This seedling of H. 'Tokudama' comes from England and was registered by Richard Kitchingman in 1986. The low mound grows to about 10 inches in height with a spread of 23 inches. Its leaves have wavy margins, slight corrugations and are heart shaped. Lavender flowers bloom in July.

According to The Hostapedia by Mark Zilis (2009), "Tump" refers to a mound or hummock. Its registered parentage is questionable as it shows many characteristics of H. nakaiana and little relationship to H. 'Tokudama' other than the blue-green leaf color." 

According to a Google search, a "tump" is a small clump of trees or a rounded mass.

An article about H. 'Pelham Blue Tump' by Warren I. Pollock in The Hosta Journal (1995 Vol. 26 No. 2) states that, "Pelham is the name of Dick Kitchingman's home in Dorset, England. Tump is an old English word for a small mound...a small plant with blue-green leaves. It's a 'Tokudama' hybrid."