Dbc, 1893.] BOTANICAL SOCIETY OF EDINBUEGH. 61 



Tessaria ABSINTIIOIDES, DC. 



A small tree like a miniature Lombardy poplar in habit, 

 15—20 ft. in height. Forms a dense growth on the low- 

 lying islands of the Parana, especially about Goya, and 

 north of this. Also on banks of Bermejo near its mouth. 

 Occasional thickets on the Pilcomayo, more especially on 

 the southern branch. 



Argentine provincial name Palo hoho. 



Enhydra maritlma, DC. 



A succulent plant whose stems creep over the surface of 

 mud or shallow water, in fresh-water marshes. 

 Fl. 9th Oct., near Fortin Page. 



ECLIPTA erecta, L. 



Hab. — Piio Pilcomayo. 



"VVedelia Kerrii, K E. Br. (n. sp.). — Caule herbaceo, 

 erecto, dichotomo vel trichotomo, hispido ; foliis breviter 

 petiolatis, ovatis, obtusis vel subacutis, basi in petiolo 

 angustatis, obtuse serratis, utrinque subhispidis ; pedunculis 

 e dichotomiis solitariis, et apice ramorum subcorymbosis. 

 monocephalis, hispidis; involucri squamis biseriatis,.lanceo- 

 latis, subobtusis, hispidis ; paleis lineari-lauceolatis concavis, 

 subacutis, ciliatis, apice luteis ; ligulis late oblongis, 

 tridentatis, luteis ; pappi squaniulis paucis, minutis, caducis, 

 acha?niis calvis, compresso-tetragonis, obpyramidalis, apice 

 truncatis cum tubercula central!, lateris scrobiculatis. 



Hab. — Rio Pilcomayo, Kerr ! 



Folia l|-2^ poll, longa, 3-li jdoII. lata. Pedunculi 

 1-3 poll, longi. Capitula f poll, diani. Achu-nia 1}, lin. 

 longa, 1 lin. lata (IST. E. Brown). 



Wedelia pilosa, Baker {W. hrachycarpa, Baker). 

 Hab. — liio Pilcomayo. 



Wedelia subvaginata, N. E. Br. (n. sp.).— Caule erecto, 

 subglabro vel sparse et minute appresse strigoso, foliis 

 oppositis, lanceolatis, subacutis, mucronatis, basi acutis, 

 pauce et minute denticulatis, trinerviis, subrigidis, supra 

 subtusque appresse strigosis, breviter petiolatis, petiolis 

 basi in vaginam brevissime connatis ; pedunculo solitario, 

 elongate, appresse strigoso ; involucri squamis biseriatis. 



