40 B. L. Robinson. 



paucis inaequalibus sursum scabridis purpurascentibus ca. 2 mm longis 

 caducissimis. 



Under oaks, cool slopes of mountains above Etzatlan, Jalisco, Mexico, 

 24 October 1904, C. G. Pringle, no. 8859 (type, in hb. Gr.). 



4. Eupatorium chrysostylum Robs., 1. c. p. 274. 



Herbaceum e radice lignosa suberectum 2 — 3 dm altum, caulibus 

 compluribus flexuosis subsimplicibus mollissime albo-lanatis, pilis per- 

 longis tenuibus patentissimis plus minusve viscosis; foliis oppositis petio- 

 latis deltoideo-ovatis acutis grosse et argute dentatis ca. 3 cm longis 

 2,5 cm latis tenuibus concoloribus utrinque viridibus sed a grisea pubes- 

 centia tectis; petiolo 1 — 1,5 cm longo patente tomentoso; paniculis rotun- 

 datis compactis multicapitulatis terminalibus vel subterminalibus, pedicellis 

 3 — 7 mm longis viscoso-tomentosis; capitulis ca. 30-floris 12 mm longis, 

 involucro turbinato-cylindrico, squamis lanceolato-linearibus viridibus striato- 

 nerviis valde inaequalibus multiseriatim imbricatis adpressis acutissimis 

 dorso margineque griseo-pubescentibus; corollis glabris flavescentibus vel 

 virescentibus longe tubulosis sursum sub limbo brevi 5-dentato erecto vel 

 modice patente leviter angustatis ca. 5 mm longis; antheris linearibus 

 apice appendice ovato-lanceolata munitis; stylis clavatis valde exsertis 

 aureis conspicuis; achaeniis gracilibus 4 mm longis nigris pubescentibus 

 deorsum leviter angustatis basi callosis; pappi setis ca. 25 vix barbellatis 

 valde inaequalibus albis. 



Dry ledges, rocky hills near Chihuahua, Mexico, 17 April 1885, 

 C. G. Pringle, no. 135 (type, in hb. Gr.). This plant, although distri- 

 buted as E. Parryi Gray, differs from that species conspicuously in its 

 tar more copious and less glandular pubescence, its more sharply toothed 

 leaves, which are truncate rather than cordate at the base, and in its 

 dense inflorescence, the pedicels in E. Parryi being two to four times 

 as long and the heads relatively tew. 



5. Eupatorium leucoderme Robs., 1. c. p. 274. 



Pruticosum; ramis teretibus flexuosis albidis laevibus, ramulis fulvo- 

 tomentellis; foliis oppositis oblongo-lanceolatis tenuibus utrinque viridibus 

 3-nerviis serratis vel subintegris 5 — 7 cm longis 2 — 2,5 cm latis utrinque 

 praecipue in nerviis fulvo-puberulis subtus crebr-e nigro-punctatis apice 

 attenuato-acuminatis basi obtusis vel rotundatis; nerviis a venulis trans- 

 versariis quam eae Miconiae connexis; petiolo ca. 6 mm longo gracili 

 flexuoso fulvo-tomentello; paniculis lateralibus oppositirameis dense co- 

 rymboso-thyrsoideis 6 — 9 cm diametro; capitulis ca. 6-floris sessilibus in 

 glomerulis rotundatis congestis; squamis involucri lanceolato-linearibus 

 acuminatis valde inaequalibus subuniseriatis dorso fulvo-puberulis; corollis 

 albis anguste tubulosis 4 mm longis, limbo resinoso-punctato leviter am- 

 pliato brevissime 5-dentato; achaeniis prismaticis vix 3 mm longis; setis 

 pappi ca. 40 barbellatis 3,5 mm longis sordido-albis; antheris breviter sed 

 distincte in apice appendiculatis. 



Sandy soil, Chuta, Michoacan or Guerrero, Mexico, alt. 25 m, 20 June 

 1898, E. Langlasse, no. 183 (type, in hb. Gr.). In habit this species 



