FLOWERING PLANTS AND FERNS OF ARIZONA 789 



7. Lycium fremontii A. Gray, Amer. Acad. Arts and Sci. Proc. 6: 



46. 1862. 



Lycium gracilipes A. Gray, ibid. 12: 81. 1877. 



Western and southern Arizona, up to about 2,500 feet, throughout 

 the year, mostly January to February. Also in southeastern Cali- 

 fornia and northwestern Mexico. 



The abundant juicy berries produced by this and the preceding 

 species were gathered by the desert Indians for food. Both species 

 are hosts of the destructive root-rot fungus, Phymatotrichum omni- 

 vorum (Shear) Dug. 



8. Lycium torreyi A. Gray, Amer. Acad. Arts and Sci. Proc. 6: 47. 



1862. 

 Western and southern parts of the State, mostly below 3,000 feet, 

 March to June. Southeastern Utah and New Mexico to southeastern 

 California and Mexico. 



9. Lycium andersonii A. Gray, Amer. Acad. Arts and Sci. Proc. 7: 



388. 1868. 



Practically throughout the State, from Coconino and Mohave 

 Counties southward to Graham, Cochise, and Yuma Counties, 

 up to 5,600 feet, February to April (August and September). Utah 

 and New Mexico to California and northwestern Mexico. 



The typical form has the corolla 7 to 14 mm. long, usually 5-merous, 

 and the leaves 3 to 15 mm. long, usually thickened and succulent. 

 The var. deserticola (C. L. Hitchc.) Munz (L. andersonii f. deserticola 

 C. L. Hitchc), with thin, flat leaves up to 35 mm. long, and plants 

 usually large and robust, is not uncommon along washes in Maricopa 

 and Yuma Counties, below 1,500 feet, and in southeastern California. 

 The var. wrightii A. Gray, with corolla 4 to 8 mm. long, usually 4- 

 merous, and leaves 3 to 8 mm. long but occasionally larger, occurs 

 from Greenlee County to Cochise and Yuma Counties, and in Sonora. 



10. Lycium berlandieri Dunal in DC, Prodr. 13: 520. 1852. 

 Greenlee, Maricopa, Pinal, Pima, and Yuma Counties, up to about 



3,000 feet, March to September. Texas to Arizona and Mexico. 



Represented in Arizona by var. parviflorum (Gray) Terrac. (Lycium 

 parviflorum Gray, L. berlandieri var. longistylum C. L. Hitchc, L. 

 berlandieri var. brevilobum C. L. Hitchc), which is distinguished by 

 stout leafy branches and flowers mostly 4 to 6 mm. long. 



2. MARGARANTHUS 



Small annual herbs, resembling Physalis; stems leafy, branched; 

 leaves petioled, the blades thin, entire or somewhat sinuate, ovate or 

 lanceolate; flowers small, solitary, on slender pedicels; corolla sub- 

 globose. 



Key to the species 



1. Stems spreading, diffusely branched from the base; corolla apparently white, 

 deeply cleft, the lobes at least as long as the tube- 1. M. lemmoni. 



1. Steins erect, not or sparingly branched from the base; corolla greenish yellow 

 or lurid purple, cylindric-urceolate, merely denticulate at the orifice. 



2. M. SOLANACEUS. 



