Porteranthus stipulatus (Muhl. ex Willd.) Britt., Rosaceae: See Gillenia stipulata (Muhl ex Willd.) Nutt.
I have no articles for this botanical term, but there might be some for the next level down (if found).
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.
Plant Healer Magazine: Very relevant to the practitioner.
http://www.henriettes-herb.com - Copyright 1995–2015 Henriette Kress.