478 PROCEEDINGS OF THE AMERICAN ACADEMY. 
thin, harsh and slightly scabrous upon both surfaces, 4 to 5 cm. long, 
half as broad, minutely punctate, slightly pubescent upon the nerves; 
slender fuscous-pubescent petioles 1 em. long: heads in rounded axillary 
and terminal thyrsoid panicles; pedicels filiform, flexuous, covered with 
fine spreading purple pubescence ; bracts and bractlets subulate, minute; 
involucre turbinate, the lower much reduced scales somewhat decurrent 
upon the pedicels, the inner scales oblanceolate-oblong, acuminate, erose, 
puberulent or granular dorsally, thin, striate, often purplish-tinged ; 
- flowers about 8: corolla tubular, slightly and gradually narrowed from 
the summit to the base, essentially glabrous, slightly exceeding the bar- 
bellate pappus: achenes dark-colored, upwardly hispid upon the prominent 
angles. — H. ageratifolium, var. purpureum, Coulter, Bot. Gaz. xvi. 98 
(1891). — Collected by H. von Tiirckheim in Coban, Depart. Alta Vera 
Paz, Guatemala, altitude 1,415 m., March, 1887, no. 52 of Mr. John 
Donnell Smith’s sets. This plant differs from 2. ageratifolium, DC,, 
so greatly in pubescence, leaf-texture, involucre, and inflorescence that 
intergradation does not appear likely. 
Evpatorium pasycarpum, Gray, Proc. Am. Acad. xxii. 420 (1886). 
Add syn. Stevia rapunculoides, DC. Prodr. v. 124 (1836). 
Eupatorium dryophilum. Perennial from a_thickish branched 
caudex; stems several, erect, 5 to 7 dm. high, terete, finely striate, 
puberulent or tomentulose, slightly scabrous, not glandular, reddish 
brown, branched at the summit: leaves opposite or ternate, sessile, ovate 
or oval, the lowest obtuse, the upper acute, all 3-nerved, shallowly few- 
toothed, thickish, reticulate-veiny, very scabrous upon both surfaces, 
entirely destitute of glands or resinous particles: heads large, LA 
in diameter, slender-pedicelled, erect; involucral scales thin, gree), oval 
to oblong, rounded at the apex, 4-5-seriate, striate, glabrous, mealy not 
viscid: corollas purple, glabrous except at the short-toothed limb: pappas 
bristles sordid, barbellate, very unequal; achenes dark olive, ears: 
long, granular. — Collected by Dr. Edward Palmer, on the Rio Blanco, 
Jalisco, October, 1886, no. 651, and by C. G. Pringle with oaks and 
pines on rocky hills near Guadalajara, nos. 2171, 2323. This species 1 
near Z. pleianthum, Robinson, but differs from it in the absence of resi 
ous globules upon the leaves and the presence of mealiness upo? aig 
involucre which is not viscid, also in its shorter darker achenes with fine 
transverse striation. 
Evratorium Hyssorinum, Gray, Proc. Am. Acad. xv. 28 (1880). 
Add syn. EZ. koelliaefolium, Greene, Pittonia, iii. 31 (1896). Identity 
exact. 
