36 PROCEEDINGS OF THE AMERICAN ACADEMY. 
rameum molliter hirsutum, pilis longis patentibus plus minusve monili- 
formibus albis viscidulis inaequalibus ; foliis oppositis deltoideis vel 
ovato-deltoideis longe petiolatis late cordatis grosse duplicateque cren- 
ato-dentatis tenuibus utrinque praesertim subtus in nervis pubescenti- 
bus, limbo 11-12 em. longo 8-10 cm. lato, petiolo sursum alato ca. 7 cm. 
longo hirsuto ; panicula oppositiramea ; capitulis ca. 11-floris 10-11 mm. 
longis 4-5 mm. diametro ; pedicellis gracilibus rectis valde inaequalibus 
2-12 mm. longis ; involucri squamis lanceolatis attenuatis peracutis 
3—4-serlatis valde imbricatis viridibus albo-nerviis hispidulis adpressis ; 
corollis angustissime tubulosis 3.5 mm. longis viridiscenti-albidis, 
faucibus vix ullis; dentibus limbi brevissimis erectis ; styli ramis valde 
exsertis aurantiacis vel maturitate brunnescentibus valde clavatis ; 
achaeniis fuscis prismaticis 2.7 mm. longis deorsum modice angustatis 
basi callosis plus minusve curvatis in faciebus et in costis sursum his- 
pidulis ; pappi setis inaequalibus ca. 20 vix scabratis laete albis co- 
rollam fere aequantibus. — On shaded cliffs of limerock, Sierra Madre, 
above Monterey, Mexico, 1000 m. alt., 16 July, 1906, C. G. Pringle, no. 
10,259 (type, in hb. Gray). This species is closely related on the one 
hand to #. chrysostylum Robinson and on the other to E. Parryi Gray. 
From the former it differs in its more slender freely branched less pu- 
bescent stems, large bluntly toothed leaves and much longer pedicels. 
From E. Parryi it differs in having much larger leaves (of which 
even the uppermost are opposite), winged petioles, and smaller fewer- 
flowered heads. : 
Eupatorium thyrsifiorum (Greene) Robinson, n. comb. Kyrstenia 
thyrsiflora Greene, Leafl. i. 9 (1903). The genus Kyrstenia Neck. 
does not seem to the writer in any way satisfactorily separable from 
Eupatorium. When all species are duly considered the two groups 
appear to merge by imperceptible gradations. There seems, however, 
to be little doubt that Professor Greene’s K. thyrsiflora is specifically 
distinct and may be appropriately transferred to the older genus. 
From the more typical material of the species, with leaves in varying 
degree toothed and somewhat narrowed at the base, the following plant 
may be varietally separated. - 
Var. holoclerum Robinson, n. var., foliis ovatis integris vel obsolete 
crenato-serratis basi fere rotundatis.— Near the city of Durang® 
Mexico, April to November, 1896, Dr. E. Palmer, no. 755 (type, in hb. 
Gray). Distributed as Z. occidentale, var. arizonicum Gray. 
Eupatorium triangulatum Alam. ex DC. Prod. v. 172 (1836). After 
a careful examination of the types of this species in the DeCandolleat 2 
herbarium at Geneva, and of E. rubricaule HBK. at the Museum © 
\ 
_ Natural History at Paris, the writer can find no differences of moment 
