MONOGRAPH OF THE NORTH AND CENTRAL 
AMERICAN SPECIES OF THE GENUS 
SENECIO—PART II 
J. M. GREENMAN 
Curator of the Herbariwm of the Missouri Botanical Garden 
Associate Professor in the Henry Shaw School of Botany of 
Washington University 
Бест. 6. Aurer Rydb. 
86. Aunzi Rydb. Bull. Torr. Bot. Club 27:173. 1900; Greenm. 
Monogr. Senecio, I. Teil, 22, 23, 29, 30. 1901, and in Engl. Bot. 
Jahrb. 32:18, 19, 25, 26. 1902. 
Herbaceous perennials, glabrous or in the early stages 
floceose-tomentose and more or less glabrate except in the 
axils of the leaves and occasionally at the base of the stem; 
stems erect or ascending, 1 to 10 dm. high, one to several from 
a common base or rootstock; leaves variable, the lowermost 
petiolate, rotund-ovate, oblong-ovate, obovate to narrowly 
oblanceolate, entire, crenate or dentate to more or less lyrate; 
stem-leaves petiolate to sessile, pinnatisect to entire, usually 
reduced towards the eymose inflorescence; heads radiate or 
discoid; achenes glabrous or hirtellous along the angles. Sp. 
33—80 
KEY To THE SPECIES 
A. Stems 1 to 10 dm. high, ereet or nearly so, 
simple or branched; heads one to many, diseoid 
(except in S. pauciflorus var. fallax); achenes 
glabrous. 
a. Plants small, 1.5 dm. or less high; lower 
leaves subentire or i dentat 
a. Lower leaves subentire.............. 33. S. fedifolius 
B. Lower leaves dion CAR EET 34. S. Fernalds 
b. Plants larger, 1.5 to 10 dm. high; leaves 
thin in texture, the до erenate- dentate 
Issued July 7, 1916 
NoTE.—The present paper is continued from Ann. Mo. Bot. Gard. 2:573-626. 
1915. 
ANN. Mo. Вот. GARD., Vor. 3, 1916 (85) 
