Bell-shaped flowers, yellow inside but red-purple outside. According to the International Clematis Register and Checklist 2002, this form was collected by David Hummel from Central Asia in 1929.

Group:	Tangutica group
Parentage:	Selection from intricata
Other name(s):	intricata var phaeantha 'David Hummel'
Further detail:  Tepals: 4 Leaves: 2-ternate Database entry: 2220