542 



PEOCEEDINGS OP THE AMERICAN ACADEMY. 



Actinomerls Wrightii, Gray, PI. Fentll. 85. — Rocky places iu woods, 

 W. Texas, Lindheimer, nos. 37, 38, 643, Wright. 



•*- •<- Species of the S. E. United States. 



++ Leaves coarsely serrate-dentate : rays very long. 



20. V. NUDiCAULis, Gray, Proc. Am. Acad. xix. 12 (1883), & Syn. 

 FI. i. pt. 2, 288 ; Chapm. Fl. S. U. S. ed. 3, 255. Helianthus^ aristatus, 

 Ell. 8k. ii. 428. Actinomerls tiudicaidis, Nutt. Trans. Am. Phil. Soc. 

 vii. 364; Torr. & Gray, Fl. ii. 336. — Rich pine woods, Georgia, Bog- 

 hin ; Alabama, Buckley, Donndl Smith; Florida, Chapman, Curtiss, uos. 

 19, 5910, Nash, no. 2202. 



■M- ++ Leaves remotely serrulate or subentire : rays very short. 



21. V. Warei, Gray, 11. cc. Actinomer is -pauci flora, Nutt. Am. Jour. 

 Sci. V. 301, & Trans. Am. Phil. Soc. vii. 364. — Low pine barrens, 

 W. Florida, Ware, Chapman. 



§ 6. SONORICOLA. Heads large or medium-sized, seldom numerous : 

 rays yellow, often pale ; scales of the involucre narrowly to broadly 

 oblong ; awns of the pappus long and slender, at least when young much 

 longer than the breadth of the achene : leaves opposite (at least below), 

 ovate (lanceolate in F. cliilmahuensis), not decurrent along the stem. 

 Stems wingless, often ligneous. Species of the general Sonoran region 

 forming a natural group. 



* Body of the mature achenes 6 to 10 mm. long. 



■*- Leaves sessile. 



22. V. DissiTA, Gray, Proc. Am. Acad. xx. 299. — Lower California, 

 near Todos Santos Bay, Orcutt, no. 1233, and La Guilla, no. 1355. 



■'- -1- Leaves on broadly winged auriculate-clasping petioles : Lower Californian. 



23. V. Palmeki, AVats. Proc. Am. Acad. xxiv. 56 (1889). — Moun- 

 tain Canons, Los Angeles Bay, Lower California, Palmer, no. 528. 



•^ t- -t- Leaves on long narrowly winged exauriculate petioles: Mexican. 



24. V. LEPTOCH.^TA, Gray, Proc. Am. Acad. xxi. 389 (1886). — ■ 

 S. W. Chihuahua, Palmer, no. 170. 



* * Body of achenes 4 to 5 mm. long, glabrous ; wings broad, fringed. 



25. Y. EROSA, Brandegee, Proc. Calif. Acad. Sci. ser. 2, iii. 146 

 (1891). — Sierra de San Francisquito, Lower California, Brandegee. 



