ROBINSON. — ON CERTAIN EUPATORIEAE. 197 



tain from the number of involucral scales and of the florets in the head 

 that the plant is not a 3Iikania, nor from its habit and alternate leaves 

 does it seem likely that it belongs in the tribe of the Eupatorieae. 



Mikania paezensis, sp. no v., scandens ; caule et ramulis striatis 

 a tomento brevi fusco vel atropurpureo etiam fere nigrescenti tectis ; 

 foliis longiuscule petiolatis oppositis ovatis acutis crenato-denticulatis 

 supra bullato-rugosis pubescentibus subtus pallidioribus tomentosis basi 

 sinu patenti cordatis ca. 4.5 cm. longis ca. 3.5 cm. latis ; petiolo tomen- 

 toso 3-3.5 cm. longo; corymbis ad 7 cm. longe pedunculatis 6-10 cm. 

 diametro planiusculis tomentellis, bracteis foliaceis reductis 0.8-1.6 cm. 

 longis ovatis petiolatis, pedicellis gracilibus 4-6 mm. longis ; capitulis 

 ca. 12 mm. longis; involucri squamis lanceolato-oblongis acutiusculis 

 dorso fusco-tomentellis 8-9 mm. longis ; corollis 5-6 mm. longis, tubo 

 gracili, faucibus campanulatis, limbi dentibus 5 latissime triangularibus 

 erectiusculis apicem versus tomentellis ; achaeniis 5 mm. longis atro- 

 brunneis glabris deorsum decrescentibus argute 5-costato-angulatis ; 

 costis albidis minutissime scabratis. — Las Escaleretas, Moras Valley, 

 Rio Paez basin, Tierra Adentro, State of Cauca, Colombia, altitude 

 2500-3000 m., February, 1906, Pittier, no. 1336 (type, in U. S. Nat. 

 Mus., fragm. in Gray Herb.). Notwithstanding its constantly 5-angled 

 achenes this species seems to be suspiciously near the plant described 

 below as Kanhnia violascens. The two differ sufficiently in leaf-form, 

 indumentum, length of peduncles, size of heads, etc., to be satisfactory 

 as species, but in placing them in different genera (though their tech- 

 nical characters appear to require it) there seems to be some 

 artificiality. 



Mikania parviflora (Aubl.) Karst. Deutsche Fl. 1061 (1883); 

 Urb. ex Hieron. in Engl. Bot. Jahrb. xxviii. 579 (1901). Eupatorium 

 parviflorum Aubl. Fl. Guian. ii. 797, t. 315 (1775). — To the synonymy 

 of this widely distributed and moderately variable species should be 

 added, in the opinion of the writer, the following : Mikania olivacea 

 Klatt, Bull. Soc. Bot. Belg. xxxi. 195 (1892); Rob. & Greenm. Proc. 

 Am. Acad, xxxii. 12 (1896), and Wilhughbya Hieronymi Rusby, Bull. 

 N. Y. Bot. Gard. iv. 383 (1907). As thus interpreted, this species 

 ranges from Costa Rica to Guiana and Bolivia. 



Mikania sulcata (Hook. & Am.), comb. nov. Eupatoritim mlcatnm 

 Hook. & Am. Comp. Bot. Mag. i. 243 (1835). Mikania j?en!<temon- 

 oides DC. Prod. v. 189 (1836). M. pentstemonoides Bak. in Mart. Fl. 

 Bras. vi. pt. 2, 221 (1876). 



Mikania sulcata (Hook. & Am.) Robinson, var. ambigua (DC), 

 comb, nov. M. ambigua DC. Prod. v. 187 (1836). M. pentstemonoides, 

 var. ambigua (DC.) Bak. in Mart Fl. Bras. vi. pt. 2, 221 (1876). 



