GREENMAN. — NEW ANGIOSPERMS FROM MEXICO. 93 



Vernonia vernicosa, Klatt, var. comosa. Stem striate, densely 

 pubescent : leaves pubescent on both surfaces with subappressed-hirsute 

 hairs, somewhat ghibrate above: other characters of the species, — Costa 

 Rica. Buissons a Matamber pres Nicoya, January, 1900, Ad. Tonduz, 

 no. 13,007 (hb. Gr., and hb. Inst. Phys.-Geog. Cost. Ri.). 



Eupatoriastrum, n. gen. of Compositce (Ageratect). Heads homog- 

 araous, many-flowered. Involucre campanulate; bracts 2-3-seriate. 

 Receptacle convex, chaff-bearing throughout. Corollas equal, regular, 

 shallowly 5-toothed. Pappus of numerous minutely barbellate setae, 

 disposed in a single row. Achenes linear-oblong, o-angled. Leaves 

 opposite, petiolate, palmately nerved. Inflorescence in terminal leafy 

 panicles. 



E. Nelsonii. Stem striate, slightly puberulent, somewhat stramineous 

 in color ; leaves jDetiolate, remote, broadly ovate, 1 to 2 dm. or more 

 long, 4 to 16 cm. broad, 5-7-nerved from or just above the base, acute or 

 short-acuminate, denticulate to shallowly dentate, rounded at the base, 

 conspicuously netted-veined, sparingly pubescent with scattered crisp 

 hirsutish hairs on both surfaces; petioles 1 to 3 cm. long: heads 1 to 1.5 

 cm. high, on axillary pedunculate and terminal clusters forming a leafy 

 panicle : involucral scales lance-oblong, acute, externally pubescent : 

 receptacle chaffy throughout with narrow pales slightly broadened toward 

 the tip : corolla a little constricted above the slightly ampliated tube : 

 pappus about equalling the corolla : achenes hirtellous-jjuberulent along 

 the ano-les. — Mexico. State of Oaxaca : Santa Eflsenia, altitude 150 

 m., 18 July, 1895, K W. Nelson, no. 2827 (hb. Gr., and hb. U. S. Nat. 

 Mus.). 



In habit and in the character of the paleaceous receptacle this plant 

 resembles Schistocarpka, but the style-branches are distinctly those of the 

 subtribe Ageratece, and closely resemble the style-branches in Eupatorium 

 near which genus it is provisionally placed. 



Stevia collodes. Shrub: ultimate branches reddish, puberulent: 

 leaves linear, or linear-lanceolate, 1.5 to 3,5 cm. long, 1.5 to 3 mm. 

 broad, obtuse, entire, glabrous on both surfaces : inflorescence terminat- 

 ing the stems and branches in few-headed umbellate-cymes : heads about 

 12 mm. high : involucral scales linear, 8 to 9 mm. long, acuminate, acute, 

 obtusely keeled on the back and, as well as the leaves and young branches, 

 glandular- viscid : flowers much exceeding the involucre : pappus coroni- 

 form, consisting of minute scales : corolla white, or slightly reddish-tinged, 

 with a long slender glandular tube, and a rather deeply 5-lobed limb : 

 achenes about 4 mm. long, slightly puberulent along the angles, t— 



