OF ARTS AND SCIENCES. 171 
(in the Berlin Herbarium), but from a specimen collected by 
Schaffner in Orizaba, October, 1855. The latter plant was identi- 
fied with Ehrenberg’s by Schultz himself, who employed the ! sign 
to express special definiteness. Bilimek’s no. 576, Orizaba, May, 
1867, and Bourgeau’s 1703, Valley of Cordova, January, 1866, 
have been identified with this species by Dr. Gray. Mr. Pringle’s 
plants collected on ledges of the Tamasopo Cafion, November and 
December, 1890 (nos. 3649 and 3956), are also certainly to be re- 
ferred here, although the leaves are more deeply hastate. 
Evparortum ScuHarrneri, Schultz Bip. Root a cluster of 
thickened fibres: stems 2-3, terete, pubescent, tending to turn 
dark purple, a foot or two in height, sparingly branched: Jeaves 
opposite, petiolate, ovate, crenate-serrate, acutish, truncate at the 
base, subglabrous, 1} inches long, an inch wide: petioles 4~7 lines 
in length, the upper shorter: heads corymbose, pedicellate, about 
25-flowered, 14 lines long (somewhat immature): scales of the invo- 
lucre equal, obtusish or more or less pointed, thin, sub-transparent, 
but with 2-3 strong nerves in the middle near the base: achenes 
immature.— Description drawn from the type collected by Schaffner 
in Mexico near 8S. Angelos, 1855 (n. 28). In the Gray Herbarium 
the following specimens may be referred to this species: Schaffner’s 
no. 292 ex convalli San Luis Potosi, August, 1876; Parry and 
Palmer’s 345, from a similar locality, 1878; and Pringle’s 3662, 
Flor de Maria, Mexico, October, 1890. These specimens, which 
are more mature than the type, show the heads to be a trifle larger, 
the ripe achenes to be small, dark, scarcely contracted below, pu- 
berulent both on and between the angles. 
Evpatortum Lemont. Stoloniferous: stems subsimple or 
much branched, terete, dark purple, with close white pubescence: 
leaves all opposite, sessile, mostly elliptic or ovate-elliptic, obtus- 
ish, 10-14 lines long, about half as wide, crenate-serrate (some-_ 
times obsoletely so), glabrous above, sparingly pubescent upon the 
veins beneath: the lower leaves smaller, rounder; the uppermost 
more ovate and acute: heads 3} lines high, on peduncles half an_ 
inch in length: the sharply pointed nearly smooth scales of the 
involucre subequal: flowers rather numerous; corollas white; 
achenes somewhat puberulent.— First collected by Mr. J. G. Lem- 
mon in the Chiricahua Mountains of Southern Arizona, 1881 - : 
(n. 316 in part); then by Dr. Edward Palmer in Southwestern 
Chihuahua, August to November, 1885 (n. 332); and by Me 
Pringle on cool rocky slopes of the Sierra Madre, September, 1887 a f 
