1921] 
PAYSON—MONOGRAPH OF THE GENUS LESQUERELLA 211 
Wyoming: railroad right-of-way, Moorcroft, Aug. 2, 1901, 
Nelson 8553 (Rky. Mt. Herb.); Gillette, June 9, 1897, Rydberg 
& Bessey 4169 (U. S. Nat. Herb.); rolling plains between Sheri- 
dan and Buffalo, June 15-July 15, 1900, Tweedy 3587 (Rky. Mt. 
Herb.). 
Nebraska: Belmont, July 18, 1889, Webber (Mo. Bot. Gard. 
Herb.). 
Numerous intermediates between typical spathulata and al- 
pina make specific separation of the two seem impossible. The 
only consistent difference between them lies in the leaf outline, 
a character scarcely deserving more than varietal recognition 
were there fewer intermediates or a greater separation of ranges. 
L. alpina and its variety are separated from L. arizonica and 
L. intermedia by the distinctly sigmoid rather than nearly 
straight pedicels, by the fewer ovules, and by the more slender 
habit of growth. The elongated fruiting inflorescence is the 
most striking difference between these forms and L. condensata 
with its variety laevis. 
41. L. condensata A. Nelson, Bull. Torr. Bot. Club 26: 238. 
1899; Nelson in Coulter & Nelson, E 
Manual Cent. Rocky Mountains, 219. Ny Ae 
1909; Nelson, Spring Fl. Intermoun- 
tain States, 64. 1912; Rydb. FI. 
Rocky Mountains, 332. 1917. 
Densely cespitose perennial, pu- 
bescence rather loosely stellate, rays 
rather long, branched, distinct, not 
closely appressed to the plant surface; 
caudex much branched; stems erect, » 
1-3 em. long, unbranched; terminal ( 
bud apparently always remaining 
undeveloped; radical leaves linear to 
linear-oblanceolate, entire, .5-2.5 cm. 
long: cauline leaves few, similar; petals yellow, linear-spatulate, 
5-7 mm. long; filaments linear, slightly broader at the base; 
fruiting inflorescence short, rarely exceeding the leaves; pedicels 
usually sigmoid, 3-7 mm. long; septum perforate or entire, 
£e 
a ZY BS 
elc WV, s A9 
ANR 
Bs | eS 
NS SSS 
EOS 
INNS: 
Fig. 26. L.condensata. Habit 
sketch x 24. Trichomes x 25. 
