[Vor. 4 
22 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
glabrous or essentially so; radical and lower stem-leaves 
obovate to oblong-oblanceolate in general outline, merely den- 
tate to deeply pinnatifid into relatively small toothed divi- 
sions, including the petiole 3 to 10 cm. long, .5 to 1.5 cm. 
broad, at first usually lightly tomentulose, later more or less 
glabrate, thickish in texture; upper stem-leaves deeply pin- 
natisect into small divisions, often much reduced; inflo- 
rescence a few to several-headed corymbose суше; heads 8 to 
10 mm. high, radiate; involuere campanulate, sparingly ealye- 
ulate; bracts of the involuere usually 21 (13-21), linear- 
lanceolate, 5 to 7 mm. long, glabrous; ray-flowers 8 to 10, 
rays yellow; disk-flowers 30 to 60; achenes usually glabrous. 
Distribution: northern Arizona and adjacent Utah. 
Specimens examined : 
Arizona: Lynx Creek, 31 May, 1883, Rusby 665 (Gray 
Herb., U. S. Nat. Herb. in part, and Mo. Bot. Gard. Herb.) ; 
northern Arizona, coll. of 1884, Lemmon 3263, 32634 (Gray 
Herb.) ; Grand Cañon, alt. 2130 m., Мау, 1903, Grant 1192 
(Univ. Ariz. Herb.) ; Grand Cañon, 12 June, 1891, MacDougal 
185 (U. S. Nat. Herb.) ; Williams, Coconino Co., 1-15 June, 
1901, Н. S. Barber 67, 93 (U. S. Nat. Herb.) ; Colorado 
Plateau, Grand Сайоп, 9 June, 1901, Ward (U. S. Nat. Herb. 
No. 410254) ; Bright Angel Trail, Grand Сайоп, 22 Oct., 1905, 
Eastwood ? (U. S. Nat. Herb.) ; near Kindrick Mountains, alt. 
2000 m., 7 July, 1901, Leiberg 5662 (U. S. Nat. Herb.) ; with- 
out locality, coll. of 1869, Dr. E. Palmer (U. S. Nat. Herb.), 
form with slightly hirtellous achenes; mesa below Buckskin 
Mountains, alt. 2135 m., 21 Sept., 1894, M. E. Jones 6063i 
(U. 8. Nat. Herb.). 
87. S.scalaris Greene, Pittonia 4: 108. 1900. 
An herbaceous perennial; stem simple, erect, 2 to 6 dm. 
high, glabrous; basal and lower stem-leaves petiolate, oblong- 
ovate to oblanceolate, including the petiole 2.5 to 9 em. long, 
„5 to 2 em. broad, crenulate to sublyrate, glabrous or with 
traces of a white flocculent tomentum; upper stem-leaves ses- 
sile, frequently appressed to the stem, pinnately parted into 
rather numerous short oblong-cuneate subentire to obtusely 
