ROBINSON. —- STUDIES IN THE EUPATORIEAE. 43 
attenuatis ; pappi subsparsi setis tenuissimis albis. — Pansamald, Depart. 
Alta Verapaz, Guatemala, June, 1886, alt. 1150 m., H. von Tuerckheim, 
n. 928 (distrib. by J. D. Smith). This specimen was first sent out as 
E. aromatisans DO. Its identification was then changed at the mis- 
taken suggestion of the writer to LZ. nubigenum Benth. Compared at 
the Royal Gardens of Kew with Hartweg’s n. 587, the type of Ben- 
tham’s 2. nubigenum, this plant proved to be distinct. E. nubigenum 
has larger flowers, longer achenes, closely sessile heads, and strongly 
angled branches. 
Lupatorium nutans HBK. Nov. Gen. et Spec. iv. 105 (1820). This 
name has been regarded as a somewhat doubtful synonym of Brick- 
ellia secunda Gray. The type, however, when examined at the her- 
barium of the Museum of Natural History in Paris, proved to be B. 
PENDULA Gray, Pl. Wright. i. 85 (1852). Bulbostylis pendula DC. 
Prod. v. 138 (1836). Hupatorium pendulum Schrad. Cat. Sem. Hort. 
Goett. 1830, acc. to DC. 1.¢. Although the specific name nutans is 
earlier than pendulum, it is no longer applicable in Brickellia owing to 
the existence of the valid homonym B. nutans Robinson & Greenman, 
Am. Jour. Sci. 1. 152 (1895). 
Evpatorium ovaLirLorum Hook. & Arn. Bot. Beech. 297 (1840). 
This species was long known to the writer from the original description 
only, and from the characters there given could not be positively dis- 
tinguished from the plant, also of western Mexico, later described as 
E. Bertholdii Sch. Bip. in Seem. Bot. Herald. 299 (1856). As others 
may encounter difficulty in separating these nearly related and ha 
itally similar species, it may be well to record the differences, which 
were found on a comparison of authentic specimens mn the herbarium 
of the Royal Gardens at Kew. In Z. ovaliflorum the leaves are per- 
manently tomentulose above as well as below and they are decidedly 
pale beneath ; the involucres are ovoid and 3.8 mm. in thickness. 
E. Bertholdii, on the other hand, the leaves are somewhat scabrous 
with scattered hairs above and green beneath; while the involucres 
are more narrowly ovoid, 2.3 mm. in thickness. _ 
Evparorium Patmert Gray, Proc. Am. Acad. xxi. 383 ( 1886). From 
the typical form of this species, which has its leaves grayish-tomentu- 
lose beneath and its involucral scales finely pubescent, the following 
smoothish caudate-attenuate leaved plant would appear quite disti 
were it not for the existence in western Mexico of some intermediate 
forms, which appear to show that the differences, although conspicuous, 
are by no means constant. ip : 
Var. tonsum, n. var., foliis ovato-lanceolatis longissime attenuatis 
utrinque glabris remote serrulatis vel integris ad 14 om. longis ad 
