598 



HELENIUM quadridentatum- 

 Louisiana Helenium. 



SYNGENESIA PQLYGAMIA SVPERFLVA. 



Nat, ord> Composite. Adansoii fam. 2. 103. 



CoRYMBlFER^, Jnssieu gcji. IIT, Div, VL Recept. pale- 

 aceum. Semen apice dentatutn aut paicaceum. Ftores in plurimis raaiati, 

 inpaucis flosculosi, Recept, Helenii subnudum. 



HELENIUM^ Involucrum (cat) simplex, polyphyllum^ subjcquale. 

 Recepiaculum hemispbsericum, medio nudum, margine paleaceum. Flosculi 

 c/isei tubulosi hermaphroditi ; rcrfw feminei ligulati, Acltenia (sent,) paleis 

 compluribus membranaceis coronata, Herbce foliU altcrnis decurrentihus : 

 Jtoribus termiTialibus corymbosis radio Jlavo, Kunth nov. gen. et spec. pi. 4. 

 299, 



H. quadridentatum, caule alato ramosissimo paniculate fastigiante, foliis 

 sessilibus obtusulis superioribus lanceolatis integris, inferioribus pinnati- 

 fidis, pedunculis filiformi-elongatis, involucri (calycis) folioUs lineari- 

 subulatis, disco brevioribus, flosculis disci 4-dentatis, I)on MSS- 

 Helenium quadridentatum. LabiUard. in act, soc* hist, nat, parts. 1. 22. t, 4. 

 Michaux bm\ amer, 2. 133. Willd, sp.pl. 3. 2121. Hort. Kew, ed. 2, 

 5. 85, Pursh amer. sept. 2. 560. Willd^ enum. % 898. Nuttall gen* 2. 

 173. Smith in Rees^s cyclop* in locc. 

 Rudbeckia alata. Jacq, ,eoU. 5. 154. ic. tar, 3. t. 593* 



Herba lati vireaSy supemh obsolete lanuginosa: rndix ^brosa annw. 

 Caules erecti, teretes, bifaridmv. trifaridm alati, paniculato-ramosi, ramis 

 aUeniis corymboso-fastiffianiibus. roL altema^ tetmia^ semlia,alatordecur- 

 rentia, plana^ enervia, immersi puncticulata^ obtusula, superiora elongato- 

 oblonga acuminata Integra^ infenora pinnato-incisa. Peduaculi terminalcs 

 V. axillares, soUtarii l-Jlorif Jiliformi-elongati, sulcatij obsolete tdllosi. 

 ^oxesjlavicantesi Inuus; dysentericae submquales^ erectu InvoL (caL)nra- 

 plex polypkyllum foliolis lanceolato-linearibus scabrinsculisj subduodenis 

 disco brevioribus refiexis^ Ka^us Jemineus Jlavus plurimus ad basin usque 

 divaricato-rotatus contiguus, subtiis obsolete lanuginosusj flosculis (12?) ses- 

 silibus (absque tubo) planis oblongis cuneatis 4rjidis siepiOsve tri^dis, lobutis 

 obtusis: discus viridi-lutescejis, hermaphr,, elevato-conicus, creberrimus, 

 Jlosculis brcvibus davato-infundibuliformibus; tubus brevissimus cequanspap' 

 pum; faux multotiis longior cylindrica subdiapbana; limbus 4rpartitus 

 pube externa glandulosa subvisciddt laciniis ovatis pluries brevioribus 

 jauce, Stam. inclusa: B.nth, fulvescentes valvulis viinutis (4?) nstulato-fuscis 

 apiculat(£* Germ, parvum^ cylindricum cuneato-oblongum hirsutius villosum 

 albicans^ pappo paleaceo e paleis 5 ovato-tanceolatis brevibvs; stigmata ex- 

 serta^ lineariay recurva, erassiusculajjlava; (radii) glabra, Achenia (sem.) 

 parva, obovata, t^etiat dense pilosa^ pappo paleaceo brevissimo. Recept, 

 elewito-conicumy punctatum, subnudum, periphceriA sola paleaceum, paleis 

 HnearUms. Don MSS. 



Native of Louisiana. Introduced in 1790 by Abbe 

 Pourret. A handsome hardy annual^ and as we have ob- 



