268 FIELD COLUMBIAN MUSEUM BOTANY, VOL. II. 



either linear or 3 -parted with linear divisions instead of lan- 

 ceolate-linear and entire, as indicated in the original character- 

 ization. 



Gymnolomia scaberrima Greenman, n. comb. G. platylepis Gray, 

 Proc. Am. Acad. xix. 5 (1883) ; Rob. & Greenm. Proc. Bos. Soc. 

 Nat. Hist. xxix. 102 (1899), excluding plants of Pittier. G. decur- 

 rens Klatt, Leopoldina, xxiii. 90 (1887). Tithonia scaberrima 

 Benth. in Kjoeb. Vidensk. Meddel. 1852, p. 91 & Gen. PI. ii. 

 368; Walp. Ann. v. 223 (1858). T. platylepis Schz. Bip., ace. 

 to Benth. & Hook. f. Gen. PI. ii. 368 (1876). Mirasolia scaber- 



3- rima Benth. & Hook. f. 1. c. 375; Hemsl. Biol. Cent. -Am. Bot. 

 ii. 1 68 (1881). Perymeniopsis perfoliata Schz. Bip., ace. to 

 Klatt., 1. c. In addition to the specimens cited under G. platy- 

 lepis Gray by Robinson and Greenman, 1. c. (excluding Pittier's 

 nos. 3136, 3735), the following collection may be recorded, 

 GUATEMALA. Department of Socatepdquez : Volcano Agua, alti- 

 tude 2440 m., 18 February, 1905, Prof. W. A. Kellerman, no. 

 5361 (hb. Field Mus.). 



Following the International Rules of Botanical Nomencla- 

 ture, adopted by the International Botanical Congress held at 

 Vienna in 1905, it becomes necessary to form the above binomial 

 for this well known south Mexican and Central American species. 



Wedelia rugosa Greenman, sp. nov. 



An herbaceous perennial: stems erect or nearly so, 5 dm. or 

 more high, simple or branched, subterete, strigose-hispid with 

 upwardly appressed hairs: leaves opposite, short-petiolate, 

 oblong to oblong-lanceolate, 3 to 10 cm. long, 1.5 to 5 cm. broad, 

 acute or obtuse, entire or slightly crenate-dentate, rounded to 

 subcordate at the base, tuberculate-hispid and rugose above, 

 hirsute-hispid and strongly reticulate-nerved beneath; petioles 

 2 to 5 mm. long: inflorescence terminating the stem and branches 

 in few-headed cymes: heads radiate, 5 to 8 mm. high, including 

 the rays 10 to 16 mm. in diameter; peduncles 0.5 to 4 cm. long, 

 strigose-hispid: involucre campanulate; bracts of the involucre 

 biseriate, oblong to elliptic-ovate, 3 to 4 mm. long, i to 1.5 mm. 

 broad, obtuse or acute, externally appressed-pubescent : ray- 

 flowers 12 to 14, fertile; rays yellow, about 6 mm. long, 2.5 mm. 

 broad, 2-3-dentate; achenes 3-angled: disk-flowers numerous; 

 achenes at first laterally compressed, densely atomiferous- 

 glandular over the upper one-third, glabrous below, at maturity 

 oblong, 2.5 mm. long and subquadrangular in cross-section: 

 pappus of both ray- and disk-flowers a fimbriate crown of 2 (-3) 

 small scales at the angles of the achene with minute more or 

 less coalescent intermediate scales : pales of the receptacle rather 

 conspicuous, more or less uncinate- tipped especially in the 

 mature state. Wedelia reticulata Greenm. in Trans. Acad. 

 Sci. St. Louis, vii. 434 (1897), not DC. CUBA. Province of 

 Santa Clara: Abresus, 29 June, 1895, Robert Combs, no. 269 

 (hb. Field Mus.), type. Province of Havana: Managua, 19 



