Plants Collected in Paraguay. 139 



denser and larger clusters of flowers, larger heads (7-10 mm. long), 

 and tawny pappus. The flowers are very fragrant, and attractive 

 to insects, which were hovering over the blossoms in great numbers 

 when collected. 



Willougllbya SCandens (L.), Kuntze, Rev. Gen. PL, 371. 



Asuncion (182); Pilcomayo River (1082). November-January. 



Solidago polyglossa, D.C., Prod., v, 10. 



Asuncion (111); Pilcomayo River (1080). 



The only golden-rod which I found in Paraguay. Yery abundant 

 in all the waste grounds around Asuncion, and flowering the entire 

 season from October to May. Of this genus I believe that not 

 more than one or two species at the most are known to occur in all 

 that part of South America. This plant is esteemed as a vulnerary 

 by the common people, and hence was named S. vulneraria by 

 Martins. 



Aster sill) tropicus, Morong, n. sp. 



A. divaricatus, T. and Gr., var. graminifolius, Baker in Mart. Fl. Bras., vi, pt. 3, 

 22. A. exilis, Ell., var. australis, Asa Gray, Syn. Fl., i, pt. 2, 203. 



As found in Paraguay the plant whicli is commonly referred to this form 

 seems sufficiently distinct from A. divaricatus to merit specific designation. It 

 grows from 4 to 9 dm. high, Avith a stout, glabrous, often much branched stem. 

 Leaves glabrous, lanceolate or linear-lanceolate, reduced on the branchlets to 

 subulate bracts, entire or sparsely serrulate, the largest 6-8 cm. long and 5-8 

 mm. wide. The heads are usually much larger than in our North American 

 plant, being often 8-10 mm. long, containing 50 or more flowers. Involucral 

 scales in 4 or 5 rows, a little over 1 mm. in breadth, obscurely 1-3 nerved, 

 rather abruptly acute, the innermost 7-8 mm. long, with green or rosy tips. 

 Ray flowers small, pale blue, recurved, very fugacious. Disk flowers thread- 

 like, scarcely surpassing the pappus. The pappus somewhat coarse and more 

 copious than in A. dioaricatus. Achenia pubescent. 



This aster is much more stocky, the branches more massed, leaves 

 and flowers more numerous than in the next species, of which it has 

 been called a variety. It grows on the banks of fresh water and 

 on uplands far inland. 



Near Asuncion (620). March. 



Aster exilis, Ell., Bot. S. Car. and Georgia, ii, 344. 



Pilcomayo River (1081). February. 



Growing in saline soil like the plant of this country. Much of 

 the region along the Pilcomayo abounds in salt pools, and the 



