PBOCEEDINGS OF THE AMERICA!) ACADEMY. 



;n molliter hirsutnm, pilis Longis patentibas plus minusve monili- 



fonnibus albia viscidulia inaequalibus j foliia oppositie deltoideia vel 



deltoideia ! tiolatia late oordatia grosse duplicateque ci 



dentatis tenuibaa atrinque praesertim Bubtua in oervia pubescenti- 



, limbo l l-l- cm. longo v LO cm. lato, petiolo sursum alato ca. 7 cm. 



loDgo hireuto ; panicula oppositiramea ; capitulis ca. 11 Boris 10-11 mm. 



longis I 5 mm. diametro ; pedicellis gracilibua rectis valde inaequalibaa 



12 nun. Longis; involucri aquamia lanceolatis attenuatis peracutia 



I seriatia valde imbricatia viridibaa albo oen iia bispidnlia adpressis . 



rollia angu8ti8sime tubnlosia 3.5 nun. Longis viridiscenti-albidis, 



cibua \ix ullis; dentibus limbi brevissimia erecti8 ; atyli ramie valde 



lurantiacia vel maturitate brunnescentibua valde olavatis ; 



achaenii8 fascia prismaticia 2.7 nun. Longia deoraum modice august I 



i calloaia plu8 minusve curvatia in faciebu8 el in costis Bursum his- 

 pidalis ; pappi setia inaequalibus ca. 20 vix scabratis laete albia 

 rollam fere aequantibus. — < )n shaded cliffs of limerock, Sierra Madre, 

 above Monterey, Mexico, L000 in. alt., 16 July, 1906, C. G. Pringle, no. 

 l". 259 type, in hb. Gray). This species is closely related on the one 

 .'. chrysostylum Robinson and on the other to E. Pa/rryi Gray. 

 From the former it differs in its more slender freely branched Less pu 



in-, large bluntly toothed leaves and much Longer pedii 

 From /.'. Pa/rryi it differs in having much Larger Leaves (of which 

 in the uppermost are opposite), winged petioles, and smaller fewer 

 wered heads. 



Eupatorium thyrsiflorum (Greene) Robinson, n. comb. A 

 thyrsiflora Greene, Leafl. i. '.» (1903). The genus Kyrstenia Ni 

 does doI s.'i'in tn the writer in anyway satisfactorily separable from 

 oatorium. When all species are duly considered the two groups 

 appear to merge by imperceptible gradations. There seems, however, 

 t i be little doubt that Professor Greene's A . thyrsijlora is specifically 

 distincl and may be appropriately transferred to the older genus. 

 From the more typical material <>f the Bpecies, with leaves in var] 

 degi 'bed and somewhat narrowed at the base, the following plant 



may be varietally separated. 



holoclerum Robinson, n. var., foliia ovatia integris vel obsolete 

 rratis baai fere rotundatis. -Near the city of Durango, 

 Mexico, April to November, L896, Dr. E. Palmer, do. 755 (type, in hb. 

 Gray . Distributed as /.' occidentals, var. arizonicum Gray. 



Eupatorium triangulatum Alam, c.\ DC. Prod. v. 172(1836). After 



ireful examination of the types of this Bpecies in the DeCandollean 



herbarium at Geneva, and of /•,'. rubricauU link', at the Museum of 



Natural History at Paris] the writer can find no difference- of moment 



