Tas. 5608. 
NIEREMBERGIA. rtvuzaris. 
Water Nierembergia. 
Nat. Ord. Souanem.—Pentanpria Die@ynta. 
Gen. Char. (Vide supra, Tas. 5599.) 
NreremBereta rivularis; glaberrima, caule gracili repente, foliis alternis 
longe petiolatis oblongis oblongo-spathulatisve obtusis, floribus bre- 
viter pedunculatis oppositifoliis, calycis tubo cylindraceo supra me- 
dium 5-lobo, lobis oblongo-lanceolatis subacutis, corolla albida y. dilute 
flavescente, tubo gracili elongato, limbo late campanulato explanato, 
lobis obtusis. 
Nrerempereia rivularis. Miers in Hook. Lond, Journ. Bot. v. 5. p. 167. 
Walp. Rep. v. 6. p. 568. 
’ A beautiful little species, a native of La Plata, whence 
it was introduced by Messrs. Veitch, of the Royal Exotic 
Nurseries, Chelsea, with whom it flowered in July of the 
_ present year. I have dried specimens from various places 
near Buenos Ayres, where it was discovered by the late Mr. 
Tweedie upwards of thirty years ago. This collector de- 
scribes it as a most lovely and fragrant plant, abounding by 
the sides of the Plate river, and only within high-tide mark, 
its flowers rising above the dwarf grass which grows 1n simi- 
lar situations in such profusion, that the plant is discerned 
from a great distance. The flowers are sometimes tinged 
with rose-colour. : a 
Descr. Everywhere glabrous. Stems slender, creeping = 
rooting abundantly, branched and matted. Leaves very = 
riable in size, with the petioles one to three inches long; 
petioles very long and slender; blade oblong or oblong-spa- 
thulate, obtuse, membranous, nerveless or almost so. Flowers 
sessile or shortly peduncled. Calyx a quarter to aed 
quarters of an inch long, cylindric, with five slightly _ - 
ing oblong-lanceolate subacute lobes. Corolla-tube one to 
NOVEMBER Ist, L866. 
