448 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



4. Lotus hamatus Greene, Pittonia 2: 150. 1890. 



Robles Ranch near Tucson, "on flats" (Goodding 1672), about 2,500 

 feet, April, probably introduced from southern California. 



5. Lotus humistratus Greene, Pittonia 2: 139. 1890. 



Lotus trispermus Greene, Erythea 1: 258. 1893. 

 Anisolotus trispermus Woot. and Standi., Contrib. U. S. Natl. 

 Herbarium 16: 135. 1913. 



Throughout most of the State except the northeastern portion, 

 5,000 feet or (usually) lower, very common on sandy deserts, March 

 to June New Mexico to California and northern Mexico. 



6. Lotus tomentellus Greene, Pittonia 2: 140. 1890. 



Mohave, Maricopa, Pinal, Pima, and Yuma Counties, 3,000 feet 

 or lower, very common on sandy deserts, March and April. Arizona, 

 southeastern California, and northern Mexico. 



7. Lotus salsuginosus Greene, Pittonia 2: 140. 1890. 



Mohave, Maricopa, Pinal, Pima, and Yuma Counties, 2,800 feet 

 or lower, common on dry hills and mesas, February to May. 

 Arizona, California, and Baja California. 



The Arizona specimens all belong to var. brevivexillus Ottley (L. 

 humilis Greene), with plant and flowers smaller than in the typical 

 form. 



8. Lotus rigidus (Benth.) Greene, Pittonia 2: 142. 1890. 



Hosackia rigida Benth., PI. Hartw. 305. 1848. 



Lotus argensis Coville, Contrib. U. S. Natl. Herbarium 4: 83. 



1893. 

 Anisolotus rigidus Rydb., Torrey Bot. Club Bui. 33: 144, 



1906. 



Gila County to Mohave County, south to Pima and Yuma Counties, 

 4,000 feet or lower, dry rocky slopes, February to May. Utah, 

 Arizona, southeastern California, and Baja California. 



This is Arizona's most xerophytic species. 



9. Lotus wrightii (A. Gray) Greene, Pittonia 2: 143. 1890. 



Hosackia wrightii A. Gray, PL Wright. 2: 42. 1853. 

 Anisolotus wrightii Rydb., Torrey Bot. Club Bui. 33: 144. 

 1906. 



Apache County to Coconino County, south to Greenlee and Pima 

 Counties, 4,500 to 8,000 feet, very common in dry open pine forests, 

 June to August. Southern Colorado and New Mexico to Arizona 

 and southeastern California. 



10. Lotus greenei (Woot. and Standi.) Ottley, Wash. Acad. Sci. 



Jour. 29: 483. 1939. 



Hosackia mollis Greene, Calif. Acad. Sci. Bui. 1: 185. 1885. 



Not Nutt., 1838. 

 Lotus mollis Greene, Pittonia 2: 143. 1890. Not Balf. f., 



1882. 

 Anisolotus greenei Woot. and Standi., Contrib. U. S. Natl. 



Herbarium 16: 135. 1913. 



