1921] 
PAYSON—MONOGRAPH OF THE GENUS LESQUERELLA 163 
slopes, Bisbee, Mule Mountains, April, 1909, Goodding 61 (Rky. 
Mt. Herb.); gravelly hills, San Francisco Mountains, March 21, 
1881, Rusby 15 (Mo. Bot. Gard. Herb. and U. S. Nat. Herb.); 
Lowell, May, 1884, Parish (U. S. Nat. Herb.); Sanoita Valley, 
April, 1880, Lemmon (U. S. Nat. Herb.); Sabina Canyon, March 
20, 1897, Zuck (U. S. Nat. Herb.); Santa Catalina Mountains, 
May 14, 1883, Pringle (U. S. Nat. Herb.); Santa Rita Forest 
Reserve, March 31-April 23, 1903, Griffiths 4146 (U. S. Nat. 
Herb.); Willow Spring Mountains, March 13-April 23, 1903, 
Griffiths 3646 (U. S. Nat. Herb.); shaded places, Sierra Tucson, 
April 29, 1884, Pringle (U. S. Nat. Herb. and Mo. Bot. Gard. 
Herb.); Agua Verde Creek, April 23, 1914, Harris C. 1485 (U. 
S. Nat. Herb.); canyons near Camp Grant, April 2, 1867, Palmer 
(Mo. Bot. Gard. Herb.). 
Mexico: 
Chihuahua: shaded ledges, hills near Chihuahua, Oct. 24, 
1886, Pringle 949 (U. S. Nat. Herb.); vicinity of Chihuahua, 
April 8-27, 1908, Palmer (Mo. Bot. Gard. Herb. and U. S. Nat. 
Herb.); Santa Eulalia Hills, July 30, 1885, Wilkinson (U. S. 
Nat. Herb.); Santa Eulalia Mountains, April 4, 1908, Rose 
11692 (U. S. Nat. Herb.); vicinity of Cusihuiriachic, April 2 
and 3, 1908, Rose 11652 (U. S. Nat. Herb.). 
L. purpurea is one of the most distinctive species of the genus 
and is likely to be confused with no other species. Its distin- 
guishing characteristics are the perennial root with the rosette 
of broad, silvery leaves, the white or purplish flowers, and the 
glabrous pods on pedicels that are normally recurved in age. 
It apparently flowers frequently in the late summer or fall. 
15. L. Fendleri (Gray) Wats. Proc. Am. Acad. 23: 254. 1888; 
Coulter, Contr. U. S. Nat. Herb. 2: 18. 1891; Wats. in Gray, 
Syn. Fl. N. Am. 1': 120. 1895; Nelson in Coulter & Nelson, 
Manual Cent. Rocky Mountains, 219. 1909; Clements & Clem- 
ents, Rocky Mountain Flowers, 25. 1914; Wooton & Standley, 
Contr. U. S. Nat. Herb. 19: 276. 1915. 
Vesicaria Fendleri Gray, Mem. Am. Acad. N. S. (Pl. Fendl.) 
4: 9. 1849; Gray, Bost. Jour. Nat. Hist. (Pl. Lindh.) 6: 149. 
1850; Walp. Ann. 2: 39. 1851; Torr. & Gray, Pac. Rail. Rept. 
2: 160. 1855; Torr. Pac. Rail. Rept. 5: 66. 1856; Coulter, 
