SENE'CIO POPULIFO'LIUS. 
POPLAR.LEAVED SENECIO 
OR 
DICOTYLEDONE;®. 
Natural division 
to which 
this Plant belongs. 
NATURAL ORDER, COMPOSITE.^ 
CALYCIFLORffi, 
OF 
DECANDOLLE. 
Artificial divisions 
to which 
this Plant belongs. 
SYNGENESIA, 
polygamia, 
OF LINNEUS. 
No. 215 
GENUS. Senecio. Lessing, Capitulum multiflorum, liomopamum, 
discoideum vel heterogamum, floribus radii uniseriatis, ligulatis, feminei.s, disci 
tabulosis, hermaphroditis. In volecri nunc iiiuli, nunc squamellis accessoriis 
calyculati, squamae uniseriatm, apice saepe sphacelatse, margine subscariosae, 
dorso plerumque binervataj. Receptaculem epaleatum, nudum, vel alveola- 
turn. CoROLLdE radii ligulatae, disei tubulosae, limbo quinque dentato. An- 
THERiE eeaudatm. Stigmata disci truneata, apice solo penicellata. Achenia 
teretiuscula vel sulcato-angulata, erostria, exalata. Pappus pilosus, pluriseri- 
alis, caducus, setis reetis, subt-pqualibus, tenuissimis, vix scabris. Genus^totius 
regni vegetabilis vastissimum, speciebus herbaeeis vel fruticosis polymorphis, 
per totum orbem obviis, plerisque endemicis, foliis alternis, eapitulis solitariis, 
eorymbosis vel paniculatis, corollis disci plevumque luteis, rarissime purpureis, 
nunquam nisi in stirpibus cultis albis, ligulis flavis, rarissime purpurascenti- 
bus vel albis. Endlicher. 
SPECIES. Senecio popultfolius (Decandolle non Linn^vs) fruti- 
cosus, foliis petiolatis eordatis ovatis acucis angulatis denticulatis, supra adultis 
glaberrimis, subtus ramisque cano-tomentosis, eapitulis eorymbosis glabris, 
pedieellis tenuissime braeteolatis, iiivolucri squamis 12-15, ligulis circiter 10, 
Decandolle: Prodromus. Pars, sexta, p. 409. 
Character of the Genus, Senecio. Capitule iiiaiiV"flow- 
erecl, homogamous, and discoid or heterogamous; flowers of the ray 
in a single row, ligulate and pistilliferous, those of the disk tubulose, 
and hermaphrodite. TJie Involucres sometimes naked, sometimes 
furnished with a set of accessory scales, the scales in a single series, 
and frequently sphacelated at the top, subscariose at the margins, 
generally two-nerved on the back. Receptacle without palea,'naked, 
or pitted. The corollas of the ray ligulate; those of the disk tubular, 
limb, five-toothed. Anthers devoid of an appendix. The Stig¬ 
mata of the disk truncated, furnished with a pencil of hairs at the up¬ 
per part only. Achenia roundish or furrowed and angular, without 
a beak, and without wings. Pappus pilose, arranged in several rows, 
soon separating from the fruit (seed, incorrectly so called) the bristles 
straight, nearly equal, very slender, and scarcely rough. 
Description of the Species, Senecio populifolius. Suffru- 
TtcosE, stem three or four feet high, densely clothed with white wool 
below, progressively becoming naked towards the upper part. Leaves 
alternate, petiolate, petioles either aurieled at the base and studded 
