1921 
PAYSON—MONOGRAPH OF THE GENUS LESQUERELLA 227 
Nat. Herb.); banks of the Columbia River near Columbus, 
April 14, June, 1886, Suksdorf 842 (U. S. Nat. Herb. and Mo. 
Bot. Gard. Herb.). 
Oregon: Columbia River near Umatilla, May 1, 1882, Howell 
(U. S. Nat. Herb. and Mo. Bot. Gard. Herb.) ; along Columbia 
River at Heppner Junction, April 16, 1903, Lunell (U. S. Nat. 
Herb.); Biggs, Sherman County, May 31, 1910, Heller 10114 
(U. S. Nat. Herb.). 
L. Douglasii is a definitely limited species marking the farthest 
migration of the genus to the northwest. Its closest relative 
apparently is L. occidentalis. From this species and its relatives 
it is at once separated by the inflated pods that are not at all 
compressed at the margins and by the taller, more nearly erect 
stems. The geographical distribution, so far as available speci- 
mens show, is peculiarly limited to the Valley of the Columbia 
River. 
SPECIES EXCLUDED 
Lesquerella velebitica Degen, Magyar Bot. Lap. 8: 3. 1909 
= Degenia velebitica (Degen) Hayek, Oesterr. Bot. Zeitschr. 
60: 93. 1910. 
This interesting plant from the Balkans is of strikingly sim- 
ilar aspect to certain species of Lesquerella but is certainly not 
to be regarded as having been derived from the same group of 
Cruciferae as they. Its elevation to generic rank seems a satis- 
factory disposition of it. 
Lesquerella thlaspiformis (Phil. Gilg & Muschler in Engl. 
Bot. Jahrb. 42: 466. 1909 = Eudema thlaspiforme Phil. Anal. 
Univ. Chile, 675. 1872. 
'This plant is unknown to the author but from the description 
seems not to be referable to Lesquerella. It is a native of the 
province of Santiago, Chile. 
Lesquerella flecuosa Brandegee, Zoe 5: 233. 1906. 
The relationship of this plant will be treated in a subsequent 
paper. Its affinity is certainly not with Lesquerella. 
List or EXsICCATAE 
In the following index to the specimens cited in this mono- 
graph the collector’s number, if one occurs, is printed in italics 
