1460 CONTRIBUTIONS FROM THE NATIONAL, HERBARIUM 



81. Eupatorium. espinosarum A. Gray, Proc. Arner. Acad. 15: 28. 1879. 

 Eupatorium spiraeaefolium Schultz Bip.; Hemsl. Biol. Centr. Amer. Bot. 2: 



101. 1881, nomen nudum. 



Kyrstenia espinosarum Greene, Leaflets 1: 9. 1903. 



Eupatorium spiraeifolium Schultz Bip.; Loesener, Bull. Herb. Boiss. 3: 624. 

 1895. 



Shrub 1 to 1.5 meters high, always somewhat vernicose and viscid, especially 

 on the involucres, the older branches often blackened; leaves opposite, petiolate, 

 firmly membranaceous to subcoriaceous, chiefly triangular-ovate but varying to 

 rhombic-ovate, obtuse to more often acute or acuminate, mostly subtruncate at 

 base, 2 to 3.8 cm. long, 1 to 2.5 cm. wide, bright green above, scarcely paler and 

 finely dark-reticulate beneath; petiole 5 (to 10) mm. long; corymbs many, 4 to 5 

 cm. wide, convex; heads about 13-flowered; phyllaries oblong to elliptic, gummy 

 and often yellowish. 



81a. Eupatorium espinosarum var. doratophyllum Robinson, Contr. Gray 

 Herb. n. ser. 75: 6. 1925. 



Eupatorium robinsonianum Greene, Erythea 1: 150. 1893. 



Jalisco and Hidalgo; type from can\'on walls near Lake Chapala. 



A slightly gummy shrub differing from the typical form in having lanceolate 

 rather than ovate leaves 2.5 to 3 cm. long and 9 to 13 mm. wide, rounded rather 

 than subtruncate at base. 



82. Eupatorium hebes Robinson, Contr. Gray Herb. n. ser. 75: 7. 1925. 

 Southern Mexico, presumably Veracruz; type from " Mecatlan, St. Andres." 

 Shrub assuming (at least in dried specimens) a dull yellowish brown color; 



subterete branches and hexagonal branchlets as well as pedicels and phyllaries 

 closely beset with short spreading gland-tipped bristles; leaves opposite, petio- 

 late, broadly oval, rounded at tip, subentire, scarcely pointed at the base, 2 to 3.3 

 cm. long, nearly as wide; corymbs 6 to 9 cm. in diameter; phjllaries lanceolate, 

 acute, dorsally glandular-puberulent. 



82a. Eupatoriura hebes var. rasum Robinson, Contr. Gray Herb. n. ser. 75: 

 8. 1925. 



With the typical variety. 



Differing in having the branches somewhat more definitely angled and, as well 

 as the branchlets, pedicels, phyllaries, etc., quite free from the spreading bristles 

 characteristic of the typical variety. 



83. Eupatorium havanense H. B. K. Nov. Gen. & Sp. 4: 128. 1820. 

 Eupatorium leiophyllum Less. Linnaea 6: 402. 1831. 

 Eupatorium berlandieri DC. Prodr. 5: 167. 1836. 



Eupatorium ageratijolium, DC. Prodr. 5: 173. 1836. 



Eupatorium ageratijolium 8. ? mexicanum DC. Prodr. 5: 173. 1836. 



Eupatorium ageratijolium 13. texense Torr. & Gray, Fl. N. Amer. 2: 90. 1841. 



Bulbostylis deltoides Buckley, Proc. Acad. Philad. 1861: 456. 1861. 



Eupatorium texense Rydb. Fl. Colo. 335. 1906. 



Coahuila, Nuevo Leon, Tamaulipas, San Luis Potosi, and Veracruz. Te.xas, 

 Cuba, and Bahamas. 



A neat shrub 1 to 2 meters high, smoothish to more often puberulent; stems 

 and ascending branches terete; leaves opposite, petiolate, of firm texture and 

 subcoriaceous, deltoid- to rhombic-ovate, 3-nerved from base, acute, coarsely 

 crenate-dentate to obscurely serrate or subentire, 3 to 5 (or 8) cm. long, 1.2 to 3 

 (or 4) cm. wide; corymbs convex; heads at full maturity about 1 cm. long, well 

 pediceled; phyllaries green to purplish, linear, acute; pappus white to roseate; 

 corollas white or nearly so. 



An abundant species, somewhat variable as to leaf form, dentation, degree of 

 pubescence, etc., j^et without well-marked varieties. 



