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 £. quadrangulare it differs in its essentially terete 
stem ; from £7. populifolium (a species which should henceforth bear 
the name £. morifolium 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 £. aromatisans 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 ins 
being winged clear to the base, as is the case in #. aromatisans. 
Eupatorium Holwayanum, n. sp., herbaceum gracile erectum vel — 
decumbens subglabrum 3-5 dm. altum ; caulibus teretibus plus minusve — 
purpurascentibus striatulis obscurissime puberulis foliosis gracilibus- Z 
haud 2 mm. diametro ; foliis ternis vel oppositis vel praecipue in ais ; 
superiore caulis alternis ovatis vel rl 
1.5-2 em. 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 ascandeniid 
divergentibus saepius 1-5-capituliferis ; capitulis 9 mm. diametro ca 
60-floris; involucri squamis valde inaequalibus lineari- lanceolatis 
pluriseriatim imbricatis attenuatis acutissimis striatis viridibus 
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 fascecossia 
mm. longis in angulis scabratis; pappi setis ca. 20 albis tenuissit 
scabratis. —Dry banks, Sierra de San Felipe, alt. 2150 m., 17 Nov. 
1894, C. G. Pringle, n. 5683 (hb. Gray), 14 Nov. 1903, Z. D. agi 
way, n. 5418 (hb. Gray). This plant was at first referred to E. triner 
vium Sch. Bip., to which it has considerable similarity. It may ? 
readily distinguished, however, by its much smaller leaves of an ov 
or thombie form, and by the lack of pubescence regularly found 
E. trinervium. a 
EvPatorIuM LEPTOPHYLLUM DC. Prod. v. 176(1836). This species! 
long been misunderstood and neglected. It was originally descr? 
from material collected about Savannah, Georgia, by Herbemon’ Me 
was regarded by Torrey and Gray (Fl. ii. 83) as merely a smoe 
variety (their var. glabrum, lc.) of 2. foeniculaceum Willd. Dr. " 
man and Dr. Small in their floras of the Southern meme do 
ae 
