STANDLEY TREES AND SHRUBS OF MEXICO 1463 



94. Eupatorium calophyllum (Greene) Robinson, Contr. Gray Herb, n ser 

 75: 5. 1925. 



Kyrstenia calophylla Greene, Leaflets 1: 11. 1903. 



Coahuila, San Luis Potosi, and Hidalgo; type from Saltillo. 



A low calciphile shrub 15 to 30 cm. high; stem decumbent or even prostrate and 

 subrepent, sending up erect branches; leaves opposite, suborbicular, varying to 

 ovoid or broadly elliptical, about 1.5 to 2 cm. in diameter, crenate, thick, coriace- 

 ous, concolorous, minutely scrobiculate beneath, the glandular punctation tend- 

 ing to follow the yellowish green network of fine veinlets; petiole 3 to 6 mm. long; 

 corymbs mostly 3 to 5 cm. wide; heads about 12-flowered; phyllaries oblong, acute, 

 often purple-tinged, scarcely half as long as the florets; corollas purple. 



95. Eupatorium calaminthaefolium H. B. K. Nov. Gen. & Sp. 4: 129. 1820. 

 Coahuila, San Luis Potosi, Guanajuato, and Hidalgo; type from Santa Rosa 



de la Sierra, near Guanajuato. 



Habitally similar to the preceding, but taller; leaves membranaceous or at 

 most chartaceous, sparingly puberulent, not scrobiculate, the glandular dots on 

 the surface of the areolae rather than on the netted veinlets; phyllaries oblong, 

 mostly obtuse. 



In the past this species, ver}' broadly interpreted, has been made to include 

 several now pretty readily distinguishable species. 



96. Eupatorium glaucum Schultz Bip.; Klatt, Leopoldina 20: 89. 1884. 

 Not E. glaucum Schultz Bip.; A. Gray in Hemsl. Biol. Centr. Amer. Bot. 2: 

 95. 1881. See Robinson, Proc. Amer. Acad. 35: 333. 1900. 



Eupatorium orizabae Schultz Bip.; Klatt, Leopoldina 20: 90. 1884. 



Veracruz and Oaxaca; type from Pelado. 



Low sprawling many-branched alpine undershrub, sordid-pubescent and glan- 

 dular; leaves opposite (the uppermost sometimes ternate or scattered and alter- 

 nate), suVjsessile, elliptic-oblong, thick, coriaceous, l(or 3)-nerved, revolute at 

 margin, 1 to 1.6 cm. long, 3 to 7 mm. wide; corymbs few-headed, 3 to 4 cm. wide; 

 phyllaries oblong, mostly obtuse, nerveless, purple-tinged; corollas purple. 



97. Eupatorium rhodopoduru Robinson, Contr. Gray Herb. n. ser. 75: 12. 

 1925. 



San Luis Potosi; type from Minas de San Rafael. 



Shrub 40 cm. or more in height, sparingly dark-villous on the younger parts, 

 otherwise glabrous; stems terete and branches nearly so; leaves opposite, sub- 

 sessile, broadly ovate to ovate-oblong, obtuse to barely acute, rounded to sub- 

 cordate at base, slightly undulate-dentate, thick, coriaceous, 2 to 3 cm. long, 

 1.4 to 2.5 cm. wide, green and glabrous on both surfaces, not punctate, the very 

 short petiole thick, often reddish purple; corymbs terminal, 3 to 6 cm. wide; 

 heads long-pediceled; phyllaries lance-oblong, acute, ciliate, often purple-tinged; 

 pappus bright rose-color. 



98. Eupatorium mygindaefolium A. Gray, Proc. Amer. Acad. 16: 101. 

 1880. 



Bigelovia oppositifolia A. Gray, Proc. Amer. Acad. 15: 32. 1879. Not 

 Eupatorium oppositifolium Hoffmannsegg. 



San Luis Potosi; type from ravine in cool mountains near San Miguel. 



Low, much branching, sprawling, vernicose undershrub; stems nodose, fuscous; 

 leaves oblong, acute or acutish at each end, few-toothed above the middle, about 

 14 mm. long, 6 mm. wide, coriaceous, green and often gummy on both surfaces; 

 heads subsolitarj' at ends of the branches, at maturity 12 to 14 mm. long, sur- 

 rounded by foliaceous bracts. . 



