A ^ ades NN. Ug ac ERST LP Tu 
EERE ROS reg? NT d Y 
1921] 
PAYSON—MONOGRAPH OF THE GENUS LESQUERELLA 169 
long; pods erect, substipitate, glabrous, subglobose or oblong, 
3-4 mm. in diameter; styles 2-3 mm. long; septum nerved, 
areolae rectangular, boundaries frequently tortuous; ovules 
6-8 in each cell, funiculi attached to septum for about one-half 
their lengths; seeds small, marginless. 
Distribution: in the mountains of north central Mexico. 
Specimens examined: 
Mexico: 
Coahuila and Nuevo Leon: without definite locality, Feb.— 
Oct., 1880, Palmer 29 (U. S. Nat. Herb.). 
Coahuila: Sierra de Parras, March to April, 1905, Purpus 
1148 (Baker Herb. at Pomona College, and Mo. Bot. Gard. 
Herb.). 
San Luis Potosi: chiefly in the region of San Luis Potosi, 
1878, Parry & Palmer 26 (U. 8. Nat. Herb. and Mo. Bot. Gard. 
.Herb.); chiefly in the region of San Luis Potosi, 1878, Parry & 
Palmer 25% (U. S. Nat. Herb. and Mo. Bot. Gard. Herb.); 
San Luis Potosi, 1879, Schaffner 555 (U. S. Nat. Herb.); Minas 
de San Rafael, June, 1911, Purpus 5232 (U. S. Nat. Herb. and 
Mo. Bot. Gard. Herb.). 
This characteristic Mexican species is probably related most 
closely to L. argyraea and may be distinguished from all other 
members of the genus by the scale-like stellae in which the rays 
are attached nearly or quite to their apices. 
17. L. pueblensis Payson.! 
Perennial, caudex usually branching and often elongated and 
woody; stellae numerous, giving the entire plant a silvery ap- 
pearance, rays unbranched, united for about one-half their 
lengths, somewhat granular; stems mostly erect, 1-3.5 dm. 
long, slender, frequently branched; terminal bud apparently 
usually developing only a short sterile shoot; radical leaves un- 
known; eauline leaves narrowly oblanceolate, obtuse or acute, 
entire or repandly dentate, 2-4 cm. long; flowers small, incon- 
spieuous; petals apparently at first yellow, fading purplish, 
—— "pue; ge 6 mm. ong; see piss pues of 
LL 4- f. 42 
