[Vor. 3 
118 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
An herbaceous perennial, glabrous or white-floccose in the 
leaf-axils and on the margins of the petioles; stem simple or 
branched, 1.5 to 4 dm. high from a stout rootstock, striate, 
glabrous; lower leaves petiolate, round-ovate to ovate-oblong, 
1 to 6 em. long, 1 to 5 em. broad, usually cordate, crenate-den- 
tate, glabrous on both surfaces or slightly floecose-tomentulose 
in the early stages but soon glabrate; upper stem-leaves more 
or less pinnatisect and amplexicaul; inflorescence a subeorym- 
bose eyme terminating the stem and branches, few to many- 
headed; heads 8 to 10 mm. high, radiate; involucre campanu- 
late, ealyeulate, glabrous; bracts of the involucre 13 to 21, 
linear-lanceolate, attenuate, 5 to 6 mm. long; ray-flowers 8 to 
10, rays pale yellow; disk-flowers rather numerous; achenes 
strongly ribbed, glabrous. 
Distribution: western Mexico. 
Specimens examined : 
Durango: Quebrada Honda, 20-21 May, 1906, Palmer 213 
(Gray Herb., Field Mus. Herb., and Mo. Bot. Gard. Herb.), 
TYPE. 
52. S. Pammelii Greenm.! 
An herbaceous perennial, glabrous or slightly white-tomen- 
tulose in the axils of the leaves; stems erect, 2 to 4 dm. high, 
and, as well as the petioles, more or less purplish towards the 
base; lower leaves long-petiolate, rotund-ovate, 1 to 2.5 em. 
long, nearly or quite as broad, shallowly cordate or subtrun- 
cate, crenate to nearly entire; upper stem-leaves petiolate and 
somewhat lyrate to sessile and pinnatisect to entire; inflo- 
‘Senecio Pammelii Greenm. sp. nov., herbaceus p ubique glabrus vel in 
axillis foliorum paululo albo- e nir old eaulibus ereetis 2-4 dm. altis ad basin 
petiolis etiam y тое purpuraseentibus; 49 liis ылы longi-petiolatis 
rotu Fide atis em. longis et latis brevi-cordatis vel subtruneatis erenatis 
vel fer ét? ? toli 8 pit sala бе petiolatis et ae tis н. — us et 
Wee inforescentiis corymboso-eymosis; capitulis 7-10 mm. altis paucis 
vel pluribus radiatis; involuero Seite caly vo Wei ges icone ri 13-21 
lineari-lanceola tis 5 6 mm. longis acutis glabris; flosculis A ris 10-12, ligulis 
avis; floribus disei numerosis; onda glabris.—Colleeted in Peterson Cañon, 
Peterson, Utah, alt. 2895 m., 19 July, 1902, Pammel d Blaokiocod 3870 (Мо, 
Bot. Gard. Herb.), TYPE; on Ruby Mou GE near Blaine post-office, Elko Co., 
alt. 2710 m., 27 Aug., 1913, Heller 11096 (U. S. Nat. Herb. and Mo. Bot. 
Z 
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species may be looked for in herbaria under S. aureus, also under 8. 
"in having been distributed under both names 
