EUPATORIUMS OF PERU. 69 



prove to be unappendaged, a matter not to be determined from a 

 photograph, the only source of information at hand. 



51. E. MiCROSTEMON Cass. Diet. XXV. 432 (1822); Robinson, Proc. 

 Am. Acad. Hv. 295, 340, 356 (1918). — Cuzco: in cultivated ground, 

 Santa Ana, alt. about 900 m.. Cook & Gilbert, no. 1544 (U. S.). A weed 

 widely distributed in the warmer parts of America. Not present in 

 the earlier collections from Peru and perhaps a recent introduction 

 in the country. 



52. E. viTALBAE DC. Prod. V. 163 (1836); Bak. in Mart. Fl. Bras, 

 vi. pt. 2, 305 (1876), excl. syn. E. remotifolium DC. which is exceed- 

 ingly different. — Loreto: near Tarapoto, Spruce, no. 4106 (Gr.). 



53. E. IXCARUM Robinson. Smooth, but sticky, much branched 

 shrub ; leaves small, suborbicular, obtuse, shortly subcuneate at base, 

 denticulate, 3-nerved from the base, punctate; heads about 5-flow- 

 ered, short-pedicelled, racemosely disposed on the branchlets of the 

 panicle, about 6 mm. long; involucre subcylindric; scales about 

 3-seriate, oblong, rounded at the tip, obscurely 2-3-ribbed, thin, 

 subscarious brownish straw-colored, slightly puberulent; corollas 

 3.7 mm. long, glabrous; the proper tube slender, 1.7 mm. long, the 

 throat distinctly enlarged, cylindrical, 2 mm. long; anthers with an 

 ovate round-tipped membranaceous apical appendage; style-branches 

 filiform, recurved, rounded and perceptibly enlarged at the tip; 

 achenes dark-brown, 1.5 mm. long, tapering downward, somewhat 

 atomif erous on the faces ; pappus-bristles about 30, fulvous, attenuate, 

 3 mm. long, nearly smooth. — Mem. Gray Herb. i. 122 (1917). Bac- 

 charis microphylla DC. Prod. v. 406 (1836), not HBK. B. Candolleana 

 Steud. Nom. ed. 2, i. 177 (1840). Brickellia microphylla (DC.) 

 Hieron. in Engl. Bot. Jahrb. xxviii. 583 (1901), not Gray. — Peru 

 WITHOUT LOCALITY, Hacnke (DC, detail sk. Gr.). 



54. E. Weberbaueri Hieron. Round-branched shrub 1 m. high; 

 branches dark- velvety, leafy; internodes rarely exceeding 6 mm. 

 in length; leaves opposite, broadly ovate-oblong, obtusish or acutish, 

 cordate, nearly entire or slightly crenulate, feather-veined and reticu- 

 lated, above a little puberulent on the nerves, but soon glabrate and 

 somewhat shining, below shortly white- velvety, the largest 1.5 cm. 

 long, 1 cm. wide, on thickish petioles rarely more than 1.5 mm. long; 

 heads densely and cymosely paniculate, 7-8-flowered, on pubescent 

 pedicels (2-5 mm. long); scales of the 4-5-seriate involucre about 15, 

 obtusish or (the outer) acutish, 3-5-striate, scarious, ochraceous, 

 puberulent, deciduous; corollas dull-yellowish, turbinate-subcylindric, 

 gradually a little enlarged toward the summit, sprinkled with short- 



