1921] 
PAYSON—MONOGRAPH OF THE GENUS LESQUERELLA 187 
Specimens examined: 
Arkansas: in the Cherokee country, between the Illinois and 
Neosho rivers, June, 1835, Engelmann 781 (Mo. Bot. Gard. 
Herb.). 
Kansas: vicinity of Oswego, May 11, 1883, Oyster (Mo. Bot. 
Gard. Herb.); Oswego, May 5, 1891, Newton (U. 8. Nat. Herb. 
and Mo. Bot. Gard. Herb.) ; low rocky prairie near Independence, 
April 26, 1902, Kenoyer (U. S. Nat. Herb.). 
Oklahoma: Goodland, May 10, 1892, Trelease (Mo. Bot. 
Gard. Herb.); common, Catoosa, May 8, 1895, Bush 1152 (U. 
S. Nat. Herb. and Mo. Bot. Gard. Herb.); grassy prairie, Mari- 
etta, Love County, April 18, 1913, Stevens 88 (U. S. Nat. Herb. 
and Mo. Bot. Gard. Herb.). 
Texas: sandy soil, Terrell, April 5, 1903, Reverchon 3716 
(U. S. Nat. Herb. and Mo. Bot. Gard. Herb.). 
The only consistent difference between this plant and gracilis 
lies in the pear-shaped rather than spherical pods. All inter- 
mediates between the two are found. In the specimens cited 
those plants having globose or ellipsoid pods have been re- 
ferred to the species and those in which the pods were decidedly 
pyriform have been retained for the variety. L. repanda was 
described from a plant with immature pods, while in the type of 
L. Nutialli the pods were fully developed. The shoulder at 
the base and the broadly pear-shaped apex do not develop until 
the pod is nearly mature. 
26b. Var. sessilis Wats. Proc. Am. Acad. 23: 253. 1888; 
Coulter, Contr. U. S. Nat. Herb. 2: 18. 1891; Wats. in Gray, 
Syn. Fl. N. Am. 1': 120. 1895. 
Lesquerella sessilis Small, Fl. Southeastern U. S. 471. 1903, 
and ed. 2, 471. 1913. 
Vesicaria angustifolia Scheele, Linnaea 21: 584. 1848; Gray, 
Bost. Jour. Nat. Hist. (Pl. Lindh.) 6: 145. 1850; Gray, Smith- 
son. Contr. (Pl. Wright.) 5: 13. 1853. 
V. gracilis Torr. & Gray, Pac. R. R. Rept. 2: 159. 1855. 
Annual; stems branching; radical leaves entire to lyrate; 
cauline leaves linear to oblanceolate, entire or repandly dentate; 
petals yellow; fruiting inflorescence elongated; pedicels ascend- 
