166 PROCEEDINGS OP THE AMERICAN ACADEMY. 



petiole, acuminate, entire, above scabrous, beneath tomentose-canescent : 

 peduncles solitary, terminal ; involucre several-seriate ; bracts ovate, ob- 

 tuse ; ray-flowers about 20 ; ligules exceeding the disk, dentate at the 

 apex. — Leopoldina, xxv. 105 (1889). — Central America. Specimens 

 examined, — Guatemala : Bernouilli, no. 1077 (tracing, in herb. Gray). 



•w ++ Annuals. 



42. Z. rudis, Baker. A much-branched herb, 6 to 12 dm. high; 

 branches densely hispid : leaves broadly ovate to ovate-lanceolate, acu- 

 minate usually at both ends, irregularly serrate-dentate, short-petioled, 

 strongly hispid-pubescent on both surfaces: peduncles 0.5 to several cm. 

 lone, borne in a lax corymb; involucre campanulate, 5 to 8 mm. broad, 

 about 2-seriate ; bracts lanceolate, with foliaceous tips, acute : ray-flowers 

 about 10; ligules oblanceolate, 1 cm. long: achenes 2 to 3 mm. long, 

 laterally compressed, pubescent ; awns 2 to 3, short : squamellae united 

 into a short cup, confluent with the awns. — Bak. in Mart. Fl. Bras. vi. 

 pt. 3, 188 (1884). Wedelia rudis, Benth. in herb, ex Bak. 1. c. — South 

 America. Specimens examined, — Brazil : Falls of the Madeira, Rusby, 

 2142. 



Doubtful and Excluded Species. 



Zexmenia (?) in sched. pi. Rusby, no. 2138. Galea, Britton, Bull. 

 Torr. Bot. Club, xix. 151 (1892). This plant, if one may judge by the 

 specimen received under the number at the Gray Herbarium, is certainly 

 neither a Zexmenia nor a Galea. It has sterile ray-flowers and the pap- 

 pus of a Viguiera. 



Zexmenia in sched. pi. Bang, no. 546, is Oyedaea Pearcei, Rusby, Mem. 

 Torr. Bot. Club, iii. pt. 3, p. 59 (1893). 



Z. caracasana, Benth. & Hook. f. Gen. ii. 371 (1873), is better treated 

 as Wedelia caracasana, DC. 



Z. caracasana, Klatt, Bull. Soc. Bot. Belg. xxxi. 202 (1892), is a 

 mixture. Pittier's no. 3737 is apparently a Wedelia, while his no. 7019 

 is Baltimora scolospermum, Steetz. 



Z. dulcis, Coulter, Bot. Gaz. xvi. 99 (1891), is not clearly distinguish- 

 able from Z. scandens, Hemsl., but Mr. J. D. Smith's nos. 2854 and 

 6G10, referred to Z. dulcis by Coulter in J. D. Smith, Euum. PI. Guat. 

 iv. 86 (1895), seems better placed in Z. virgidta, Klatt. 



Z. fascicidata, Coulter in J. D. Smith, Enum. PI. Guat. iv. 86 

 (1895), as to no. 4244, is Perymenium grande, Hemsl., var. strigillosum, 

 Robinson & Greenman. 



