E. Hassler: Ex herbario Hassleriano: Novitates paraguarienses. XXL 263 



r 



XLIX. Ex herbario Hassleriano: Novitates paraguarienses. XXI. 



(Originaldiagnosen.) 



Coin2yositue III (Fortsetzung.) 



361. Zexmenia pseudosilphioides Hassler, spec, now 



Aspilia silphioides Chod. haud Benth., PI. Hassl. I, 162 pp., II, p. 

 149 pp. maxima! 



Suffrutex ramosus 1—2 m, caules teretes basi sublignescentes 



glabrescentes, superne ± dense hispidulo-pilosi vel substrigulosi 



striatuli, cortice avellaneo vel isabellino obtecti; folia opposita petiolata 

 lanceolata vel oblongo-lanceolata, apice acuta, basi attenuata, leviter 

 inaequilatera, petioli 3—8 mm longi hispiduli vel strigulosuli, 

 lamina membranacea, supra viridis minutissime scaberula, subtus 

 paullo pallidJor scaberulo-pilosula, 25/6, 60/10, 90/24 mm margins basi 

 Integra, superne serratulo-dentata, vel rarius argute serrato-dentata, 

 dentibus distantibus mucronulatis, longe supra basin trinervis, nervis 

 supra subimmersis, subtus ut venas manifeste prominentibus. 



Floras ad apices caulium et ramorum solitarii vel ex axillis su- 

 premis in dichasium dispositi, longe pedunculati, pedunculi caule 

 similes erecti subflexuosi 5 — 15 cm longi sub flore leviter incrassati 

 et densius hispiduli, involucrum subtriseriale campanulatum ± 15 mm 

 diametro, bracteis exterioribus foliaceis interioribus ± longioribus, interdum 

 ut in aliis Zexmeniis ejusdem sectionis una alterave aliis duplo triplove 

 majore folium caulinis simile simulans, omnibus lanceolatis, subacutis, 



intus et extus scaberulo-hispidulis uni-vel subtrinerviis, ± distincte 

 serratulis, interioribus subfoliaceis exterioribus similibus sed brevioribus 

 dorso basi calvatis; receptaculura hemisphaericum, paleae lanceolatae 

 complicatae apice acutae dorso carinatae puberulae 6—8 mm longae 

 ligulae $ lanceolato-oblongae luteae 1 serlales ca. 12, apice obtusius- 

 culae breviter retusae, intus glabrae dorso pilis albis sparsis breviter 

 hispidulae, 11—13 mm longae medio 3—4 mm latae, corolla herm- 

 aphrodita infundibulari-tubulosa 5 mm longa versus basin tubuloso 

 angustata, glabra, limb! dentes minuti, triangulari-lanceolati 0,75 mm 

 longi extus puberuli, styli rami hirsuti minute appendiculati. 



Achaenia radii floriferi subtriquetra, anguste acute marginata vel 

 subalata, basin versus angustata, glabra, laevis 5 mm longa, angulis in 

 aristas 3 basi extus subalatas, superne setosas, barbellatas, achaenia 

 aequilongas, vel duabus y. brevioribus continuis, inter aristas squa- 

 mellis laceratis coalitis auctis, radii fructiferi crassiuscule triquetra basi 



acuta, ± conspicue vel interrupts subalata, alulis ad basin aristarum 

 vulgo manifestioribus et secus aristas continuis, achaenia laevi vel in 

 eodem capitulo ± distincte tuberculata, achaenia disci floriferi radii con- 

 formis sed anguste oblanceolata complanata, angulis 2 acutis vix alatis 

 in setas radii conformes basi squamellis coalitis conjunctis continuis, 

 fructifera valde variabilis, oblanceolata vel obcordala, aut tota margins 

 latiuscule regularitsr ad 1 mm late alata alis supra achaeniam ca I mm 



