146 NORTH AMERICAN FLORA [Volume 34 



bract solitary, lanceolate; ray-flower wanting; disk-corollas 2.5 mm. long; tube glandular- 

 puberulent, not longer than the glabrous throat; achenes about 1.5 mm. long. 



Type collected at Rio Verde, San Luis Potosi. June, 1904, E. Palmer 26 (herb. N. Y. Bot. Gard.). 

 Distribution: San Luis Potosi and Tamaulipas. 



14. Flaveria oppositifolia (DC.) Rydberg. 



Gymnosperma oppositi folium DC. Prodr. 5: 312. 1836. 

 Flaveria longi folia A. Gray, Mem. Am. Acad. II. 4: 88. 1849. 



A rather stout annual herb; stem 3-10 dm. high, simple below; leaves glabrous, broadest 

 at the sessile base, nearly linear, entire or rarely with spinulose denticulations; heads 10-15- 

 flowered, in ample, rather open, cymes; involucral bracts 5-7, oblong, 4 mm. long; ray- 

 flower wanting; disk-corollas 3 mm. long, glabrous; tube rather shorter than the throat; 

 achenes 1.5 mm. long. 



Type locality: Between San Ferrado and Santander [Tamaulipas]. 

 Distribution: Coahuila to Tamaulipas and Aguas Calientes. 



15. Flaveria floridana T. R. Johnston, Proc. Am. Acad. 

 39: 291. 1903. 



A stout dichotomously branched annual herb; stem striate, glabrous, 5-10 dm. high; 

 leaves linear to lance-linear, rarely denticulate, 2.5-8 cm. long, 3-12 mm. wide, slightly con- 

 nate; inflorescence irregular; glomerules compact, subtended by a whorl of leaves; heads 

 10-13-flowered; involucral bracts subequal, 4 mm. long; ligule oval, 2 mm. long; disk-corollas 

 2.5 mm. long, glabrous; tube shorter than the funnelform throat; achenes 1.5 mm. long. 



Type locality: Sanibel Island, Florida. 

 Distribution: Florida. 



16. Flaveria chloraefolia A. Gray, Mem. Am. Acad. II. 4: 88. 1849. 



A glaucous herb; stem 3-10 dm. high, terete; leaves ovate-oblong to lanceolate, 2.5-10 

 cm. long, 1-3.5 cm. wide, glabrous, connate-perfoliate; heads in open cymes, 1 1-13-flowered; 

 involucral bracts 5, oblong, 6-7 mm. long, the calyculate ones 2, lanceolate; ray-flowers wanting; 

 disk-corollas 6 mm. long, glabrous; tube much shorter than the elongate-funnelform throat; 

 achenes 3 mm. long; squamellae 2-4, hyaline, unequal, incurved, the larger about 0.5 mm. long. 



Type locality: Pelayo, northwest of Mapimi, "Chihuahua" [Durango]. 

 Distribution: Texas to Durango and Nuevo Leon. 



Doubtful or excluded species 



Flaveria peruviana Juss. ; J. F. Gmel. Syst. Nat. 1269 (1791), is Piqueria peruviana (Juss.) 



B. L. Robinson. 

 Flaveria spicata Smith, in Rees, Cycl. 14: Flaveria no. 2 (1810), is the same. 

 Flaveria humillima Schultz-Bip. Linnaea 34: 529, hyponym. 1865. 

 Flaveria perfoliata Klatt, Leopoldina 23: 146 (1887), is Desmanthodium perfoliatum Benth. 



Genera excluded from the tribe 



Thymopsis Benth.; Benth. & Hook. Gen. 2: 407. 1873. Notwithstanding the fertile 

 disk-flowers, this genus evidently belongs to the tribe MilleriEaE, and is most closely related 

 to Tetranthus, in which genus the type species was originally included. 



Thurovia Rose, Contr. U. S. Nat. Herb. 31: 321. 1895. From the structure of the 

 head and the general habit, this apparently belongs to the tribe AsTEREAE, and is probably 

 related to Creenella or Pentachaeta. 



