.unt.edu/ark:/67531/metapth30263/m1/1/