Pursh did not assign an infraspecific epithet to the lectotype and the specimen fully conforms to his brief description. On the basis of the unpublished varietal epithet on the duplicate of the lectotype (as "alba"), it would seem that Lewis 43 likely has whitish flowers. A second collection (as "rosea," PH-LC 66-collected 29 Aug 1806 according to Meehan, 1898: 18) apparently is the more commonly encountered reddish-flowered expression. Pursh says the species has both "pale purple and white" flowers. Meehan lists the specimens under Cleome integrifolia (Nutt.) Torr. & A. Gray (Fl. N. Amer. 1: 122. 1838), a later name for C. serrulata then in common use based on Peritoma integrifolia Nutt. (in J. Acad. Nat. Sci. Philadelphia 7: 14. 1834). We favor the Academy's sheet (PH-LC 65) over the Lambert sheet (PH-LC 67) as there are flowers on this sheet although the leaves are poorly preserved. The leaves are much better represented on PH-LC 67, but the specimen is otherwise sterile. The supposedly red-flowered specimen (PH-LC 66) is also sterile and consists only of a single leaf. There is no evidence Pursh had flowering material in London. The lectotype was collected on 25 Aug 1804 along the Missouri River near Vermillion, in Clay Co., South Dakota (Moulton, 1987a: 468). The paratype was collected on 29 Sep 1804 when the expedition was near the White River in Lyman or Brule Co., South Dakota (Moulton, 1987a: 125-128). Of considerable historical interest is the receipt pasted onto PH-LC 66 for the service of Toussaint Charbonneau, the French fur-trapper and husband of the even more famous Sacagawea (Moulton, 1987a: 228-229; and see Moulton 49b). (The Lewis & Clark Herbarium Digital Imagery Study Set, ANSP, 2002) On deposit at the Academy of Natural Sciences, Philadelphia Collected by:Meriwether Lewis & William Clark Collection date:08/25/1804

Pursh did not assign an infraspecific epithet to the lectotype and the specimen fully conforms to his brief description. On the basis of the unpublished varietal epithet on the duplicate of the lectotype (as "alba"), it would seem that Lewis 43 likely has whitish flowers. A second collection (as "rosea," PH-LC 66-collected 29 Aug 1806 according to Meehan, 1898: 18) apparently is the more commonly encountered reddish-flowered expression. Pursh says the species has both "pale purple and white" flowers. Meehan lists the specimens under Cleome integrifolia (Nutt.) Torr. & A. Gray (Fl. N. Amer. 1: 122. 1838), a later name for C. serrulata then in common use based on Peritoma integrifolia Nutt. (in J. Acad. Nat. Sci. Philadelphia 7: 14. 1834). We favor the Academy's sheet (PH-LC 65) over the Lambert sheet (PH-LC 67) as there are flowers on this sheet although the leaves are poorly preserved. The leaves are much better represented on PH-LC 67, but the specimen is otherwise sterile. The supposedly red-flowered specimen (PH-LC 66) is also sterile and consists only of a single leaf. There is no evidence Pursh had flowering material in London. The lectotype was collected on 25 Aug 1804 along the Missouri River near Vermillion, in Clay Co., South Dakota (Moulton, 1987a: 468). The paratype was collected on 29 Sep 1804 when the expedition was near the White River in Lyman or Brule Co., South Dakota (Moulton, 1987a: 125-128). Of considerable historical interest is the receipt pasted onto PH-LC 66 for the service of Toussaint Charbonneau, the French fur-trapper and husband of the even more famous Sacagawea (Moulton, 1987a: 228-229; and see Moulton 49b). (The Lewis & Clark Herbarium Digital Imagery Study Set, ANSP, 2002) On deposit at the Academy of Natural Sciences, Philadelphia Collected by:Meriwether Lewis & William Clark Collection date:08/25/1804