[Vol. 10 



74 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



noideo-tomentulosis supra mox glabratis reticulato-nervatis et 

 subinde paulo bullatis, medio nervio venisque subtus promi- 

 nulis; petiolis 5-7 mm. longis; inflorescentiis terminalibus mul- 

 ticapitatis pyramido-paniculatis, ramis paniculae subracemosis ; 

 capitulis heterogamis 12-15 mm. altis radiatis; involucris an- 

 guste campanulatis calyculatis; involucri bracteis saepe 13 

 lineari-Janceolatis 10-12 mm. longis acutis penicillatis glabris 

 vel parce puberulentis, marginibus scariosis; floribus ligulatis 

 plerumque 8, tubo gracile 7 mm. longo, ligula anguste oblonga 

 circiter 7 mm. longa 2 mm. lata 5-nervata flava; floribus disci 

 12-15 tubulo-campanulatis circiter 1 cm. longis flavibus, limbo 

 basi sensim ampliato aequaliter 5-dentato; pappi setis circiter 

 1 cm. longis fuscentibus; achaeniis glabris. 



Tall erect herb; stem strict, striate, subarachnoid in the 

 early stages, later more or less glabrate, leafy to the inflores- 

 cence; leaves alternate, petiolate, oblong-lanceolate, 10-15 cm. 

 long, 2-4 cm. broad, acuminate, acute, shallowly sinuate-cal- 

 lous-serrate, rotund or cuneate at the base, arachnoid-tomentu- 

 lose on both surfaces in the early stages, soon glabrate, reticu- 

 lately nerved, and somewhat bullate above, the median nerve 

 and lateral veins conspicuous beneath; petioles 5-7 mm. long; 

 inflorescence a terminal many-headed pyramidal panicle; heads 

 heterogamous, 12-15 mm. high, radiate; involucres narrowly 

 campanulate, calyculate; bracts of the involucre usually 13, 

 linear-lanceolate, 10-12 mm. long, acute, penicillate, glabrous 

 or sparingly puberulent, margins scarious; ligulate flowers usu- 

 ally 8, tube slender, 7 mm. long, ligule narrowly oblong, about 

 7 mm. long, 2 mm. broad, 5-nerved, yellow; flowers of the disk 

 12-15, tubular-campanulate, about 1 cm. long, yellow, the limb 

 gradually ampliated from the base, equally 5-dentate; setae of 

 the pappus about 1 cm. long, tawny; achenes glabrous. 

 Colombia: depression in prairie, Mariquita, Department of 



Tolima, alt. 250-300 m., January 7, 1918, Penned 3636 (N. Y. 



Bot. Gard. Herb., Mo. Bot. Gard. Herb., and U. S. Nat. Herb.), 

 type; Honda, August, 1919, Bro. Ariste-Joseph A 356 (U. S. 

 Nat. Herb.); without definite locality, coll. of 1917, Rusby & 

 Pennell (N. Y. Bot. Gard. Herb.). 



This species is somewhat aberrant in the genus Senecio on 

 account of the relatively long and slightly conical- tipped or 

 obtusish style-branches. In general, however, it conforms with 

 the technical characters of the eenus. 



