ROBINSON. — MEXICAN PLANTS. 339 
5 mm. high, about 16-flowered, borne in small round-topped corymbs at 
the ends of the opposite branches, also forming a larger dense terminal 
corymb; pedicels 4 mm. long; involucral bracts subequal, oblong, 
obtuse, pale green, striate, 3 mm. long: corollas nearly white, 2.5 mm 
long, the well-marked throat nearly as long as the proper tube: pappus 
(not copious) about equalling the corolla: achenes black, 1.2 mm. long, 
minutely roughened on the angles. — Collected by C. G. Pringle on 
shaded cliffs of the Sierra de Tepoxtlan, 24 km. northeast of Cuernavaca, 
Mexico, altitude 2,300 m., 7 February, 1899, no. 8029. 
E. platyphyllum. Shrubs with stems pithy, 6-angled, stoutish but 
flexuous as if scandent, at first sordid tomentulose-pulverulent, at length 
glabrate ; internodes rather long : leaves opposite, 1.2 to 1.8 dm. long, the 
largest 2.2 dm. broad, shallowly 3-lobed, acuminate, rounded below to a 
very shortly cuneate base, thin, green and glabrous or nearly so on each 
surface, 3-nerved from the base, coarsely reticulate-veined, the veins pale 
and slightly prominulous beneath; lobes acuminate, cuspidate-denticulate ; 
petioles slender, 3 cm. long: heads large, numerous, 60-75-flowered, 
aggregated at the ends of the slender ascending branches of a broad 
somewhat pyramidal panicle; pedicels filiform, about 1 em. long; in- 
volucre campanulate, 1 em. high, 1.3 cm. in diameter ; scales _pluriseri- 
ate, regularly but loosely imbricated, very unequal in length, stramineous, 
striate, scarious and erose near the rounded tips: corollas 6 mm. long, 
probably white, very slender, without distinctly enlarged throat, equalled 
by the copious bright white pappus: achenes glabrous, 2 mm. long. — 
Collected by E. W. Nelson, near Chicharras, Chiapas, Mexico, altitude 
900 to 1,800 m., 6 February, 1896, no. 3765; also by E. A. Goldman 
at oo Peckias no. 78. Types in heli Gray and herb. U. S. 
Nat. Mus 
E. Sievicn. Sch. Bip. in Rob. & Sea. Proc. Am. Acad. xxviii. 
108 (1893). Add syn. EZ. abronium, Klatt, Ann. k. k. Naturh. Hofmus. 
Wien, ix. 355 (1894). 
E. scabrellum. Stems angled and furrowed above, finely grayish 
pubescent or tomentulose: leaves subalternate (at least the upper ones), 
petiolate, ovate, scarcely acute, subcordate or rounded at the base, 
crenate-denticulate, 5 to 16 cm. long, 3 to 12 em. broad, thin but of 
harsh texture, green upon both siden. not paler beneath, glabrous to the 
naked eye, but somewhat scabrous and under a lens puberulent, palmately 
3-nerved somewhat above the pinnately several-nerved base: inflores- 
cence an alternate-branched many-headed racemose panicle, its lower 
branches (subtended by leafy bracts) 1.2 dm. long, naked below, 
