Senecio. | COMPOSIT (Hary.) 349 
Inv. nude at base, of 10-12 broad, flat, glabrous scales : 
Stem leafy below, nude and panicled upwards ; 
heads subcorymbose ..._ .... ... ...... (64) othonneeflorus, 
Stemless; rad. lvs. rosulate, stem scapelike, 
scaly; One-headed. co in in (65) petiolaris, 
§ 4. Pavcrrott. Rootstock perennial; roots often, (perhaps always) thickened 
or tuberous. Radical leaves none, or petioled. Stem rigid, glabrous or cobwebby, 
leafy at base, ending in a simple or corymbose peduncle. Leaves rarely all sessile, 
the lowermost commonly on long petioles, either quite glabrous or cottony (not 
scabro-pubescent), various in shape. Heads nearly nude at base, radiate or discoid ; 
rays yellow or purple. (Sp. 66-80.) 
({a.) Heads radiate; disc and ray-fl. purple ... 
(b.) Heads radiate; disc and ray-fl. yellow: 
(67) cymbalaricfolius. 
Lower leaves petioled, either cordate, lyrate, reniform or multifid: 
Lys. lyrate, reniform or multifid ; achenes striate, 
epee CN a eis nS 
Lys. cordate or ovate, repand-toothed ; achenes 
REESE OTR ase ioe sires ss SO 
Lower leaves sessile, oblong or lanceolate : 
Corymb few-headed; heads many-fl.; rays 8-10 
Corymb many-headed ;. heads few-fl. ; rays 3-5: 
(67) cymbalarizefolius, 
(66) cordifolius, 
(74) paucifolius. 
Rootstock not woolly (2); whole plant glabrous: 
Cauline lvs. lance-oblong, shortly decur- 
TONG Ave Se ae 
Cauline lvs. sessile, ovate, acute, stem- 
clasping Bre 
Rootstock woolly at the crown: 
Dise-fl. 20-30; lvs. acuminate, often 
falcate Or ie ee 2a: 
Disc-fl. 10-12; lvs. broad and narrow 
(c.) Heads discoid; disc-fl. yellow: 
Heads subsolitary, many-fl.; inv. scales 12-20: 
Glabrous: 
Lower leaves cordate-reniform or lyrate- 
pinnatifid... .. 
angled 
or oval, callous-toothed or 
ciliate... 
Leaves not peltate: 
Stem short; lvs. fleshy, rhomb-ovate; inv. 
Stems tall, leafy ; lvs. coriaceous or mem- 
branous; inv. sc. 5. 
Stem nude; lvs. membr., with slender 
veins... Sl GRE ES aE ay 
Stem leafy throughout; lvs. rigid, with 
strong, prominent, netted-veins 
(78) adnatus. 
(77) glaberrimus. 
(76) bupleuroides. 
(75) latifolius. 
(68) tuberosus. — 
(70) anthemifolius. 
(69) iver E: 5 
(72) oxyrizefolius. 
(71) orbicularis. 
(73) rhomboideus. 
(79) isatideus. 
(80) venosus. 
§ 5. Riemr. Shrubs or suffrutices, rarely herbaceous perennials, commonly much 
branched, leafy. eaves expanded, toothed or incised, or lyra 
to-pinnatifid or lyrate, 
variably pubescent or glabrous, rarely entire, midribbed and mostly closely netted- 
veined, Heads calycled, corymbose (rarely solitary), radiate or discoid. Rays yel- 
low or purple. (Sp. 81-116.) 
(a.) Heads discoid; fl. yellow or sometimes “ blue?” or white: 
Heads 80-100-fl., subsolitary; leaves scabrous, obl.- 
lanceolate, toothed... eee 
(81) picridifolius. 
