TROPICAL AMERICAN EUPATORIEAE. 239 
summit of Chiriqui Volcano, alt. 3374 m., William R. Mazon, no. 
5360 (type U.S.); dry sunny places, upper belt of Chiriqui Volcano, 
northern slope, alt. 3374 m., Pittier, no. 3089 (U. S.); on the same 
mountain but without number or indication of locality or altitude, 
April, 1899, C. Sapper (U. S.). 
A characteristic and probably local species. 
E. (§ Eximbricata) choricephalum, spec. noy., herbaceum 
perenne erectum 3-7 dm. altum; radice e fibris longis numerosis 
subsimplicibus nigrescentibus composita; caule pubescente gracili 
basin versus simplici superne laxe paniculatim ramoso; foliis sub- 
orbiculari-ovatis acuminatis grosse crenatis (dentibus 1.54 mm. 
altis 3-8 mm. basi latis) basi late cordatis ad insertionem petioli 
acuminatis membranaceis utrinque viridibus supra subglabris vel 
sparse hirtellis (pilis saepius adpressis) subtus vix pallidioribus in 
nervis venisque hirtellis ima a basi 3-nerviis 3-7.5 cm. longis 2.5-6 cm. 
latis; petiolo 1.5-3 cm. longo; panicula laxissima 4-6 dm. longa 2-3 
dm. diametro foliaceo-bracteata; bracteolis lanceolatis parvis vel 
minimis; pedicellis filiformibus pubescentibus 8—18 mm. longis; capitu- 
lis dissitis ea. 34-floris 6.5 mm. altis 6 mm. diametro cymoso-dispositis; 
involucri campanulati squamis subaequalibus (una vel duabus multo 
minoribus) oblongo- vel lanceolato-linearibus acutis 4.5 mm. longis, 
exterioribus dorso villosulis, interioribus longiuscule ciliatis aliter 
subglabris saepius 2-costatis et 3-nerviis; corollis albis 3-4 mm. longis, 
tubo proprio gracili glabro 1.6-2 mm. longo, faucibus turbinato- 
subcylindricis 1.2-1.8 mm. longis extus sparse hirtis, dentibus limbi 5 
(vel rariter 4) 0.3 mm. longis deltoideis obtusiusculis intus papillosis 
extus hirsutulis; antheris brevibus basi distincte sagittatis apice cum 
appendice ovato-oblonga munitis; achaeniis nigris 1.5-2 mm. longis 
in costis et etiam in faciebus hispidulis. basi callosis apice cum disco 
cupulato coronatis; pappi setis ca. 28 albis 4 mm. longis paullo sca- 
bratis.— E. grandidentatum, var. laxiflorum Gray in Pringle, Pl. Mex. 
[list of 1886] on first (unnumbered) page, as a name only. E. guada- 
lupense Gray ex Wats. Proc. Am. Acad. xxii. 421 (1887), not Spreng.— 
CummvaHUA: southwestern part, Aug.—Nov., 1885, Palmer, no. 276; 
shaded ravines, Mapula Mts., 30 Oct., 1886, Pringle, no. 747. Dur- 
ANGO: Palmer, no. 857. Jauisco: shaded hillsides, Chapala, 1886, 
Palmer, no 712; ravines near Guadalajara, 14 Oct. 1903, Pringle, no. 
11,924 (type Gr.). MucHoacan: oak woods near Uruapan, alt. 1464 
m., Pringle, no. 10,099. Morrtos: barranca near Cuernavaca, alt. 
1982 m., 23 Nov. 1902, Pringle, no. 11342. Vera Cruz: Orizaba, 
Botteri, no. 494. 
