146 



9. Panicum tennesseense Ashe, Elisha Mitchell Sci. Soc. Jour. 15: 



52. 1898. 

 Santa Catalina Mountains, Pima County (Harrison and Kearney 

 7256). Open ground and borders of woods, Maine to Minnesota, 

 south to Georgia and Texas, also at a few localities in Colorado, 

 Utah, New Mexico, and Arizona. 



10. Panicum huachucae Ashe, Elisha Mitchell Sci. Soc. Jour. 15: 51. 



1898. 



Bright Angel Trail (Coconino County), Fort Huachuca (Cochise 

 County), about 4,000 feet, open ground, type from the Huachuca 

 Mountains (Lemmon in 1882). Nova Scotia to Montana, south to 

 Florida and Texas, also westward in a few scattered localities. 



The var. fasciculatum (Torr.) F. T. Hubb., which is more slender 

 and less pubescent, with thin lax spreading blades sparsely pilose on 

 the upper surface, occurs near Tucson (Tourney 781). It has about 

 the same general range as the species. 



11. Panicum scribnerianum Nash, Torrey Bot. Club Bui. 22: 421. 



1895. 

 Apache, Coconino, and Yavapai Counties, 4,500 to 5,500 feet, open 

 sandy ground, June to September. Maine to British Columbia, south 

 to Maryland, Tennessee, Texas, Arizona, and northern California. 



12. Panicum bulbosum H. B. K., Nov. Gen. et Sp. 1: 99. 1815. 

 Coconino, Yavapai, Cochise, Santa Cruz, and Pima Counties, 5,300 



to 8,000 feet, moist canyons and open woods, July to October. West- 

 ern Texas to Arizona and Mexico. 



The var. minus Vasey (Panicum bulbosum var. sciaphilum Hitchc. 

 and Chase) is a smaller slender form with narrow blades and spike- 

 lets 2.8 to 3.2 mm. long. The variety is as common as the species 

 and has the same range. 



13. Panicum plenum Hitchc. and Chase, Contrib. U. S. Natl. Her- 



barium 15: 80. 1910. 

 Cochise and Santa Cruz Counties, at medium altitudes, along 

 streams and on rocky hills, August to September. Texas to Arizona 

 and Mexico. 



14. Panicum hallii Vasey, Torrey Bot. Club Bui. 11: 61. 1884. 

 Coconino, Yavapai, Greenlee, Cochise, Santa Cruz, and Pima 



Counties, 3,400 to 5,700 feet, dry prairies and rocky hills, August to 

 October. Texas to Arizona and Mexico. 



15. Panicum lepidulum Hitchc. and Chase, Contrib. U. S. Natl. Her- 



barium 15: 75. 1910. 



Nogales, Santa Cruz County (Peebles et al. 4621). New Mexico, 

 southern Arizona, and Mexico. 



This is the only typical specimen of this species from the United 

 States. A collection in the Santa Catalina Mountains (Griffiths 7063) 

 was doubtfully referred to this species by Hitchcock and Chase in 

 their revision of Panicum. 



16. Panicum urvilleanum Kunth, Rev. Gram. 2: 403. 1831. 

 Locality uncertain (Lemmon 4665, in 1884). Sandy deserts, 



Arizona and southern California; Argentina, Chile. 



