Chú thích Psoralea

  1. ↑ Nathaniel Lord Britton, Addison Brown (1913). An Illustrated Flora of the Northern United States, Canada and the British Possessions: From Newfoundland to the Parallel of the Southern Boundary of Virginia, and from the Atlantic Ocean Westward to the 102d Meridian 2. C. Scribner's sons.  page 361
  2. ↑ Charles E. Ressey (1902). Robert W. Furnas, biên tập. “Report of the Botanist: Preliminary account of the plants of Nebraska which are reputed to be poisonous, or are suspected of being so”. Annual Report, Nebraska State Board of Agriculture, for the year 1901 (Nebraska State Board of Agriculture): 95–129.  Đã bỏ qua tham số không rõ |address= (trợ giúp), page 119