716 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



1. Boebera papposa (Vent.) Rydb. in Britton, Man. 1012. 1901. 



Tagetes papposa Vent. PI. Jard. Cels pi. 36. 1800. 



Dysodia chrysanihemoid.es Lag. Gen. & Sp. Nov. 29. 1816. 



Dysodia papposa Hitchc. Trans. Acad. St. Louis 5: 503. 1891. 



Type locality: "Illinois." 



Range: Nebraska and Ohio to Arizona and Louisiana and southward. 



New Mexico: Cedar Hill; mouth of Holy Ghost Creek; Pecos; Farmington; 

 Galisteo; Tesuque; El Rito Creek; Folsom; Albuquerque; Raton; Estancia; Beulah; 

 Santa Fe; Cliff; Burro Mountains; Kingston; West Fork of the Gila; Mesilla Valley; 

 White Mountains; Capitan Mountains. Hillsides and roadsides, in the Upper Sonoran 

 and Transition zones. 



88. TAGETES L. 



Slender, diffusely branched annual, 30 cm. high or smaller, with opposite leaves 

 3 to 5-parted into linear-filiform divisions; heads small, with 1 to 3 rays; involucre 

 fusiform, the narrow bracts united for nearly their whole length; achenes slender, 

 glabrate; pappus of 2 oval or truncate thin palese and 2 longer awns. 



1. Tagetes micrantha Cav. Icon. PI. 4: 31. pi. 352. 1797. 

 Type locality: "Habitat in Nova-Hispania iuxta urbem Queretaro." 

 Range: New Mexico and Arizona and southward. 

 New Mexico: Mogollon Creek; near Las Vegas. 



89. ACIPHYLLAEA A. Gray. 



Low shrubby perennial, 20 cm. high or less, with opposite entire rigid filiform leaves 

 and small, nearly sessile heads of yellow flowers with bright yellow rays; involucre 

 of equal, narrowly oblong, gland-dotted bracts in a single series; achenes linear, 

 striate; pappus of 18 to 20 palese, each of these parted above into 3 or 5 capillary 

 bristles. 



1. Aciphyllaea acerosa (DC.) A. Gray, Mem. Amer. Acad. n. ser. 4: 91. 1849. 



Dysodia acerosa DC. Prodr. 5: 641. 1836. 



Hymenalherum acerosum A. Gray, PI. Wright. 1: 115. 1852. 



Type locality: "In Mexici prov. Sancti-Ludovici de Potosi." 



Range: Western Texas to southern Arizona and southward. 



New Mexico: Albuquerque; Plaza Larga; Socorro; Grant County; Tortugas Moun- 

 ain; Tularosa Creek. Dry hills, in the Lower Sonoran Zone. 



90. THYMOPHYLLA Lag. 



Annual or perennial herbs with gland-dotted, alternate or opposite, pinnately 

 parted leaves and small pedunculate heads of yellow flowers; involucre campanulate, 

 the bracts united into a cup; receptacle naked or fimbrillate; achenes linear, striate; 

 pappus of several or many scales or bristles. 



KEY TO THE SPECIES. 



Annuals; divisions of the leaves linear, not rigid. 



Pappus of 5 to 8 oblong erose-truncate scales 1 . T. aurea. 



Pappus of 10 to 20 aristate scales. 



Rays inconspicuous, not surpassing the disk; scales of 



the pappus thick, firm 2. T. neomexicana. 



Rays conspicuous, much surpassing the disk; scales of 



the pappus hyaline 3. T. polychaeta. 



