1921] 
PAYSON—MONOGRAPH OF THE GENUS LESQUERELLA 175 
Macoun, Cat. Canadian Pl. 1: 54. 1883; Coulter, Manual 
Rocky Mountain Region, 25. 1885; Kellerman, Fl. Kan. 24. 
1888. 
Lesquerella ludoviciana (Nutt.) Wats. Proc. Am. Acad. 23: 
252. 1888; Webber, Cat. Fl. Nebr. 119. 1890; Eastwood, Fl. 
Denver, 6. 1893; Wats. in Gray, Syn. Fl. N. Am. 1°: 118. 
1895; Nelson, Wyo. Exp. Sta. Bull. 28: 82. 1896; Rydb. FI. 
Rocky Mountains, 333. 1917. 
Alyssum globosum Kuntze, Rev. Gen. Pl. 2: 931. 1891. 
Stout perennial, densely stellate-pubescent throughout; stel- 
lae rather large, many-rayed, rays forking near the base, fre- 
quently granular; stems erect or decumbent, 2-4 dm. long, 
usually unbranched; terminal bud remaining undeveloped or 
central stem elongating slightly but always sterile; radical leaves 
broadly linear to narrowly oblanceolate, 3-10 cm. long, entire or 
slightly toothed; cauline leaves similar but shorter, numerous; 
petals yellow, very narrow, blade and claw scarcely distinct, 
about 8 mm. long; filaments slightly but gradually dilated at 
the base; fruiting inflorescence elongated; pedicels recurved, 
1-1.5 cm. long; pods usually pendent, sessile or substipitate, 
globose or slightly elongated, 3-4 mm. in diameter, densely 
pubescent with more or less spreading stellae; styles slender, 
equalling or exceeding the pods; septum thin, distinctly nerved, 
areolae straight or somewhat tortuous; ovules 4-6 in each cell, 
funiculi attached to septum for about one-half their lengths. 
Distribution: Illinois, Minnesota, North and South Dakota, 
Montana, southern Wyoming, Colorado, eastern Utah, and 
northern Arizona. 
Specimens examined: 
Illinois: on sand dunes, Havana, Aug. 22, 1904, Gleason 
(Deam Herb.). 
North Dakota: sandy soil on hillside, Cannon Ball, June 28, 
1912, Bergman 1875 (Mo. Bot. Gard. Herb.); Mandan, 1915, 
Sarvis 6 (U. S. Nat. Herb.). 
South Dakota: common at Fort Pierre, June 19, 1853, Hay- 
den (Mo. Bot. Gard. Herb.); Eaglenest Butte, on White River, 
May 14, 1855, Hayden (Mo. Bot. Gard. Herb.); bed of Chey- 
enne River, July 3, 1859, Hayden 88 (Mo. Bot. Gard. Herb.); 
