TROPICAL AMERICAN COMPOSITAE. 23 
right in identifying the Bolivian plant with Baker’s inadequately 
characterized EF. conyzoides Vahl, var. incanum of Brazil. However, 
as has been shown elsewhere, FE. 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, ete. 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 em. latis; petiolo 
fere 1 cm. longo; aliter ut apud var. typicum supra descriptum.— 
Bouivia witHout Locauity: 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. subscandens Hieron. It is obviously close to the 
species just described as E. mallotum, 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. subscandens. 
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 paullulo 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 em. dis- 
‘antibus) penniveniis supra lucidulis cum venulis depressis reticulatis 
m nervo medio pubescentibus aliter subglabris subtus rufescenti- 
Pubescentibus leviter reticulatis ca. 1 em. longis 2 cm. latis; petiolo 
I-15 em. longo; panicula oppositiramea pyramidata ca. 1.5 dm. 

