28 ROBINSON 
characters in the light of what apparently was a portion of the original 
material even if not absolutely authentic. 
A smailler-headed variety has been described by Hieronymus, 
namely var. MICROCEPHALUS Hieron. in Engl. Bot. Jahrb. xxii. 708 
(1897) as microcephala; Ktze. Rev. Gen. iii. 165 (1898); Robinson, 
Proc. Am. Acad. xlii 24 (1906).—Bottv1a: Challapass, Cochabamba, 
alt. about 4000 m., Kuntze (N. Y.). 
EvupatoriuM BILLBERGIANUM AND ITs ALLIES.—A small group of 
Eupatoriums belonging to the ever perplexing Sect. Cylindrocephala 
has given the writer considerable difficulty, but now seems to resolve 
itself into elements which may be pretty clearly defined. It consists 
of four nearly related slightly shrubby climbers in which the heads 
are glomerate in a pyramidal panicle (not at all cymose or corym- 
bose) and the leaves are from typically ovate to ovate-oblong or 
elliptical, entire or undulate to remotely mucronulate-denticulate, 
with no tendency to hastate form or toothing. As thus far known 
these species have wholly distinct ranges, one being from Panama 
and Guatemala, another from Costa Rica, the third from Nicaragua, 
and the fourth, remote from the others, in Ecuador. They are of 
very similar habit and at first examination suggested probable varia- 
tions of a common specific type. However, they appear to maintain 
the following distinctions. 
a. Leaves elliptical-ovate, shortly and bluntly pointed, slightly me 
or entire, no nitely pellucid-punctate; Ecuador..... . BE. E 
a. Leaves — gradua ily acuminate or ae Spend agen * pointed, ee 
spicuously but definitely glandular-toot 
b. are distinctly (under lens) sath aich-craesibal a 
bove base and with tonecioclle and su eine 
(st MIGR 6G Gina eee ee E. lau aia 
c. Inflorescence jig sone eae to sparingly ade pone near t : 
aeiye leaves tending to be lucid, pinnate-veined, without inoxe 
conspicu cole cross-veining, the pencae? warn pee mor 
definitely of the dot and dash type; Nicaragua. .3. E.n : st 
b. Leaves My Bhat tely pone pan tae with a subjranslucent - 
inlets often discontinuous; inflorescence essentially on 
brous; - Pies and -Guatemals. 6.005 6 ges 2s 4. E. Billbergian 
1. E. Eacersm Hieron. in Engl. Bot. Jahrb. xxviii. 566 (1901). 
—Ecuapor: Prov. Manabi, near the Hacienda El Recreo, Eggers, 
no. 15,414 (Berl., phot. and fragm. Gr.). Since treating this species, 
Proe. Am. Acad. liv. 346 (1918), the writer has seen a second gore 
men which seems referable to it, namely Eggers, no. 195, 671 ~s 
also from Ecuador though without stated locality. It is said to 

