42 PROCEEDINGS OP THE AMERICAN ACADEMY. 



light colored, yellowish, highly polished and shining, half line or less in 

 diameter. — Collected by C G. Pringle in open glades, Sierra de San 

 Felipe, Oaxaca, altitude 8,000 feet, June, 1894, no. 4692. Habit of 

 Houstonia purpurea, var. teuuifolia. 



Eupatorium eriocarpum. Stem tall, 5 to 8 feet in height; 

 branches glabrate, angled, lucid, yellowish brown ; branchlets puberulent 

 but soon glabrate : leaves opposite, ovate or rhombic ovate, crenate- 

 serrate, acuminate to an obtusish apex, cuneate or rather abruptly con- 

 tracted at the mostly unequal-sided base, glabrous on both surfaces except 

 on the veins and at their axils, 2 to 3 inches in length, a third to half as 

 bi'oad, neither coriaceous nor rugose, scarcely paler beneath, pinnately 

 veined; petioles 2 to 3 lines long: thyrsoid inflorescences terminal on 

 the upper branchlets and together forming large ovate leafy panicles ; 

 slender peduncles and short pedicels often nodding, covered with fine 

 and somewhat sordid pubescence: heads mostly 5-flowered, 5 to 6 lines 

 in length : scales of the involucre ovate to ovate-oblong, obtuse, finely 

 striate, ciliolate, imbricated in 3 or 4 series : corolla-tube slender, 2^ 

 lines in length, larger at the base than at the summit, without any ap- 

 parent throat ; teeth very short : style branches dark colored, strongly 

 clavate : achenes turbinate, so densely covered with white woolly or silky 

 pubescence as to obscure their 5 angles, about 2 lines in length, narrowed 

 at the base to a glabrous callous and somewhat pungent lip; pappus- 

 bristles white, slightly exceeding the achene, about 50 in number. — 

 Collected by C. G. Pringle, in Tomellin Cafion, Oaxaca, altitude 3.000 

 feet, 22 December, 1894, no. 6112. 



Eupatorium rilpicola. Shrub, 5 to 10 feet in height: branchlets 

 reddish brown, terete, finely and densely f uscous-puberulent : leaves op- 

 posite, petiolate, ovate, acuminate, crenate-serrate, 3-nerved, rounded or 

 obtusish at the base, green and sparingly puberulent or glabrate above, 

 paler and grayish-tomentulose beneath, 14 to 18 lines long, 7 to 12 lines 

 broad; petioles reddish, puberulent, 3 lines long: inflorescences 6-10- 

 headed flat-topped umbelliform corymbs terminating short opposite lateral 

 and terminal branchlets (1 to 2 inches in length), and together forming 

 more or less elongated leafy panicles ; pedicels densely pubescent, ascend- 

 ing, 2 to 4 lines long, subtended at the base by very reduced leaves and 

 often bearing one or more short subulate bractlets : heads 3i to 4 lines in 

 height ; involucre relatively short, imbricated in about 2 series ; scales 10 

 to 15, subequal, 1^ lines in length, oblong, acutish, puberulent; flowers 

 about 16, purplish white: corolla 2i|-3 lines, gradually enlarged upward: 

 achenes linear, a little over a line in length, rather densely white-pubes- 



