ROBINSON. — STUDIES IN THE EUPATORIEAE. 39 



Eupatorium gracilicaule Scb. Bip. in herb., fruticosnm 3 m. 

 altum oppositirameuin ; ramis teretibus glaberrimis gracilibus, inter- 

 nodiis ca. 5 cm. longis ; foliis ovatis longe acuminatis basi rotundatis 

 vel brevissime acuminatis 3-nerviis leviter serrato-dentatis plus minusve 

 falcatis utrinque glabris subtus baud vel vix pallidioribus minute 

 glanduloso-punctatis ad 8 cm. longis 3-4 cm. latis, venulis subtranslucen- 

 tibus, petiolo gracili patenti 2-2.5 cm. longo; paniculis magnis 2-3 dm. 

 diametro rotundato-corymbosis oppositirameis folioso-bracteatis multi- 

 capitulatis obscurissime puberulis vel granulosis, ramis laxe patentibus, 

 pedicellis gracillimis saepe flexuosis minute bracteolatis ; capitulis 

 6-8 mm. altis ca. 13-floris ; involucri squamis laxissime imbricatis 

 linearibus acutissimis dorso sordide puberulis, intimis ca. 3 mm. longis 

 subaequalibus 6-9, exterioribus paucis (2-3) brevioribus angustissimis ; 

 achaeniis 5-angulatis gracilibus glabris fuscis deorsum levissime angus- 

 tatis ; corollis glabris 3 mm. longis verosimiliter albidis, tubo proprio 

 gracili in fauces modice ampliatos gradatim expanso, dentibus limbi 

 5 brevibus patentibus ; pappi setis ca. 20 tenuibus albidis aequalibus 

 simplicissimis corollam fere aequantibus. — Tlacolula, Mexico, Dec. 

 1839, Ehrenherg, n. 11,711 (hb. Berol., bb. Gray). This species in habit 

 somewhat suggests E. stilUngiaefoUum DC. and E. Mendezii DC, but 

 differs from each of them in being nearly glabrous and in its much less 

 imbricated involucre, etc. 



Eupatorium hemipteropodum, n. sp., herbaceum robustum ad 

 3 m. altum ; caule meduloso subtereti valde striato-costato glabrato in 

 sicco stramineo-brunnescenti ; foliis oppositis magnis tenuibus ovatis 

 utrinque glabris et viridibus supra levissimis longe petiolatis, inferio- 

 ribus ovatis subacuminatis 1.8-2.5 dm. longis 12-15 cm. latis argute 

 grosseque dentatis basi acuminatis et breviter in petiolo decurrentibns, 

 petiolo 4-6 cm. longo, foliis supremis deltoideo-ovatis 8-10 cm. longis 

 5-7 cm. latis subduplice crenato-serratis basi acuminatis, petiolo fere a 

 media parte apicem versus alato ; panicula ovoidea thyi'soidea opposi- 

 tiramea ca. 7 cm. diametro aequialta multicapitulata ; capitulis ca. 

 10-floris ; involucri squamis stramineis in apice obtuso vel rotundato 

 brunneis pluriseriatim imbricatis, interioribus lineari-oblongis, exterio- 

 ribus gradatim brevioribus ovatis ciliolatis ; corollis anguste tubulosis 

 glabris dentibus limbi brevissimis ; pappi setis sordide albis corollam 

 subaequantibus ; achaeniis valde immaturis in et etiam inter costis 

 pubentibus. — E. quadmngidare Millsp. Field Columb. Mus. Bot. i. 

 324 (1896), not DC. E. jwpuUfoUum Millsp. 1. c, not HBK. E. aroma- 

 tisans Millsp. 1. c. iii. 92, with figs. (1904), not DC. — Yucatan : Izamal 

 (where, ace. to Millspaugh, 1. c, in general cultivation), Gaumer, -n. 552 

 (hb. Field Mus., bb. Gray) ; Merida, Valdez, n. 92 (hb. Field Mus., hb. 



