940 MISC. PUBLICATION 423, U. S. DEPT. OF AGRICULTURE 



6. Gnaphalium pringlei A. Gray, Amer. Acad. Arts and Sci. Proc. 



21: 387. 1886. 



Mazatzal Mountains (Gila County) and mountains of Cochise, 

 Santa Cruz, and Pima Counties, 4,000 to 5,000 feet, canyons, August 

 to October. Southern Arizona and Chihuahua. 



Not previously recorded from the United States. 



7. Gnaphalium grayi Nets, and Macbr., Bot. Gaz. 61: 46. 1916. 



Gnaphalium strictum A. Gray, U. S. Rpt. Expl. Miss. Pacif. 4: 

 110. 1857. Not G. strictum Lam., 1788. 



White Mountains (Apache and Greenlee Counties), Kaibab Plateau, 

 San Francisco Peaks (Coconino County), 6,000 to 9,500 feet, moun- 

 tain meadows, August and September. Wyoming to New Mexico 

 and Arizona. 



8. Gnaphalium palustre Nutt., Amer. Phil. Soc. Trans, ser. 2, 7: 403. 



1841. 

 Coconino, Yavapai, Gila, Maricopa, Pinal, and Pima Counties, 

 1,200 to 5,000 feet, moist soil, April to October. Alberta and British 

 Columbia to New Mexico, southern Arizona, and California. 



9. Gnaphalium purpureum L., Sp. PL 854. 1753. 



Rincon, Santa Catalina, and Baboquivari Mountains (Pima 

 County), 2,800 to 7, 500. feet, March to May. Maine to Kansas and 

 southern Arizona, also British Columbia to California. 



38. LAGASCEA 6 " 



Pubescent shrub about 1 m. high; leaves opposite, ovate, petioled, 

 acuminate ; heads 1-flowered, small, crowded at the tips of the branches 

 in dense glomerules, these subtended by a few herbaceous bracts; 

 involucre of the individual heads tubular, gamophyllous, 5- or 6- 

 toothed; corolla tubular, yellow; achene columnar; pappus a short 

 crown. 



1. Lagascea decipiens Hemsl., Diagn. PL Mex. 33. 1879. 



Nocca decipiens Kuntze, Rev. Gen. PL 1: 354. 1891 (as 



Noccaea) . 

 Calhounia nelsonae A. Nels., Wyo. Univ. Pub. Bot. 1: 55. 



1924. 



Oro Blanco Mountains (Santa Cruz County) , Baboquivari Mountains 

 (Pima County), about 4,000 feet, canyons, December to May, type 

 of Calhounia nelsonae from the Baboquivari Mountains (Hanson 

 1023). Southern Arizona and Mexico. 



39. GUARDIOLA'O 



Branching perennial, up to 1 m. high, glabrous, somewhat glaucous; 

 leaves opposite, roundish-ovate, obtuse, toothed, subcordate, very 

 short-petioled; heads rather small, in terminal cymose clusters, 

 radiate, the corollas white, the anthers green; involucre cylindric, of 



69 Reference: Robinson, B. L. synopsis of the genus nocca. Amer. Acad. Arts and Sci. Proc. 36 



(Gray Herbarium Contrib. 20): 467-471. 1901. 



70 Reference: Robinson, B. L. revision of the genus guardiola. Torrey Bot. Club Bui. 26: 232-235. 



