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A New Species and Variety of Senecio (Asteraceae) from Patagonian Argentina Roberto D. Tortosa Laboratorios de Botanica “Lorenzo R. Parodi”, Facultad de Agronorma, Universidad de Buenos Aires, Av. San Martin 4453, C1417DSE Buenos Aires, Argentina; Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Buenos Aires, Argentina. [email protected] Adriana Bartoli Laboratorios de Botanica “Lorenzo R. Parodi”, Facultad de Agronorma, Universidad de Buenos Aires, Av. San Martin 4453, C1417DSE Buenos Aires, Argentina. [email protected] Abstract. Two novelties in the genus Senecio L. America, tropical South Africa, and central and eastern Asia (Bartoli et al., 2004). and illustrated: a new species, S. breviramulus Tortosa In southern South America, the genus is represent¬ & Adr. Bartoli belonging to series Xerosenecio ed by ca. 643 species, of which 280 were recognized (Cabrera) Cabrera & S. E. Freire, and the new variety by Cabrera (1949) in Chile; 90 in Brazil, Uruguay, and pinohachense Tortosa & Adr. Bartoli for S. volckman- Paraguay (Cabrera, 1957); and 114 in Bolivia (Cabrera, 1985). In Argentina, according to Cabrera subser. Candidi (Cabrera) Cabrera & S. E. Freire. et al. (1999) Senecio is represented by 266 native The new species is allied to S. covasii Cabrera and S. species, arranged in three sections and 16 series. pumilus Tortosa & Adr. Bartoli, from which it differs Since the publication of that paper for Argentinean by the smaller, narrowly elliptic leaves and narrower species, several authors have made research contri¬ heads with fewer flowers. The new variety of S. butions. In 2001, Tombesi described S. calingastensis volckmannii differs from the typical variety by the Tombesi, belonging to series Corymbosi (Cabrera) presence of female ray florets and the pedunculate Cabrera subser. Brasilienses Cabrera & S. E. Freire (Tombesi, 2001). Later, Long (2002) included S. quequensis Cabrera of series Xerosenecio (Cabrera) guBCenaanarbet rorenolriu ,aS e qevn&uaee c eSipos.e pLreEt.e cs.n ieeecF ctr.See S. i aere nbl,era ec yviso ier rduaienme a PuX aleuntarsuog esoTvennaoie ractv oi(oaAsr air( egCd&eana bdtriA,en rdaaS)r).:. SCCHC.o aaienrbbyrerrommeenrrbi.aaa o eSs&& iuA bSsSds.u. re b.Eq EsB.ue . eaFrFn.rr ttreoAleiylriid,re, ee TBn souioanrrbtr ttsooitcehslhriae .i e &Fst( yi LalSnail.on. g Endi(ynl.2. mo)0F i0yrdAe4 ei)dori r fed. ( SCeo.Bsf ac basbrerreitebrroirgeelaiids)i, BaB(Cfaamarrbtt ooralle iirS,, a.d )d ecCe ol aval absasresieir r iaeCc uSa&abu lrjeSfes.rr uaEts i.yec F oSsrd.ei i ipfCreuearm.eb nLrielcauri asan usTupeobvorsrat eo erss.sau pC s&e ac hniAoed jideadrssi. TTBs(2uooa0brrr0stttooo5esslr)iaa. , f&&obFuo iSAntlh.ad d gEersi.d.pn BeFotciawrdiereoteiosr ie l.n i.b e aeAwTlnofr dtonee ignSrawi.tn nipatigi rue dmsta,o, n iT ldSsuo .es rr tfSioTreatsoseag ri rtXbaoaenesnlrda to i s&sB(es2 ani0Amret0cdou6irlos)i. vanagrioesdtaods, dec oSn. vomlceknmora nnnuiim seer od ifderee nfclioar edse. laL va arnieudeavda qdsuuebislcseernirsb.i esM dT icarr oonicaeenwpih as&lpi e(ScCtieeaisbb referlro,a m)f r CoPmaab trasegerorain e&isa ,S X.S eE.r o.c sFherinpeeiacruieo-, capitulos pedunculados. aanndd TSo.r tosspae gaanzdz iBniair toClia ibnrcelruad eads S. syronsomnyamrins uso Pf hiSl., Asteraceae, IUCN Red volckmannii Phil., which belongs to series Sujfruticosi Cabrera subser. Candidi (Cabrera) Cabrera & S. E. Freire. Tortosa and Bartoli later resurrected S. The genus Sei floccidus Hombr. & Jacquinot of series Xerosenecio species worldwide, with the highest diversity in subser. Filaginoidei and concluded that S. patagoni- desert regions of southern South cus Hook. & Arn. var. andersonii (Hook, f.) Cabrera is Novon 20: 106-110. Published on 18 March 2010. doi: 10.3417/2008065 Volume 20, Number 1 Tortosa & Bartoli 107 2010 Senecio (Asteraceae) from Argentina a synonym of S. arnottii Hook. f. (Tortosa & Bartoli, 2007). Recently, Tortosa and Bartoli (2008) have peduncles 0.3-2 cm. Capitula discoid, 12- to 14- redefined S. filaginoides DC. and resurrected three flowered; involucre calyculate, narrowly obconic, ca. species, S. caricifolius Hook. & Arn., S. leuciscus 5 X 2.5 mm; calycular bracts ca. 5, elliptic, 1-1.5 mm, Phil., and S. quenselii Skottsb., all belonging to series lanuginose; phyllaries 8 or 9, dorsally lanuginose, Xerosenecio subser. Filaginoidei. acuminate, apex dark. Disk florets hermaphroditic; During the revision of Senecio sect. Senecio (Aster¬ corolla yellow, tubular, glabrous, 5-6 mm, lobes aceae) in Patagonia, we found a new species of series triangular, ca. 0.7 mm long, ca. 0.5 mm wide at base; Xerosenecio subser. Microcephali and a new variety of anthers minutely tailed, 2-2.5 mm; filament collars S. volckmannii, which belongs to series Suffruticosi spatulate, ca. 0.45 mm; apical anther appendages subser. Candidi (Cabrera et al., 1999). Both series are deltoid, ca. 0.25 mm; the basal tails ca. 0.1 mm; style found in southern South America; series Xerosenecio, ca. 3.5 mm, ribbed; pappus bristles many, slender, capitula that are grouped in terminal corymbs, while in barbellate, ca. 5.5 mm, whitish cream. ssaoenrldiite aasrr yeS oudrjif osrcucotciiacdso isooinr, awwlliiytthh i nm1 g4ar3rog uispnpsae loc iffei tlswi,f oot rhtmoe t hfclraoepweie t(urtsol.a f Tiavhreee) bPeroeDvnii snftocriueb,nu dtAi oirnng etanhnteid n mah,ao buaintt taaeti.l nevs aSitneio ntnehcsei oon fbo rr1eth7v0 iro0af—m N1ue8luu0sq0 u hmeans. rsaindgialete sopre cdiiessc.o iTdh ec aopviteurllaa pmpianyg boef vtahreisaeb lec hwaritahcitne ras Toasuhstiocsr coisapptsee dc iienws i trhga rtoshpweesrc ioessnc aotdtfer yFre edss taunpcdaoy p Lus.l,oa tiSli otinwpsai t hLa .n,r doP cokiyas L., Mulinum Pers., and Chuquiraga Juss. the ai t il South American species of Senecio. Although IUCN Red List category. Due to the reduced useful for a genus with such a large number of species, population size, very restricted area of occupancy, and this artificial classification does not reflect the phylo- lack of data on changes in population size, this species should be considered Critically Endangered strated by Tortosa and Bartoli (2006), who transferred to (CR) according to IUCN Red list criteria (IUCN, the synonymy ol S. volckmannii two species with solitary 2001). heads, S. rosmarinus and S. spegazzinii, which were Etymology. The specific epithet breviramulus is Xerosenecio subser. Filaginoidei. stems of the new species. New Species for Senecio ser. X > 1. Senecio breviramulus Tortosa & Adr. Bartoli, covasii Cabrera and S. pumilus Tortosa & Adr. Bartoli sp. nov. TYPE: Argentina. Neuquen: 3(h7o°l0o1ty'Sp,e ,7 B0°A4A5 'W17,9 20 4F)e. bF. i1g9u8re2 , 1C. . P. Movia s.n. wdeliilstithpi ntigcsu cialsethtaeevrdee sd f raolnemda vtethhsee. msT mhbaeyl l enrite,s w n asmrsrpoaewlcle ireh,s e andcaasr rno wwiblthye (Cabre fewer florets (12 to 14 vs. 20 or more in both affined species). The new species is placed in series Tmoinrtoorsiab u&s eAtd cra. pBitaurltiosl ia ancgcuesdtieonrsib, usse dp afuolciii-s (a1n2g-u asdte 1 e4l-l)i pfltoicriiss Xtianexvrooonlsuoecnmreeicc,i o vwablheuicceah u tsoe w reoe df ertfehigneae r sdht haepa ess earhnieadsv ins(igTz oe rstoopfse ac tiha&el Bartoli, unpublished). ba* stee;n sdteerm, sh weroboadcye,o purso, strate, giving rise a, t ltahneuirg innoodsees, d(Be APPaAerl)aa. tny,p 3e6. °5A4'RSG, 7E0N°T20IN'WA,. 2N4e Juaqn.u e1n9:6 4C, h0o. sB Moealclakle, 1V1e1g2a0s fslcoawtteerriendg lesahvoeost.s Laeraivsiensg alftreormna tel,e asfeys sde, linear to Key to Species Allied to Senecio breviramulus in Patagonia nata rrtohwe lya peellxi,p ti0c.,8 —sp1a.2tu lacmte, rXo un0d.8e-d1 o.2r smligmh,t lym aacrguitne leaves, and phyllaries lanuginose when young, involute, entire or with 1 or 2 teeth per side, densely glaucous and lanuginose on both surfaces. Capitules- 108 Novon Figure 1. Senecio breviramulus Tortosa & Adr. Bartoli. —A. Fertile habit. —B. Capitulum. Drawn from the holotype Mavia s.n. (BAA 17904). spatulate, 0.8-1.2 cm X 0.8-1.2 mm; flower- 4.5 cm longis differt. 2b. Involucre obconic, 6-7 X 3-3.5 mm; florets 20 Shrub 0.1-0.15 m tall, with dense white woolly to 24; leaves elliptic, 0.8-2 cm X 1.5-3 mm; indument mixed with glabrous zones on stems, leaves elliptic, not spatulate, 2-3(-3.5) cm X 3-6 mm New Variety in Senei 11 S /-/- 7 s er. C. margins entire. Capitula radiate, solitary, peduncu late; peduncles 1.5-4.5 cm; involucre widely cam 1864. TYPE: Chile. Coquimbo: Cord. Santa Ana, panulate, ca. 12 X 10 mm; calycular bracts few llba.. StSa(ohdeeso nnalbo ee&atccylii npooAee ,advv srSoo. GlldcBcOkekal,mrm tpoTaahlonino,rn ntoovii, ia i Lrvsv.P .aadn)rr...o. , vvp.Ho iTn.l coYkVhPmoaElca:c hnkAemnnriagisn.ee nn tTiscn. na. lyt2rie.ni5clel hoamowr,mm, aet.c usuD bmieins i kcnta ahf.t eleo5 . r bmeRatamss ya,h l f welporimortheratt ispso chpnari;tos ttdeliirilmtleiadcbt;,e ,csc hcao.aor .ro 1tl1 0lg2a l; aXycne odlrl1uoo.ll5walrar,- Neuquen: Dpto. Picunches, paso Pino Hachado en el hito. "ligulas amanllas. muy vistosa Distribution and habitat. Senecio volckmannii \ 38°39'S, 70°54'W, 2018 m, 10 Feb. 1970, E. Nicora 7435 (holotype, BAA). Figure 2. species range. The type collection was collected n Volume 20, Number 2010