422 DESCRIPTIONS OF NEW SPECIES 
Suborder I]. LABIATIFLORA. (Decanp.) 
Tribe VI. MUTISIACE. (Lxss.) 
Subtribe 1. Leriexz. (Less.) 
* CURSONIA. 
Capitulum heterogamous, radiate; liguli flat, with rudiments of stamina, trifid 
at the apex, externally tomentose, inner lip obsolete, or none. Discal florets 
- hermaphrodite, tubular, five-toothed, ringent, two of the dentures larger. An- 
thers in the discal florets caudate, the apex appendiculate. Stigma clavate, 
undivided, the branches adnate, that of the ray exserted and clavate. Invo- 
lucrum hemispherical, loosely imbricated, the segments linear-lanceolate, 
setosely acuminate, and rather rigid. Achenium subcylindric-conic, some- 
what sericeous. Pappus bristly and scabrous, in several series, and very 
unequal, five central bristles much larger and longer.—A small herbaceous 
plant of Peru, with alternate, lanceolate, denticulate leaves, tomentose be- 
neath. Pedicels elongated, terminal. Capitulum somewhat loosely tomen- 
tose. Florets apparently dark red or purple. 
Cursonia * Peruviana. me 
With the aspect of a Chaptalia, to which genus it is allied. Leaves approx- 
een towards the summit of the branch, about an inch long, and less than 
half an inch wide, lanceolate, acute, attenuated below into a winged petiole, or 
properly sessile, repandly denticulate and acute, beneath somewhat whitely 
tomentose, above slenderly arachnoid; pedicels nearly naked, two to two and a 
half inches long, with one or two subulate bractes. Sepals about two series, 
linear-lanceolate, arachnoidly tomentose, nearly all of equal height, acuminated 
with long, bristly, rather rigid points. Rays few, about a single series, as long 
as the involucrum, flat, linear and trifid at the apex, of a very dark purple, 
almost black. Pappus a little shorter than the florets. Discal florets also dark 
purple; caudal processes of the anthers long and very slender, simple. Recep- 
tacle apparently naked.—(Collected in the mountains of Peru by Mr. Curson, 
with many other interesting plants, after whom this genus is deservedly named. ) 
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