1921] 
PAYSON— MONOGRAPH OF THE GENUS LESQUERELLA 209 
numerous, irregularly coherent, branching; caudex much 
branched; stems erect, 2-14 cm. long, unbranched; terminal bud 
apparently never developing into a fertile stem; radical leaves 
linear to linear-oblanceolate, entire, 1-4 cm. long; cauline leaves 
similar; petals yellow, narrowly spatulate, 5-7 mm. long; fila- 
ments linear, slightly enlarged at the base; fruiting inflorescence 
usually elongated; pedicels sigmoid, 5-10 mm. long; pods erect 
or ascending, sessile, ovate, compressed at the apex, 4-5 mm. 
long, stellate; styles 2-4 mm. long; septum frequently perfor- 
ate, nerved, areolae tortuous or nearly straight; ovules 2-4 in 
each cell, funiculi attached to septum for one-half their lengths 
or more; seeds not winged. 
Distribution: in the mountains of Montana, Wyoming, and 
northern Colorado. 
Specimens examined: 
Montana: without definite locality, Kelsey 92 (Mo. Bot. 
Gard. Herb.); mountains about Helena, June 6, 1887, Anderson 
(Mo. Bot. Gard. Herb.); dry uplands, Helena, May 19, 1905, 
Blankinship 58 (U. S. Nat. Herb. and Mo. Bot. Gard. Herb.); 
Bridger Canyon, June 16, 1901, Jones (Rky. Mt. Herb.); Grey- 
cliff, Sweet Grass County, May 25-31, 1912, Eggleston 7835 (U. 
S. Nat. Herb.); Wreck Creek, Greycliff, Sweet Grass County, 
May 29, 1912, Eggleston 7853 (U. S. Nat. Herb.); Trail Creek, 
Park County, July 2, 1899, Blankinship (Mo. Bot. Gard. Herb.); 
north slope of Baldy Mountain, Absaroka Range, Park County, 
June 25, 1912, Eggleston 8072 (U. S. Nat. Herb.) ; Spanish Basin, 
Gallatin County, June 23, 1897, Rydberg & Bessey 4170 (Geo. 
Osterhout Herb., U. S. Nat. Herb., and Rky. Mt. Herb.); west 
Gallatin River, June 9, 1899, Jones (U. S. Nat. Herb.) ; Sedan, 
Gallatin County, May 14, 1901, Jones (U. S. Nat. Herb.). 
Wyoming: Teton River, June 14, 1854, Doty 166 (Mo. Bot. 
Gard. Herb.); forks of Green River, July 6, 1860, Hayden (Mo. 
Bot. Gard. Herb.); Hillon's, near Colorado line, July 5-10, 
1896, Osterhout 1104 (Geo. Osterhout Herb.). 
Colorado: lat. 39-41°, July, 1864, Parry (U. S. Nat. Herb. 
and Mo. Bot. Gard. Herb.) ; summit of Mt. Bross, Middle Park, 
July 29, 1876, Patterson (U. S. Nat. Herb. and Mo. Bot. Gard. 
Herb.); Sulphur Springs, Grand County, June 9, 1906, Oster- 
hout 3260 (Geo. Osterhout Herb.); Troublesome, Grand County, 
