MONOGRAPH OF THE NORTH AND CENTRAL 
AMERICAN e OF THE GENUS 
SENECIO—PART II! 
. GREENMAN 
Curator of the ла of the Missouri Botanical Garden 
Professor in a ae Shaw сета of Botany of 
ington Universi 
бест. 8. Томкхтові Rydb. 
88. Tomenrost Rydb. Bull. Torr. Bot. Club 27 : 184. 1900, 
in major part; Greenm. Monogr. Senecio, I. Teil, 22, 24, 29. 
1901, and in Engl. Bot. Jahrb. 32 : 18, 20, 25. 1902. 
Perennial and usually cespitose herbs with erect or ascend- 
ing stems, densely and permanently white-tomentose through- 
‘out, or tomentose in the early stages and more or less glabrate 
in age; inflorescence a few to many-headed corymbose cyme; 
heads radiate or discoid; achenes glabrous or hirtellous. Sp. 
KEY To THE SPECIES 
A. Plants at first tomentose, soon more or less сез 
espeeially on the upper eec owe inflorescen 
eiue headed; heads 8 to 12 mm. high. 
a. све leaves ovate, 2 to 5.5 em. broad, often sub- 
йа сз сз or EU атта 97. В. arizonicus 
b. кі leaves obovate to oblanceolate, .5 to 2.5 
em. bro zr not at ле rdate. 
a. Bim 5 1069 m ie leaves sinuate-den- 
tate de lyrate; offshoots short or su 
sessile. 
I. Stem leafy at base, жы да above; 
leaves not sharply den 
l. Plants sordid-tomen + e VEI So 98. В. зотаійиз 
2. Plants Me tomentose, more or less 
glabra 
s Leaf-blade much longer than 
broa 
Т Leaves more or less lyrate; 
achenes hirtellous or gla- 
TA 
0. Achenes hirtellous. 99. 8. neo-mericanus 
00. Achenes glabrous.. 99a. var. Griffithsii 
1 Issued April 3, 1918. 
NorE.—The present paper is continued from Ann. Mo. Bot. Gard. 4: 15-36. 
1917. 
ANN. Mo. Bor. GARD., VOL. 5, 1918 (37) 
