34 PROCEEDINGS OF THE AMERICAN ACADEMY, 
rotundatis paululo in petiolum saepe subdecurrentibus 3-6.5 em. longis 
1.6-4 em. latis ; petiolo 1-4 cm. longo subtus convexo subglabro supra 
canaliculato villoso; capitulis 9 mm. longis 6 mm. diametro 20-floris 
numerosis ad apices ramorum glomerato-aggregatis, corymbis rotun- 
datis densiusculis ca. 4 cm. diametro ; pedicellis filiformibus puberulis 
2-6 mm. longis ; involucri campanulati squamis ca. 10 elliptico- vel obo- 
vato-oblongis aequilongis apice rotundatis saepius pulcherrime ciliatis 
dorso pubescentibus 3.2 mm. longis 1.5 mm. latis pallide viridibus; 
corollis albis, tubo proprio gracili 2 mm. longo glabro, faucibus cam- 
panulatis glabris, dentibus limbi 5 deltoideis pilosiusculis ; antheris 
vix connatis apice longe appendiculatis; achaeniis nigrescentibus 5- 
angulatis 1.5 mm. longis sursum praesertim in angulis hispidulis apice~ 
cupula albida coronatis ; pappi setis capillaribus vix barbellatis laete 
albis vel saepissime pulcherrime roseis corollam fere aequantibus ca- 
ucis. — Open moist places, rocks of barranca, Ixtaccihuatl, Mexico, alt. 
. 2440 m., C. A. Purpus, no. 1496 (type, in hb. Gray) ; also in the Valley 
of Mexico, Schaffner, no. 201 (hb. Gray). This species differs from Z. 
pazcuarense HBK. in its very obtuse involucral scales; from E. photinum 
Robinson, in its thin pubescent less attenuate leaves. It is perhaps 
most nearly related to HL. Schaffneri Gray, but it differs from that 
species in its more attenuate-acuminate and more regularly serrate 
leaves which are pinnately veined, while in Z. Schaffneri they are 
palmately nerved from the very base. : 
_ EvPatoriuM PHOENICOLEPIS Robinson, var. guatemalensis Robinson, 
n. var., foliis quam eis formae typicae multo majoribus 12-14 em. longis 
9-10 cm. latis tenuioribus cordatis supra scabriusculis subtus in nervis 
venisque laxiuscule pubescentibus nec tomentosis ; involucri squamis 
et floribus necnon achaeniis formae typicae simillimis. — Vol. Atitlan, 
Department of Solalé, Guatemala, alt. 2500-2700 m., 16 February, 
1906, W. A. Kellerman, no. 5199 (type, in hb. Field Museum of Natural 
History ; fragment in hb. Gray); between Patahil and San Lucas, De- 
partment of Solalé, Guatemala, 15 February, 1906, W. A. Kellerman, 
no. 5194 (hb. Field Mus.). ie , 
Eupatorium saltillense Robinson, n. sp., fruticosum 9-15 dm. 
altum oppositirameum ; ramis teretibus late patentibus arcuato-ascen- 
dentibus a cortice brunneo-griseo obtectis foliosis ; foliis ovatis tenuibus 
translucentibus integris vel obsolete serratis vel plus minusve distincte 
serrato-dentatis vix discoloribus supra sparse pilosulis obseurissime 
_punctatis vel omnino epunctatis subtus minute glanduloso-punctatis et 
praesertim in nervis venisque puberulis apice obtusis vel obtusiuseulis 
humquam attenuatis basi angustatis iri petiolo decurrentibus et margine 
Saepissime revolutis, limbo 4-5.8 cm. longis 2.3-3.3 cm. latis, nervis 
