PLANTS FROM SOUTHEASTERN UTAH. 291 



32. Mentzelia pumila Torr. & Gray, Fl. N. Am., i, 



535- 



Type locality: "Bare hills on the banks of Ham's 

 Fork of the Colorado of the West, Oregon." 



This was common throughout the region. Flowers 

 opened about 5 p. m. Specimens collected near McElmo 

 Creek and the San Juan River have cream-white flowers 

 3 cm. in diameter, leaves pinnately-lobed with obtuse 

 divisions. A plant collected near the head of Willow 

 Creek has pagoda-shaped leaves and pale yellow flowers 

 15-20 mm. in diameter, with sepals surpassing the petals; 

 seeds similar to those of the other specimens. 



Note. — Cactacece were not common nor were more 

 than four kinds observed. Some species of Opuntia 

 and Echinocactus were seen, but owing to poor condition, 

 being without either flowers or fruit, and because of poor 

 facilities for preserving, they were not collected. 



33. Houstonia saxicola n. sp. 



Stems several from a tap-root, woody, growing in 

 clumps about 4 cm. high; whole plant minutely scabrous; 

 leaves dense, linear -lanceolate, with revolute margins, 

 apiculate, 10—12 mm. long, 1 mm. wide; younger leaves 

 broader and shorter; stipules truncate or acute, membra- 

 nous, uniting the petioles; flowers axillary, lobes of the 

 calyx acuminate, about 1 mm. long; corolla salver form, 

 lilac, tube slender, 10 mm. long, divisions veiny, 4 mm. 

 long, 2 mm. wide; stamens inserted in the throat; style 

 nearly 3 mm. beyond the throat; stigma with two diverg- 

 ing globose lobes; pod didymous, spreading open almost 

 to the base, the two cells of each part prominent, nodding 

 on curved peduncles; seeds dark brown, patelliform, 

 minutely scrobiculate. 



This was collected growing amid the stones on the 



