208 



457. SENECIO. 



** L. imperfectly pinnatifid. Sp. 

 ' 10-12. 



*** L. distinctly pinnatifid, not ly- 

 rate. Sp. 13-18. 



**** L. lyrate or lyrato-pinnatifid. 

 Sp. 19-26. 



***** L. multiiido-bipianate: all 

 segments linear, acute. Sp. 27, 28. 

 ii. Plant hoary. 



a. Corymb compoimd. Plant woody at 

 base. Sp. 29-34. 



b. Corymb simple, crowded. Seeds 

 smooth. Sp. 35-37. 



c. Flowers few, on long stalks, or soli- 

 tary. Sp. 38. 



I>. L. undivided. Mowers with expanding 

 rays (except in Sp. 41). 



i. Flowers numerous, in a compound co- 

 rymb. Sp. 39-44. 



ii. Flowers few or solitary. Sp. 45-47. 



A. Pmi/s lomiting. Seeds nearly terete, striate. 

 Fhyllaries linear. L. divided: lower at- 

 tenuate into static ,• upper with a divided 

 ■auricle. Annual. 



1. vulgaris. Fl. in a corymb. L. pin- 

 natifid. Segm. incise. Seeds hairy on the 

 ribs. a. All summer. Cult, and waste. 



p. Fl. with a few rays. Holstein. Norm. 



2. pygniBexis. Stem branched from base. 

 Fl. solitary, terminal. Lower L. ovate, den- 

 tate. Upper L. oblongo-linear, nearly entire. 

 Seeds downy, a. 2, 3. Sandy and stony 

 shores. Cape Pojato, Sic. 



B. TMys small, revolute. Flowers in a corynib. 

 Cal. nearly cylindrical. Fhyllaries linear. 

 L. as in A. 



3. sylvaticus. AU L. pinnatifid. Segm. 

 sinuate, nearly equal, oblong, and somewhat 

 spatulate. Accessory Scales very smaU, ad- 

 pressed, hardly sphacelate. Seeds pulverulento- 

 pubescent. a. 7, 8. Woods and waste. 



fi, lividus. Upper L. more expanded at 

 base. 



4. fceniculaceus. Somewhat viscid, glan- 

 dular. Lower L. obovate, sinuato-dentate ; 

 upper dentato-pinnatifid ; uppermost some- 

 what triangular. Corymb 3-6-fiowered. Ac- 

 cessory Scales 6-10, small. Seeds downy. 

 a. AH the year. I>ry, Nap. Sic. Sard. Cors. 



5. viscosus. Viscid, glandular. L. pin- 

 natifid. Segm. sinuate: upper confluent. 



Accessory Scales lax, linear, half as long as 

 phyllaries. Seeds hairless, a. 6-10. Sandy 

 woods and waste. 



C. Flowers with expanding rays, hi a co- 

 rymb . Calyx turbinate. Fhyllaries lance- 

 olate {except in Sp. 7) . I'- as in A. {except 

 in Sp. 7, 8, 9, and sometimes 18). 

 i. Plant not hoary. Fhyllaries nearly as 

 long as disc. 

 a.. No accessory Scales on the calyx. 



6. ^alliens. Stem much branched. Out- 

 line of L. oblongo-spatulate. L. irregularly 

 pinnatifid. Segm. narrow, incise. Coiymb 

 few-flowered. Stalks scaly, a. 6, 7. s. Fr. 



b. Calyx with accessory scales. 

 * L. undivided. 



7. setnensis. L. somewhat dentate : lower 

 obovate, attenuate ; upper lanceolate, auricled. 

 Stem simple, densely leafy. Coi-ymb some- 

 what compound, 6-12-flowered. PhyUaries 

 linear. Scales numerous, short. Rays 10 or 

 12. Seeds finely downy, p. 7, 8. High, 

 on volcanic sand. ^tua. 



8. Marmorse. Glauco-pruinose. Stem 

 branched from base, ascending, hoUow. L. 

 thick, undivided, oblongo-obovate, semiam- 

 plexicaul. Corymb about 12-flowered. Stalks 

 hardly twice as long as flowers. Seeds downy. 

 a. 3-5. Marsh. Areola and Paulli Latino, 

 Sardinia. 



9. incrassatus. "L. fleshy, inodorous, 

 obovate or oblongo-spatidate: lower stalked, 

 dentato-crenate ; upper sessile, dentato-iucise. 

 Corymb very lax. Cal. smooth, at last conical. 

 Phyll. thickened at base, not sphacelate. Seeds 

 cylindrical, obscurely striate, a. 4, 5. Stony 

 shores. Maretimo, Sic." — Guss. Ftesembles 

 BeUis annua. 



** i. imperfectly pinnatifid. 



10. leucanthemifolius. Stem branched 

 from base, difiuse. Lower L. obovato-dentate ; 

 middle L. spatulate, dentato-pinnatifld ; upper 

 inciso-dentate. Fl. few. Stalks scaly. Seeds 

 downy, a. All the year. F)ry. Sic. Calab. 

 Ostia. Solfatara of Tivoli. 



;3. humilis. Fl. -stalks without scales. Cors. 

 Sard. Sic. 



11. vemus. " Smooth. L. not fleshy: 

 Lower L. stalked, obovato-spatulate, dentato- 

 crenate or entire ; upper amplexicaul, pinna- 

 tifid. Segm. toothed. Corymb somewhat lax, 

 few-flowered. PhyU. smooth, sphacelate. Seeds 



