152 Flora of the Providence Mountains. [ZOE 
Pentstemon calcareus. Woody at base, czespitose; stems 
5-10 cm. high, finely pubescent; basal leaves, thick in tex- 
ture, 2-4 cm. long, 15 mm. wide, variable in shape, ovate to 
elliptical, cuneate into a winged petiole, rarely with a few den- 
ticulations, stem leaves 2-3 cm. long, linear lanceolate, upper 
ones sessile; inflorescence of 8—ro flowers crowded at end of the 
stem, in fruit the thyrsus becoming 3-4 cm. long; corolla pink, 12 
mm. long, tubular funnel form, lobes short and nearly equal; 
sterile filament densely yellow-bearded upon one side; sepals 4 
mm. long, lanceolate, pubescent, somewhat viscid, longer than 
the acuminate capsule. 
In appearance resembling P. Harbouriz, to which it is nearly 
related. It grows upon the face of perpendicular limestone cliffs 
of Providence Mt. Dr. Purpus collected insufficient specimens 
of what appears to be the same plant in Southern Utah. 
Mimulus luteus YL. 
Castilleia angustifolia Nutt. 
Monardella linoides Gray. 
Audibertia incana Benth. 
Audibertia capitata Gray. 
Salazaria Mexicana Torr. 
Fledeoma thymoides Gray. 
Verbena ciliata Benth. 
Lippia Wrightit Gray. 
Mirabilis multiflora Gray. 
Mirabilis aspera Greene. ‘This species has been distributed by 
Mr. Parish as MZ. Californica deserti. It seems more distinct in 
the Providence Mts. than on the mountains bordering the Colo- 
rado Desert, where the flowers are often quite purple. 
Oxybaphus nyctagineus Sweet? Plants 4 inches high, densely 
glandular-pubescent, leaves hastate. Nearly glabrous specimens 
were also collected. Purpus, No. 5905, from Nevada, represents 
a still more glabrous form. 
Pterostegia drymarioides F. & M. 
Chorizanthe Watsoni T. & G. 
Erwgonum nidularium Coville. 
Evriogonum Watsoni 'T. & G. 
