FLOWERING PLANTS AND FERNS OF ARIZONA 799 



1. Nicotiana glauca Graham, Edinb. Phil. Jour. 1S2S: 174. 1828. 

 Greenlee, Gila, Maricopa, Pinal, Cochise, Pima, and Yuma Coun- 

 ties, common below 3.000 feet, flowering nearly throughout the year. 

 Texas to southern California ; naturalized from South America, 



Tree-tobacco. Stems up to 4 m. (13 feet) high. A conspicuous 

 plant in southern Arizona, along streams, ditches, and dry washes. 



2. Nicotiana trigonophylla Dunal in DC, Prodr. IS 1 : 562. 1852. 



Xicotiana palmeri A. Gray, Syn. Fl. 2 1 : 242. 1878. 



Practically throughout the State, 6,000 feet or (usually) lower, very 

 common along sandy washes, flowering the year around, type of N. 

 palme/i from Williams River (Palmer 433). Western Texas to 

 southern California and Mexico. 



The plant is sometimes perennial in southwestern Arizona. 



3. Nicotiana clevelandi A. Gray, Syn. FL ed. 2, 2 l : 242. 1886. 

 Fort Mohave (Cooper 415), and rather frequent in southern Yuma 



County, 500 feet or lower, sandy washes, March and April. West- 

 ern Arizona, southern California, and Baja California. 



4. Nicotiana attenuata Torr. ex S. Wats, in King, Geol. Expl. 40th 



Par. 5: 276. 1871. 

 Almost throughout the State, 1,000 to 7,000 feet, common along 

 streams and washes, May to September. Utah to Texas, Arizona, 

 and California. 



10. PETUNIA 



Plant annual, glandular-puberulent; stems prostrate and rooting at 

 the nodes, diffusely branched, forming mats, leafy; leaves narrow, 

 rather fleshy, seldom more than 1 cm. long; flowers solitary, lateral, 

 4 to 6 mm. long; corolla funnelform, slightly irregular, with a purple 

 limb and a whitish tube. 



1. Petunia par vifloraJuss., Paris Mus. Hist. Nat, Ann. 2:216. 1803. 



Navajo County to Graham, Maricopa, Pima, and Yuma Counties, 

 1,000 to 5,000 feet, moist soil in beds of streams and muddy flats, 

 April to September. Southern Florida to California, south to tropical 

 America. 



The Arizona plant is a humble relative of the showy cultivated 

 petunias, which are derived from 2 South American species, P. axillaris 

 and P. violacedj and from hybrids between them. 



110. SCROPHULARIACEAE. 39 Figwort family 



Plants annual or perennial, a few shrubby, in some genera partially 

 parasitic; leaves opposite or alternate, simple, the blades entire to 

 pinnately parted; flowers perfect, very irregular to nearly regular; 

 calyx 4- or 5-toothed or -lobed; stamens inserted on the corolla tube, 

 commonly 4, in unequal pairs, a fifth stamen (staminode) often pres- 

 ent but nonfunctional, or sometimes only 2 of the stamens perfect, or 

 (in 1 genus) all 5 of the stamens perfect; style 1, the stigma entire or 

 2-lobed, the ovary superior, more or less completely 2-celled ; fruit a 

 2-valved capsule; seeds usually many. 



36 Reference: Pexnell. Francis W. new species of scbophttlariaceae from arizon a. Notul Nat 

 Acad. Nat. Sei. Phila. 43: 1-10. 1940. 



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