FLOWERING PLANTS AND FERNS OF ARIZONA 733 



27. Calyx scarious in fruit, about twice as long as the capsule, 

 the lobes conspicuously spatulate and narrowed at base; 

 stem leaves long-petioled, with broadly ovate to nearly 

 orbicular lobes; pedicels filiform, in fruit often longer than 

 the calyx and decurved; corolla lilac or whitish. 



27. P. PEDICELLATA. 



27. Calyx not becoming scarious, little if at all longer than the 



capsule, the lobes not conspicuously spatulate or narrowed 



at base; pedicels shorter than the calyx, straight; corolla 



normally violet purple (28) . 



28. Stamens included; stem leaves often long-petioled and with 



broadly ovate or oblong-ovate blades, these shallowly 



cleft with broad rounded lobes, but the blades sometimes 



narrower and pinnatifid 28. P. coerulea. 



28. Stamens exserted; stem leaves usually short-petioled or 

 subsessile (29). 

 29. Leaf blades oblong, coarsely crenate or cleft not more 

 than halfway to the midrib, seldom deeper. 



29. P. CORRUGATA. 



29. Leaf blades oblong or ovate-oblong, mostly pinnatisect 

 or deeply pinnatifid, with acute or acutish, usually 

 crenate, leaflets or lobes 30. P. crenulata. 



1. Phacelia pachyphylla A. Gray, Amer. Acad. Arts and Sci. Proc. 



19: 88. 1883. 



Western Maricopa, western Pima, and Yuma Counties, 1,000 feet 

 or lower, dry stony soils commonly of volcanic origin, March. South- 

 western Arizona, southeastern California, and Baja California. 



Corolla pale pink, fading blue. 



2. Phacelia filiformis Brand, Beitr. Kenntn. Hydroph. 8. 1911. 

 Kaibab Plateau and Grand Canyon (Coconino County), about 



7,000 feet, rare, June to September, type from the Grand Canyon 

 (MacDougal 186). Known only from northern Arizona. 



3. Phacelia glechomaefolia A. Gray, Syn. Fl. ed. 2, 2 *: 417. 1886. 

 Peach Springs to the Grand Canyon (Gray in 1885, the type collec- 

 tion), Grand Canyon, Coconino County (Lemmon in 1884, MacDougal 

 198), 4,000 feet, May and June. Southern Utah and northern 

 Arizona. 



4. Phacelia lemmoni A. Gray, Syn. Fl. ed. 2, 2 l : 417. 1886. 

 Grand Canyon, Coconino County (Thornber 8471), Mineral Park, 



12 miles northwest of Kingman, Mohave County (Lemmon 3350, the 

 type collection). Northern Arizona, Nevada, and southern Cali- 

 fornia. 



5. Phacelia pulchella A. Grav, Amer. Acad. Arts and Sci. Proc. 10: 



326. 1875. 

 Mohave County, in Iceberg Canyon, 15 miles above Pierce Ferry, 

 1,700 feet (Jones 5077aj), and near Wolf Hole, about 5,000 feet 

 (Peebles and Parker 14733, 14761), April to May. Southern Utah, 

 Nevada, and northwestern Arizona. 



6. Phacelia rotundifolia Torr. ex S. Wats, in King, Geol. Expl. 40th 



Par. 5: 253. 1871. 

 Mohave and northern Yuma Counties, 2,000 to 5,000 feet, infre- 

 quent on rocky talus slopes, March to May. Southern Utah, western 

 Arizona, and southeastern California. 



