ROBINSON. — STUDIES IN THE EUPATORIEAE. 35 



by the presence of the aristate pappus, which is quite lacking in 

 K Pringlei 



Fleischmannia arguta, n. comb. Eupatorium argutum HBK. 

 Nov. Gen. et Spec. iv. 121 (1820). E. quinquesetum Benth. ex Oerst. 

 Vidensk. Meddel. 1852, p. 79. Fleischmannia rhodostyla Sch. Bip. 

 Flora, xxxii. 417 (1850). The type of Eupatorium argutum HBK. is 

 still extant at the Museum of Natural History in Paris, It is clearly 

 just the plant which has long passed as Fleischmannia rhodostijla and 

 its much earlier specific name must accordingly be taken up. 



Trichocoronis sessilifolia, n. comb. Argeratum sessili/olium 

 Schauer, Linnaea, xix. 715 (1847) ; Hemsl. Biol. Cent. -Am. Bot. ii. 83 

 (1881). Trichocoronis Greggii Gray, PI. Wright, i. 89 (1852). The 

 type of Schauer's Ageratum sessili/olium is Aschenborn's no. 4, of 

 which there is a well preserved specimen in the Royal Botanical 

 Museum in Berlin. The habitat is given as Mexico, but without more 

 particular locality, and the species has remained obscure. On exami- 

 nation it proves to be identical with the species later described as 

 Trichocoronis Greggii by Dr. Gray. Gregg's plant (no. 807 of his last 

 Mexican collection) is said to have come from the region between 

 Mazatlan and the City of Mexico. Fortunately Mr. Pringle has redis- 

 covered the species, and the fuller data of his label give definite infor- 

 mation of at least one station, namelj', marshes of Atequiza in the 

 state of Jalisco. Priority necessitates the transference of the original 

 specific name. 



EuPATORiopsis HoFFMANNiANA Hicron. in Engl. Bot. Jahrb. xviii. 

 Beibl. 43, p. 4G (1893). This Brazilian monotype was placed by its 

 author in the subtribe Piqnerinae. Dissection, however, shows that 

 the anthers have distinct apical appendages quite as well developed as 

 in many of the Ageratinae. There can be no doubt that the true 

 affinity of the genus is with Trichocoronis Gray, PI. Fendl. 65 (1849), 

 with which it agrees closely in general habit, in its opposite sessile 

 leaves, its long pedicelled heads, campanulate involucre with subequal 

 subherbaceous bracts, its short purplish corollas with capanulate throat, 

 and in its abortive setiform pappus. In fact, almost its only claim to 

 generic separation is in its broad obovate quasi two-winged achenes, 

 those of Trichocoronis being narrow and prismatically 4-5-angled. 



Dissothrix imbricata, n. comb. Stevia imbricata Gardn. in Hook. 

 Lond. Jour. Bot. v. 458 (1846). Dissothrix Gardneri Gray in Hook. 

 Jour. Bot. & Kew Misc. iii. 223 (1851); Bak. in Mart. Fl. Bras. vi. pt. 

 2, 272 (1876). Dr. Gray's specific name, coined at a time of greater 

 nomenclatorial laxity, must, according to priority, give place to the 

 original name given by Gardner. 



