Phytologia (Aug 2004) 86(2) 93 



Sin, Nay, Jal, Mic, Mex, Ver, Gue, Oax, Tab, Cps, Yuc, Cam, Qui 

 and Guatemala southwards, 0-1300 m; all seasons. 



Perennial suffruticose herbs or shrublets 0.5-3.0 m high; stems 

 stiffly erect and divaricate to arching or sprawling; leaves opposite, 3-10 

 cm long, 1-4 cm wide; petioles 0-6 mm long; blades ovate to elliptic- 

 lanceolate, 3-nervate, the undersurface with stout, erect or ascending 

 hairs and below these another layer of rather short, weak, hairs with 

 recurved apices; heads radiate, terminal, 1 -several on ultimate peduncles 

 1-15 cm long; involucres 5-15 mm high, 2-3 seriate, the outer series 

 shorter or longer than the inner; ray florets 5-11, the ligules, 5-14 mm 

 long; disk florets 10-40; chromosome numbers, n = ca 11, 12 and 23 

 pairs. 



A widespread highly variable species, presumably divisible into 

 several infraspecific geographical varieties. The larger-headed, longer- 

 peduncled, more prominently shrubby or divaricately-branched plants 

 from Jal to Cps are perhaps properly called var. scabra, regardless of the 

 disposition of yet other taxa, although Strother (1991) adopted the name 

 W. acapulcensis for the entire complex, feeling that the earlier name, 

 W. scabra, was inadequately typified for his nomenclatural purposes. 

 I can not agree with Strother's widely inclusive treatment, especially 

 his submergence of the well-known, long-established, W. hispida, as a 

 varietal element of W. acapulcensis. He also recognized the varieties 

 parviceps and ramosissima, which appear to be reasonably organized 

 populational phases, having mostly smaller heads on shorter peduncles. 

 Strother cited and mapped two collections of W. s. var. ramosissima as 

 occurring in Tarn and San. I include both of these in my concept of W. 

 ayerscottiana. 



WEDELIA SIMSIOIDES McVaugh, Contr. Univ. Michigan Herb. 9: 

 462. 1972. 



Known only by collections from s Nay, marshy meadows, oak zone, 

 800-900 m; Aug-Sep. 



