[Vol. 2 



616 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Distribution: northern Mexico. 

 Specimen examined : 



Nuevo Leon : Sierra Madre, near Monterey, 1 June, 1889, 

 Pringle 2894 (Gray Herb.), type. 



28. S. montereyana Wats. Proc. Am. Acad. 25 : 155. 1890 ; 

 Greenm. Monogr. Senecio, I. Teil, 23. 1901, and in Engl. Bot. 

 Jahrb. 32 : 19. 1902. 



An herbaceous perennial, more or less white-tomentose 

 throughout; stems one to several, 2.5 to 4 dm. high, from a 

 rather stout ascending rootstock; leaves mostly radical, in- 

 cluding the petiole 1 to 2 dm. long, 1.5 to 3 cm. broad, pinnately 



divided into narrow, oblong, cuneate to sublinear, entire or 

 few-toothed divisions, at first white-floccose-tomentose on both 

 surfaces, somewhat glabrate above; heads few, 10 to 12 mm. 

 high, radiate, on long naked peduncles ; involucre campanulate, 

 calyculate with minute bracteoles, tomentose ; bracts of the in- 

 volucre slightly shorter than the numerous flowers of the disk ; 

 ray-flowers about 12; achenes hirtellous-pubescent. 

 Distribution: northern Mexico. 



Specimens examined: 



Nuevo Leon : dry shaded ledges of the Sierra Madre, near 

 Monterey, 27 June, 1888, Pringle 1922 (Gray Herb., U. S. 

 Nat. Herb., Kew Herb., and Mo. Bot. Gard. Herb.), type. 



29. S. zimapanicus Hemsl. Biol. Cent.-Am. Bot. 2 : 248. 

 1881 ; Greenm. Monogr. Senecio, I. Teil, 23. 1901, and in Engl. 

 Bot. Jahrb. 32 :19. 1902. 



An herbaceous perennial ; stems 3 to 4.5 dm. high, simple, 

 leafy below, nearly naked above, striate, more or less pubes- 

 cent with flaccid-hirsute, jointed, and somewhat matted hairs; 

 leaves mostly basal, sessile or essentially so, 3 to 18 cm. long, 

 1 to 3 cm. broad, pinnately lobed or divided into oblong-ovate 

 dentate divisions, flaccid-hirsute or subarachnoid-pubescent 

 on both surfaces, more densely so beneath; inflorescence a 

 terminal corymbose few-headed cyme; heads large, 10 to 14 

 mm. high, conspicuously calyculate, radiate ; bracts of the in- 

 volucre commonly 21 (15-21) linear-lanceolate, 7 to 9 mm. 

 long, thickish, glabrous except at the penicillate tip; ray- 



