There is an image of this cultivar on the Hosta Library. From the photo on the HL website, it appears to be a medium size hosta with green foliage. It bears lavender flowers on very tall scapes. This non-registered cultivar was originated by Roger and Ann Bowden of Devon, England . 

According to The Hostapedia by Mark Zilis (2009), 'Devon Tot' = 'Devon Tor'