1456 CONTEIBUTIOX? FROM THE ISTATIOXAL IIEEBAFJUM 



62. Eupatorium longifolium Robinson, Proc. Amer. Acad. 36: 480. 1901. 



San Luis Potosi and Veracruz; type from Tamasopo Canyon, San Luis Potosf. 



Suffruticose, 1 meter high; stems slender, terete, covered with fine dark spread- 

 ing pubescence; leaves opposrte, ovate, narrowed from near the base to a caudate- 

 attenuate tipj crenate-serrate at the sides, cordate at base, 3-nerved, thin, dark 

 green above, paler and slightly velvety beneath, 8 to 12 cm. long, 4 to 5 cm. wide; 

 petiole mostly 8 to 16 mm. long; heads 10 to 12-flowered, disposed in a large, 

 leafy-bracted, ovoid or pyramidal panicle; phyllaries linear-attenuate, 3 or 

 4-nerved, pubescent; corollas greenish white, often with a dull purple tinge. 



63. Eupatorium solidaginoides H. B. K. Nov. Gen. & Sp. 4: 126. 1820. 

 Eupatorium filicaule Schultz Bip.; A. Gray, Proc. Amer. Acad. 21; 384. 1886. 

 Eupatorium stipuliferum Rusby, Mem. Torrey Club 4; 210. 1895. 

 Ophryosporus solidaginoides Hieron. Bot. Jahrb. Engler 29: 4. 1900. 



San Luis Potosf, Veracruz, Oaxaca, and Chiapas. Widely distributed in 

 Central and South America; type collected between Ticsan and Alausi, Ecuador. 



A slender, wholly herbaceous or slightly lignescent calciphile with some 

 tendency to climb; leaves opposite, slender-petioled, ovate, caudate-acuminate, 

 the cauline open-cordate and more or less hastate at base, dentate, membran- 

 aceous, 5 to 12 cm. long, half as wide, puberulent to subtomentellous on the 

 nerves beneath; heads 10 to 15-flowored, slender-pediceled and subracemose on 

 the spreading branches of a large leafy-bracted panicle; phyllaries lanceolate, 

 acute, loosely imbricate, usually purple-tinged. 



63a. Eupatorium solidaginoides var. armourii Robinson, Proc. Amer. 

 Acad. 55: 32. 1919. 



Chiapas; known only from the type collection secured at Palenque. 



Leaves narrowly triangular, much more decidedly hastate and more deeply 

 crenate-toothed than in the typical form. 



A marked variation but inseparable by trustworthy characters. 



64. Eupatorium pseudoperfoliatum Schultz Bip.; Klatt, Leopoldina 20: 

 75. 1884. 



Veracruz; known only from the original collection made at Consoquitla. 



A slender shrub with virgate stems; leaves opposite, ovate, acuminate, crenate- 

 dentate, cordate, so short-petioled as to appear sessile and stem-clasping, mem- 

 branaceous, 6 to 10 cm. long, 4 to 5 cm. wide, brown-tomentellous on both 

 surfaces; heads about 12 to 14-flowered, shortly pediceled at tips of the branches 

 of a loose pyramidal leafy-bracted panicle; phyllaries lanceolate, attenuate, 

 2 or 3-ribbed, brownish-puberulent. 



65. Eupatorium leucoderme Robinson, Proc. Amer. Acad. 41: 274. 1905. 

 Known only from the original collection obtained at Chuta, presumably in 



Guerrero, altitude 25 meters, in sandy soil. 



Shrub with arcuate terete cream-white branches; leaves oblong-lanceolate, 

 caudate-acuminate, serrate to subentire, rounded at base, thin, somewhat 

 puberulent, 5 to 7 cm. long, 2 to 2.5 cm. wide; petiole about 6 mm. long; heads 

 about 6-flowered, in dense, ovoid, lateral or terminal, short-peduncled thyrses; 

 phyllaries lance-linear, less than half as long as the florets; corollas white» 

 slender-tubulate . 



66. Eupatorium albicaule Schultz Bip.; Hemsl. Biol. Centr. Amer. Bot. 

 2: 92. 1881, hyponym; Klatt, Leopoldina 20: 89. 1884. 



Eupatorium drepanophyllum Klatt, Ann. Naturhist. Hofmus. Wien. 9: 356. 



1894. 

 Veracruz, San Luis Potosi, and Yucatan; type from Papantla, Veracruz. 

 Tall shrub 3 to 9 meters high; branches flexuous or arcuate, terete, cream- 

 white; branchlets sparingly puberulent to fulvous-tomentellous; leaves smooth. 



