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Missouri Botanical Garden 
Vor. 4 NOVEMBER, 1917 No. 4 
TWO EXOTIC COMPOSITAE IN NORTH AMERICA 
J. M. GREENMAN 
Curator of the Herbarium of the Missouri Botanical Garden 
Professor in the Henry Shaw School of Botany of 
Washington University 
I. SENECIO CANABINAEFOLIUS Hook. & ARN. IN FLORIDA 
Early in the nineties Professor Charles Mohr collected a 
plant on ballast at Hunter’s Wharf, presumably at Pensacola, 
Florida, which he referred to Senecio without specific deter- 
mination. The specimen, now in the United States National 
Herbarium, is a rather imperfect one, although it shows a 
complete inflorescence, the upper portion of the stem, and a 
few fragmentary leaves. On the label is written ‘‘a fine plant 
four to five feet high, June, 1893-1894." Another specimen, 
also in the National Herbarium and evidently conspecific with 
the above, was collected by Professor Mohr and definitely 
labeled ‘‘ballast ground, Pensacola, May 15th,’’ but unfor- 
tunately the portion of the label indicating the year has been 
eut off. However, the second specimen shows in addition to 
the entire inflorescence well-preserved upper stem-leaves; 
thus the two together possess all the essential characters for 
satisfactory specific identification. A careful study of these 
specimens has been made, and they agree in every detail with 
the original description of Senecio canabinaefolius Hook. & 
Arn., a South American species from the marshes of La Plata, 
near Buenos Aires, which may be briefly redescribed as 
follows: 
Senecio canabinaefolius Hook. & Arn. in Hooker’s Jour. 
Bot. 3: 341. 1841. 
ANN. Mo. Вот. GARD., VOL. 4, 1917 (289) 
