[Vor. 5 
40 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
п. Бе 8 to = = high, more ог less 
eafy stem 
1. are "relatively narrow, .5 to 1.5 
width 
мы discolo FOUS сес 126. 8. loratifolius 
oe ree 127. S.cynthioides 
Meee с а ес S. fastigiatus 
in w 
€ of Мелде V са 129. S.umbraculifer 
Plants of зи United 
States. 
** 
Т Involucral ыа. коа 8; 
achenes gla .130. S.atratus 
1f Involueral ағыз about 21; 
achenes hirtello = 181. S. sphaerocephalus 
97. S. arizonicus Greene, Bull Torr. Bot. Club 10:87. 
1883; Gray, Syn. Fl. N. Am. 12: 392. 1884, and ed. 2, 1886, 
excl. plant of Pringle; Greenm. Monogr. Senecio, I. Teil, 24. 
1901, and in Engl. Bot. Jahrb. 32 : 20. 1902. 
An herbaceous perennial; stems erect or nearly so, 1.5 to 
4 dm. high, from a stoutish caudex, at first white-tomentose, 
soon glabrate above, permanently so at the base; lower leaves 
ovate to ovate-lanceolate, including the narrowly winged 
petiole 5 to 15 em. long, 2 to 5.5 em. broad, often subcordate, 
acute, unequally dentate, loosely floccose-tomentose in the 
early stages, more or less glabrate; upper stem-leaves ses- 
sile, lance-attenuate, somewhat clasping the stem, often 
much reduced and bract-like; inflorescence a subcorymbose 
cyme; heads 8 to 12 mm. high, radiate; involucre slightly 
calyculate; bracts of the involucre 13 to 21; ray-flowers 9 to 
12, rays yellow; disk-flowers rather numerous; achenes 
slightly hirtellous. 
Distribution: Arizona and New Mexico. 
Specimens examined: 
Arizona: Prescott, coll. of 1876, E. Palmer 264 (Gray 
Herb.) ; Lynx Creek, 31 Мау, 1883, Rusby (Gray Herb. and 
U. S. Nat. Herb. Nos. 47595, 47596), TYPE. 
New Mexico: Ruidoso Creek, White Mountain region, 
Lincoln Co., alt. 2030 m., 29 June, 1895, Wooton (U. S. Nat. 
Herb. No. 735294). 
