SOUTH AMERICAN BOTANY. 339 
and considerably smaller than in that species. Its leaves are three 
inches long, and one and a quarter broad, on a slender caniculate 
petiole three quarters of an inch long; the peduncle is about six 
lines, the calyx one line in length, tubular, obsoletely five-toothed, 
the corolla is four lines long, slender at base, slightly infundibuli- 
form above, with lobes somewhat expanded, tomentose outside, 
and on the margin, half a line long and broad, without any interme- 
diate tooth in each sinus: the filaments are one line and a quarter, 
the appendices two-thirds of a line, and the anthers half a line 
long. 
$. PAUCIFLORE. — 
4. Dunalia brachyacantha, (n. sp.) : pores spinosa, glaber- 
rima, ramis vix flexuosis, spinis nudis, brevibus; foliis in axillis 
fasciculatis, in turionibus alternis, oblongis, in petiolum elongatum 
tenuem spathulatis, obtusis, utrinque glabris, supra lucidis, subtus 
flavescenti-pallidis, pinnato-nervosis, marginibus subrevolutis ; 
floribus sub-ternis, pedunculis 1-floris, gracilibus, calyce glabro, 
curte tubuloso, membranaceo, 5-nervio, breviter 5-dentato ; 
corolla violacea, longe tubulosa, limbo angusto, breviter 5-lobo, 
marginibus floccosis, lobis triangularibus, apice callosis, dentibus 
rotundatis glabris in sinubus interjectis : staminibus inclusis. 
— Bolivia. v. s. in herb. Lindley (Bridges Coll., 1846). 
This species, although very distinct from D. /ycioides, much 
resembles it in its spinescent and glabrous habit; it has straighter 
branches, much shorter spines, and larger leaves: its stem is 
smooth, angular, and is marked with many small verrucose spots : 
its spines are only four lines long, its leaves, exclusive of the 
petiole, are two inches and a half long, and one inch broad, the 
petiole measuring seven-eighths of an inch: the peduncle is nine 
lines long, the calyx being two lines in length, and one line and 
a half in diameter: the stamens arise from a contraction of the 
tube, a little above its base, and are adnate to it by their central 
nerve for the length of two lines, leaving the winged margins quite 
free; from this point they become altogether detached and trifid, 
the filament being capillary, and four or five lines long, the appen- 
