40 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Gray). This perplexing plant has several times been referred to the 

 present writer, who may well be responsible for some of the several 

 names under which it has passed. Renewed study of it shows that it 

 possesses distinctions which appear to separate it from any described 

 species. From E. quadrangulare it differs in its essentially terete 

 stem ; from E. liopulifoliiim (a species which should henceforth bear 

 the name^. morifoUum Mill.), it may be readily distinguished by its 

 essentially membranaceous leaves of different dentation, and by its 

 pubescent achenes, as well as by its half- winged petioles. Its nearest 

 affinity is doubtless, as pointed out by Dr. Millspaugh, with the West 

 Indian E. aromatlsans DC, yet it cannot be satisfactorily placed in 

 that species, as the leaves are much thinner, the upper ones crenate- 

 dentate, not serrate, and the petioles only partially winged instead of 

 being winged clear to the base, as is the case in E. aromatisans. 



Eupatorium Holwayanum, n. sp., herbaceum gracile erectum vel 

 decumbens subgiabrum 3-5 dm. altum ; caulibus teretibus plus minusve 

 purpurascentibus striatulis obscurissime puberulis foliosis gracilibus 

 hand 2 mm. diametro ; foliis ternis vel oppositis vel praecipue in parte 

 superiore caulis alternis ovatis vel rhomboideis acutiusculis pauciserratis 

 1.5-2 cm. longis 7-10 mm. latis 3-nerviis utrinque glabris viridibus 

 basi cuneatis brevissime petiolatis; panicula laxe ramosa basi plus 

 minusve folioso-bracteata, ramis gracilibus purpureis ascendenti- 

 divergentibus saepius 1-5-capituliferis ; capitulis 9 mm. diametro ca. 

 60-floris ; involucri squamis valde inaequalibus lineari-lanceolatis 

 pluriseriatim imbricatis attenuatis acutissimis striatis viridibus vel 

 purpurascentibus ; corollis albis 3.3 mm. longis tubulosis, tubo proprio 

 brevissimo, faucibus anguste tubulosis multo longioribus glabris, denti- 

 bus limbi 5 externe puberulis ; achaeniis 5-angulatis fuscescentibus 1.7 

 mm. longis in angulis scabratis ; pappi setis ca. 20 albis tenuissimis 

 scabratis. — Dry banks. Sierra de San Fehpe, alt. 2150 m., 17 Nov. 

 1894, C. G. Prmgle, n. 5683 (hb. Gray), 14 Nov. 1903, E. D. W. Hol- 

 ivay, n. 5418 (hb. Gray). This plant was at first referred to E. triner- 

 vium Sch. Bip., to which it has considerable similarity. It may be 

 readily distinguished, however, by its much smaller leaves of an ovate 

 or rhombic form, and by the lack of pubescence regularly found in 

 E. trinervium. 



Eupatorium leptophyllumDC. Prod. v. 176(1836). This species has 

 long been misunderstood and neglected. It was originally described 

 from material collected about Savannah, Georgia, by Herbemont, and 

 was regarded by Torrey and Gray (Fl. ii. 83) as merely a smoothish 

 variety (their var. glahrum, 1. c.) of E. foenimlaceum Willd. Dr. Chap- 

 man and Dr. Small in their floras of the Southern States do not 



