1608 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM 



Glabrous, weak shrub; leaves petioled, 2 to 4 cm. long, divided into 3 or 5 

 segments; heads solitary, long-peduncled, about 4.5 cm. wide; involucl-e broad, 

 about 1.5 cm. high, with a calyculus of numerous filiform-subulate phyllaries half 

 as long; pappus paleae dissected into numerous bristles. 



5. Dyssodia aurantia (L.) Robinson, Proc. Amer. Acad. 49: 507. 1913. 

 Aater aurantius L. Sp. PI. 877. 1753. 



Dyssodia appendiculata Lag. Gen. & Sp. Nov. 29. 1816. 



Clomenocoma aurantia Cass. Diet. Sci. Nat. 9: 416. 1817. 



Clappia aurantiaca Benth. in Hook. Icon. PI. 12: 3. pi. 1104- 1872. 



Guerrero, Veracruz, and Oaxaca; type from Veracruz. 



Shrub, essentially glabrous; leaves petioled, 2 to 5.5 cm. long, pinnati.sect into 



3 or 5 segments, the lateral sessile or short-stipitate, the terminal slender-stiped; 

 involucre about 1.2 cm. high. 



6. Dyssodia porophylloides A. Gray, Mem. Amer. Acad. n. ser. 5: 322. 1854. 

 Lchetinn poropfu/lluides A. Nels. Bot. Gaz. 47: 435. 1909. 



Clomenocoma porophylloides Rydb. N. Amer. Fl. 34: 166. 1915. 



Northern Baja California; Sonora. Arizona and southern California; type from 

 San Felipe, California. 



Suffrutescent, 0.3 to 1 meter high, glabrous; leaves short-petioled, 3 cm. long 

 or less, deeply cut into 3 or 5 linear to lanceolate or cuneate lobes, these entire or 

 toothed; heads solitary, long-peduncled; involucre about 12 mm. high. 



7. Dyssodia tagetiflora Lag. Gen. & Sp. Nov. 29. 1816. 

 Boebera fastigiata H. B. K. Nov. Gen. & Sp. 4: 198. 1820. 

 Boebera tagetiflora Spreng. Syst. Veg. 3: 545. 1826. 



Jalisco to Veracru^and Oaxaca; type from Mexico, without definite locality. 

 Suffrutescent or herbaceous, up to 90 cm. high, sparsely pubescent; leaves 2 to 



4 cm. long, pinnatisect, the segments 3 to 13, linear or linear-oblanceolate, serrate, 

 the lower ones smaller; heads terminating the branches, about 1.8 cm. wide, 

 yellow, long-peduncled; involucre about 8 mm. high; pappus paleae dissected into 

 numerous unequal bristles, the central one longest. 



8. Dyssodia pinnata (Cav.) Robinson, Proc. Amer. Acad. 49: 508. 1913. 

 Aster pitinatus Cav. Icon. PI. 3: 6. pi. 212. 1795. 



Dyssodia pubesccns Lag. Gen. & Sp. Nov. 29. 1816. 



Dyssodia subintegerrima Lag. Gen. & Sp. Nov. 29. 1816. 



Boebera pubescens Spreng. Syst. Veg. 3: 544. 1826. 



Boebera subintegerrima Spreng. Syst. Veg. 3: 545. 1826. 



Rosilla lutea Less. SA'n. Gen. Comp. 245. 1832. 



Boebera incana Lindl. Bot. Reg. 19: pi. 1602. 1833. 



Dyssodia incana DC. Prodr. 5: 640. 1836. 



Clomenocoma pinnata DC. Prodr. 5: 641. 1836. 



Dyssodia integerrima Hemsl. Biol. Centr. Amer. Bot. 2: 219. 1881, as synonym. 



Boebera pinnata Rydb. N. Amer. Fl. 34: 168. 1915. 



Coahuila to Tamaulipas, south to Puebia and Veracruz. 



Suffrutescent or herbaceous, 35 cm. high or less, pubescent; leaves 2 to 4 cm. 

 long, pinnatisect, the segments usually 5 or 7, linear or narrowly linear-oblance- 

 olate, entire or few-toothed; heads terminating branches, 2 to 2.8 cm. wide, yellow; 

 involucre about 8 mm. high; pappus as in D. tagetiflora. 



9. Dyssodia acerosa DC. Prodr. 5: 641. 1836. 



Aciphyllaea acerosa A. Gray, Mem. Amer. Acad. n. ser. 4: 91. 1849. 

 Hymenatherum acerosum A. Gray, PL Wright. 1: 115. 1852. 

 Dyssodia fiisca A. Nels. Bot. Gaz. 47: 436. 1909. 



Sonora to Coahuila, south to Zacatecas, Hidalgo, and San Luis Potosi; type 

 from San Luis Potosf. Texas to Arizona and Nevada. 



