THE BOTANY OF SOUTH AMERICA. 171 



cile filiformibus : foliis spathulato linearibus, obtusiusculis, 

 calloso-mucronatis, calyce urceolato tubuloso, 10-costato, 

 inter costas membranaceis, laciniis eequalibus lanceolato- 

 acuminatis, calloso-aristatis, subpatulis ; corollae tubo 

 gracili, glanduloso-pubescenti, limbo late campanulato, 

 lobis amplis rotundatis; capsula ovata, calyce aucta in- 

 clusa. — Provincias Argentinas. v. v. 



I met with this species at Encrucijada, in the Province of 

 San Luiz, and in Buenos Ayres, in which last place it was 

 also found by Tweedie, from whom the seeds cultivated in Eng- 

 land were obtained ; from the former locality, the branches 

 are stronger, and more ligneous ; but shorter, more branched, 

 and more herbaceous from the latter. The leaves are £ to 1 

 inch long, 1 line broad, almost glabrous, the internodes mea- 

 suring 4 lines : the peduncle is of the length of the axil, 

 4 lines, opposite the leaf, and flexuosely divaricate with the 

 stem, which is, however, quite straight below; the calyx, 

 almost glabrous, is 4 lines long, cleft half way down into 5 

 spreading rigid lobes, the tube of the corolla is extremely 

 slender, 6 lines long, the border being about f inch diameter, 

 it is white, with longitudinal striated purple lines. The cap- 

 sule is about 4 lines long and sub-4-valved. 

 U. Nierembergia stricta, (n. sp.) — glabriuscula, caulibus 

 simplicibus, lignosis, erectis, gracillimis, strictis : foliis spa- 

 thulato-linearibus, acuminatis, calloso-mucronatis, eveniis, 

 utrinque glabris, margine sub-ciliatis : pedunculis oppositi- 

 foliis; calyce 10-costato glabro, costis ciliatis, laciniis spa- 

 thulato-lanceolatis, aristatis, erectis, incequalibus, tubo 

 3plo-longioribus, corollae tubo valde elongato, glanduloso- 

 pubescenti, calyce 3-4plo longiori, limbo late campanulato, 

 lobis brevissimis rotundatis. — Buenos Ayres, v. s. in herb, 

 rneo. 



This plant may be only a variety of N. aristata, but it cer- 

 kuriy differs from it in having very slender simple stems 

 w ith more distant internodes, and only 1 or 2 terminal 

 flowers; its calyx has shorter, broader, and more erect seg- 

 ments, and the corolla is larger, with a far more elongated 



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