FLOWERING PLANTS AND FERNS OF ARIZONA 313 



2. Plants perennial; petals commonly deeply cleft (4). 



4. Petals cardinal red, greatly surpassing the calyx, laciniate with several 

 divisions, rarely merely bifid; leaves oblong-lanceolate, oblanceolate, 



or obovate 4. S. laciniata. 



4. Petals white, pink, or purplish, moderately or only slightly surpassing 

 the calyx, bifid (5). 

 5. Inflorescence subracemose or narrowly thyrsoid, elongate (6). 



6. Leaves lanceolate or oblanceolate, acute or short-acuminate; calyx at 

 anthesis turbinate-campanulate; petals cream -colored or pale 

 pink; capsules ovoid 5. S. hallii. 



6. Leaves linear, narrowly lanceolate, or the lowest oblanceolate, long- 



acuminate; calyx at anthesis cylindric; petals dull purplish pink; 



capsules ovoid-oblong 6. S. pringlei. 



5. Inflorescence loose and open, cymose or cymose-paniculate, or the 

 flowers solitary in the upper leaf axils (7) . 



7. Stems copiously glandular-pilose above, commonly more than 30 



cm. long; inflorescence elongate, cymose-paniculate; calyx 

 at anthesis cylindric; flowers about 12 mm. long; leaf blades 

 narrowly to broadly lanceolate or the lowest oblanceolate, attenu- 

 ate-acuminate at apex, abruptly contracted at base, sessile. 



7. S. THURBERI. 

 7. Stems puberulent and only slightly glandular, commonly less than 



30 cm. long; inflorescence short and spreading, cymose, some of 

 the flowers often solitary; calyx at anthesis obconic; flowers not 

 more than 10 mm. long (8). 

 8. Cauline leaves seldom less than 8 mm. wide, ovate, oblong-lanceo- 

 late, or broadly oblanceolate, attenuate at base, sometimes 

 short-petioled; flowers mostly subtended by large foliage 

 leaves; calyx at anthesis campanulate-obconic. 



8. S. MEXZIESII. 



8. Cauline leaves not more than 4 mm. wide, linear-lanceolate or 

 narrowly oblanceolate, scarcely narrowed at base, sessile; 

 flowers in very open terminal cymes, these with the leaves 

 greatly reduced and bractlike; calyx at anthesis cylindric- 

 obconic 9. S. rectiramea. 



1. Silene acaulis L., Sp. PL ed. 2. 603. 1762. 



San Francisco Peaks (Coconino County), 11,500 to 12,000 feet, July 

 to September. Circumpolar and alpine, in both the Eastern and the 

 Western Hemisphere. 



Moss campion. An attractive little plant, forming mosslike cushions 

 studded with bright pink flowers, among rocks above timberline. 



2. Silene antirrhina L., Sp. PL 419. 1753. 



Coconino and Mohave Counties, south to Cochise, Pima, and 

 (doubtless) Yuma Counties, 6,000 feet or lower, March to May. 

 Throughout temperate North America, Sleepy catchfly. 



3. Silene anglica L., Sp. PL 416. 1753. 



Canyon Lake, Maricopa County {Peebles 3904), Tucson, Pima Coun- 

 ty (Thornber), April. Naturalized in the Eastern United States and 

 in Arizona and California, from Europe. 



4. Silene laciniata Cav., Icon. PL 6: 44. 1801. 



Apache, Navajo, and Coconino Counties, south to Cochise, Santa 

 Cruz, and Pima Counties, 6,000 to 9,000 feet, mostly in pine forests, 

 July to October. Western Texas to California and Mexico. 



Mexican campion. Arizona's showiest species of S'>h ne } with large 

 flowers of a brilliant cardinal red. Most of the Arizona specimens are 

 of the relatively broadleaved var. greggii (Gray) Wats., but a collection 

 by Rothrock, without definite locality, resembles the narrowleaved 

 form that prevails in California. 



