26 ROBINSON 
formerly misled by a supposed authentic fragment in the herba- 
rium of Dr. Klatt exhibiting a well-formed apical anther-appendage, 
but he has since seen reason to doubt the authenticity of this material 
and after a re-examination of type-photographs and other available 
sources of information now feels that E. chilca is clearly an Ophry- 
osporus as pointed out by Prof. Hieronymus in Engl. Bot. Jahrb. 
xxli 706 (1897). 
So closely related are these four species, not merely among them- 
selves but to Ophryosporus origanoides (Meyen & Walp.) Hieron. 
and OQ. venosissimus (Rusby) Robinson, that intergradation is by no 
means unlikely and some reduction may well prove needful. It may 
be worth while, however, to place on record in key form the most 
distinctive (although manifestly weak) characters by which these 
species may be separated. 
d b. 
es 3-4 cm. long, the teeth sharp and widely spreading, Nap 
chilca. 
WtOd. Samieeth Pape es ee ei erhide 1.. 0, 
b. Leaves 5-7.5 em. long, serrate, the veins prominulent-reticulate be- 
Gig PIO ey oe ne eS O. venosissimus 
c. Stem-leaves lanceolate, attenuate, rather firm y membranaceous, 
about 4-4.5 em. long and one-third as wide, mostly 11—14-toothed 
GNRR MOG Eas pie eas Cac 3. O. eleutherantherus. 
ce. Stem-leaves ovate-lanceolate, acute or acuminate, limp-membrana- 
ceous, about 1.5-2.5 cm. long, usually over two-fifths as wide, 
mostly 5-9-toothed on eachside................. 40. 
1. O. catuca (HBK.) Hieron. in Engl. Bot. Jahrb. 706 (1897). 
Eupatorium chilea HBK. Nov. Gen. et Spec. iv. 125 (1820); Robin- 
son, Proc. Am. Acad. lv. 74 (1919). E. affine HBK. 1. c. 126 (1820); 
Robinson, 1. c. 75 (1919), a larger-leaved form but apparently not 
otherwise different—Prru: Cajamarca at the base of Mt. Sta. 
Polonia, Humboldt & Bonpland, no. 3682 (Par., phot. Gr.; Berl., 
phot. Gr.); also a specimen of FE. affine HBK. (Par., phot. Gr.) 
supposed to have been collected at the same locality; shrub, 2 m. 
high, at Chiquan, Prov. Cajatambo, Dept. Ancachs, alt. 3000-3300 
m., Weberbauer, no. 2832 (Berl., fragm. Gr.). 
This imperfectly known species was described as glabrous but 
viscid. Photographs of the original material show clearly that the 
stems are in fact smoother and more distinctly striate than in other 
members of the group. S 
2.0. Sieeueures (Rusby) Robinson, Proc. Am. Acad. xiii 24 
(1906). E. venosissimum Rusby, Mem. Torr. Bot. Club, vi. 57 
(1896).—Bonivia: Cochabamba, Bang, no. 1113 (Gr., Mo.). This 
