KOBINSON. — STUDIES IN THE EUPATORIEAE. 43 



attenuatis ; pappi subsparsi setis tenuissimis albis. — Pansamala, Depart. 

 Alta Verapaz, Guatemala, June, 1886, alt. 1150 m., //. von Tuerckheim, 

 n. 928 (distrib. by J. D. Smith). This specimen was first sent out as 

 E. aromatisans DC. Its identification was then changed at the mis- 

 taken suggestion of the writer to E. nubigenum Benth. Compared at 

 the Royal Gardens of Kew with Hartweg's n. 587, the type of Ben- 

 tham's E. nubigenum, this plant proved to be distinct. E. nubigenum 

 has larger flowers, longer achenes, closely sessile heads, and strongly 

 angled branches. 



Eupatorium 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, PI. Wright, i. 85 (1852). Bulbostylis 2)endula DC. 

 Prod. v. 138 (1836). Eupatorium pendulum Schrad. Cat. Sem. Hort. 

 Goett. 1830, ace. to DC. 1. c. Although the specific name nutans is 

 earlier than pendulum, it is no longer applicable in Brickdlia owing to 

 the existence of the valid homonym B. nutans Robinson & Greenman, 

 Am. Jour. Sci. 1. 152 (1895). 



Eupatorium ovaliflorum Hook. »& Am. 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 hab- 

 itally similar species, it may be well to record the differences, which 

 were found on a comparison of authentic specimens in the herbarium 

 of the Royal Gardens at Kew. In E. ovalijiorum 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. In 

 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. 



Eupatorium Palmeri 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 distinct 

 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. 



Var. tonsum, n. var., foliis ovato-lanceolatis longissime attenuatis 

 utrinque glabris remote serrulatis vel integris ad 14 cm. longis ad 



