STUDIES IN TOE EUPATORIEAE (ASTERACEAE) CCXXIII. NEW CX)^€INATIONS AND NEW SPECIES OF CENTRAL AND SOUTH AMERICA. R. M. King and H. Robinson Department of Botany National Museum of Natural History Smithsonian Institution, Washington, D.C. 20560. The completion of the generic treatment of the Eupatorieae has not ended the need for new combinations and new descriptions of members of the tribe. The following new combinations and new species belong to the various genera Ageratina , Barrosoa , Bart-lettina , Cronquistianthus , Mikania , and Neocuatrecasia . Ageratina celestini (Cuatr.) R. M. King and H. Robinson, comb. nov. Eupatorium celestini Cuatr., Trab. Mus. Nac. Cienc. Nat. Madrid, ser. Hot. 27: chart 12. 193*^; 29: 15-16, fig. 2. 1935. Colombia. The type of the species in Madrid has been seen and the species appears to be distinct from any others presently recog-nized from the Colombian Andes. The species is similar to others with fewer-flowered heads in the northern Andes such as Ageratina mutiscuensis (B. L. Robins.) K.& R., 1. bovacensis , and ^. pseudochilca (Benth.) K.& R., but the heads are distinctly larger, being 11-12 mm in height. Barrosoa atlantica R. M. King and H. Robinson, sp. nov. Plantae herbaceae perennes ad 1 m altae base decumbentes. Caules fulvi teretes leniter striati, internodis inferioribus 0.7-2.5 cm longis superne longioribus. Folia opposita, petiolis angustis 1.0-1.5 cm longis distaliter indistincte terminatis; laminae ellipticae vel oblanceolatae 3.5-7.0 cm longae et 0.7-2.3 cm latae base anguste acuminatae margine remote serrulatae vel integrae supra glabrae subtus pallidiores distincte glandulo-punctatae, nervis secundariis utrinque ca. 2 valde ascendentibus subtrinervatis. Inflorescentiae terminales elongate thyrsoideae in ramis elongatis distaliter cymosae, bracteis primariis folii-formibus l-^J cm longis decreascentibus, ramulis ultimis 2-4 mm longis minute puberulis pauce minute bracteiferis. Capitula late campanulata ca. 5 mm alta et ^ mm lata; bracteae involucri fulvae eximbricatae obi ongo-ellipticae 1.5-3.0 mm longae et 0.3-1.0 mm latae margine anguste scariosae superne puberulo-fimbriatae apice breviter obtusae interdum apiculatae extus bicostatae et medio-criter glandulo-punctatae; receptacula conica glabra submargine pauce anguste paleaceae. Flores in capitulo ca. 20; corollae albae ca. 3 mm longae, tubis cylindricis ca. 1.3 mm longis glabris, faucibus anguste campanulatis ca. 1.1 mm longis, lobis 62
BioStor
