TROPICAL AMERICAN COMPOSITAE. 23 



right in identifying the Bolivian plant with Baker's inadequately 

 characterized E. conyzoides Vahl, var. incanum of Brazil. However, 

 as has been shown elsewhere, E. conyzoides Vahl (as well as the much 

 earlier E. conyzoides Mill.) drops definitely into the synonymy of 

 E. odoratum L., a plant with smaller heads, paler involucral scales, 

 more rhombic-ovate leaves of much greater size and less pubescence, 

 longer petioles, etc. Of the varietal names, neither tomentosum nor 

 incanum is satisfactorily available for use in the specific rank because 

 of earlier hymonyms of possible validity. Accordingly it seems best 

 to give this doubtful plant a new start as an independent species 

 under a fresh name. 



Var. ? aporum, var. nov., foliis lanceolato-ovatis gradatim acumi- 

 natis basi rotundatis supra densiuscule puberulis subtus pallidioribus 

 griseo-tomentellis usque ad 5.2 cm. longis et 2.4 cm. latis; petiolo 

 fere 1 cm. longo; aliter ut apud var. typicutn supra descriptum. — 

 Bolivia without locality: Bang, no. 2875 (Gr., U. S.). This 

 plant with its tomentellous round-based leaves and rather dense 

 inflorescence cannot be satisfactorily placed in the Peruvian E. 

 clematitis DC. (under which name it was distributed). Its fine and 

 rather copious pubescence keeps it also from being placed in the 

 nearly related E. snbscandcns Hieron. It is obviously close to the 

 species just described as E. viallotum, but while the several collections 

 of that plant already secured have consistently the small deltoid- 

 ovate very short-petioled leaves which give the species a highly 

 characteristic appearance, this possible variety differs considerably 

 in the form and dimensions of the leaf-blade and in having decidedly 

 longer petioles, in these regards showing an approach to E. siihscandens . 

 Until much more copious material is available to show the direction 

 and extent of its variability, the plant must remain uncertain and for 

 the present it seems best to give it the provisional classification above 

 indicated. 



E. (§ Subimbricata) Mathewsii, spec, nov., fulvo-tomentosum 

 perenne verisimiliter fruticosum basi ignotum; caulibus ramisve 

 curvato-adscendentibus teretibus foliosis 4 mm. diametro post exsic- 

 cationem pauUulo costulatis; internodiis 3-6 cm. longis; foliis oppo- 

 sitis lanceolatis utroque attenuato-acuminatis caudatis remote 

 cuspidato-serratis (dentibus- acutis 1-2 mm. longis ca. 1.5 cm. dis- 

 tantibus) penniveniis supra lucidulis cum venulis depressis reticulatis 

 in nervo medio pubescentibus aliter subglabris subtus rufescenti- 

 pubescentibus leviter reticulatis ca. 1 cm. longis 2 cm. latis; petiolo 

 1-1.5 cm. longo; panicula oppositiramea pyramidata ca. 1.5 dm. 



