1921] 
PAYSON— MONOGRAPH OF THE GENUS LESQUERELLA 155 
1901, Eggert (Mo. Bot. Gard. Herb.) ; dry open ground, Canyon, 
Randall County, July 12, 1917, Palmer 12526 (Mo. Bot. Gard. 
Herb.); plains and prairies, Post City, March 17, 1909, Ruth 5 
(U. S. Nat. Herb.); Glover's Pasture, Grady, Fisher County, 
April 14, 1901, Shepherd (U. S. Nat. Herb.). 
Colorado: Rule Creek, Bent County, May 22, 1913, Osterhout 
4878 (Geo. Osterhout Herb.); bluffs of Arkansas at Pueblo, 
May, 1873, Greene (Mo. Bot. Gard. Herb.); mesas near Pueblo, 
May 14, 1900, Rydberg & Vreeland 6142 (Rky. Mt. Herb.); 
Pueblo, May 23, 1914, Bethel (Rky. Mt. Herb.). 
New Mexico: stony hills, Nara Visa, April 21, 1911, Fisher 
104 (U. S. Nat. Herb.). 
L. ovalifolia, because of its contracted inflorescence, is likely to 
be confused with no other species except L. Engelmannii and to 
this species it is most closely related. "The broader basal leaves, 
whose blades are abruptly narrowed to the petiole, and the 
denser, more silvery pubescence serve to give ovalifolia a differ- 
ent appearance. It is also a lower, more compact plant and 
shows the rosette habit quite definitely established. In L. Engel- 
mannit the terminal bud normally develops a sterile shoot sev- 
eral centimeters in length. The ranges of the two species are 
consistently separated. L. ovalifolia is undoubtedly a distinct 
calciphyte. 
10. L. montevidensis (Eichl.) Wats. Proc. Am. Acad. 23: 251. 
1888. 
Vesicaria montevidensis Eichl. in Mart. Fl. Bras. 13: 302. t. 
67, fig. 2. 1865; Gilg & Muschler in Engl. Bot. Jahrb. 42: 466. 
1909. 
Perennial, silvery stellate-pubescent throughout, stellae many- 
rayed, rays forked at the base, distinet or irregularly coherent; 
caudex woody, branched, somewhat elongated; stems erect or 
decumbent, 3-6 dm. long; terminal bud remaining undeveloped 
or producing only a short sterile shoot; radical leaves oblanceo- 
late, remotely dentate or subentire, 2.5-3.5 cm. broad, petiole 
short; cauline leaves narrowly oblanceolate, remotely dentate 
or subentire, acute; petals yellow, obovate; filaments slightly 
dilated at the base; fruiting inflorescence rather short; pedicels 
straight or simply curved, ascending; pods erect, sessile, ellip- 
