1921] 
PAYSON—MONOGRAPH OF THE GENUS LESQUERELLA 153 
Dallas, May 3, 1900, Eggert (Mo. Bot. Gard. Herb.); Hood 
County, June, 1882, Reverchon (U. S. Nat. Herb.); rocky hill, 
Austin, May 20, 1872, Hall 21 (U. S. Nat. Herb. and Mo. Bot. 
Gard. Herb.); Mt. Bonnell, near Austin, April 25, 1914, Young 
(Mo. Bot. Gard. Herb.); pebbly shore of the Guadalupe River, 
near New Braunfels, May, 1846, Lindheimer 325 (Mo. Bot. 
Gard. Herb.); pebbly river banks, New Braunfels, May, 1848, 
Lindheimer 576 (Mo. Bot. Gard. Herb.); New Braunfels, May, 
1850, Lindheimer 421 (Mo. Bot. Gard. Herb.); New Braunfels, 
May, 1850, Lindheimer 667 (U. S. Nat. Herb. and Mo. Bot. 
Gard. Herb.); New Braunfels, April, 1851, Lindheimer 526 
(Mo. Bot. Gard. Herb.); New Braunfels, April, 1851, Lindheimer 
666 (U. S. Nat. Herb. and Mo. Bot. Gard. Herb.). 
This species and its northern relative, L. ovalifolia, are peculiar 
among the glabrous podded species in having typically a sub- 
umbellate inflorescence. Occasionally forms of L. Engelmannü 
occur, however, that have the usual elongated raceme of the 
genus. To this variation Gray gave the name var. Q. elatior. 
The type of V. pulchella probably also exhibits this character. 
Since, however, plants with an elongated flower cluster do not 
seem to be limited to any range, this variation has not been 
deemed worthy of taxonomic recognition. 
L. Engelmannii is probably the most conspicuous member of 
the genus when in blossom, due in part to the large size of the 
flowers and in part to the manner in which they are clustered 
at the apices of the erect stems. The distribution of this species 
is evidently limited to calciferous soils. 
9. L. ovalifolia Rydb. in Britton & Brown, Ill. Fl. 2:137. 1897, 
and ed. 2, 2: 156. 1913; Rydb. Fl. Colo. 155. 1906; Petersen, 
Fl. Nebraska, 62. 1912; Wooton & Standley, Contr. U. S. Nat. 
Herb. 19: 276. 1915, in part; Rydb. Fl. Rocky Mountains, 
333. 1917. 
L. ovata Greene, Pittonia 4: 308. 1901. 
L. Engelmannii Nelson in Coulter & Nelson, Manual Cent. 
Rocky Mountains, 219. 1909. 
Perennial, densely silvery stellate, stellae many-rayed, rays 
simple or branching, crowded, granular roughened; caudex 
frequently much branched; stems erect or decumbent, .5-2 dm. 
