372 DESCRIPTIONS OF NEW SPECIES 



Solenotheca * tenetla. 



Hab. Near Arequipa, in Peru. (Mr. Curson.) Annual, with a simple, slender root. The 

 whole plant three to four inches high; very smooth. Leaves below opposite, above alternate, 

 deeply pinnatifid; segments two or three pairs, linear, serrate, or merely three-toothed at the sum- 

 mit, less than half a line wide; branches terminating in one or two flowers; capituli pedicel- 

 late. Involucrum smooth and cylindric, about half an inch long, a line wide, and a little ventri- 

 cose towards the base, five-toothed, the teeth shallow. Rays two or three, scarcely exserted, the 

 border somewhat round, greenish-yellow. Tubular florets about five, five-toothed, the dentures 

 connivent. Stigmas ending in a slender, pubescent cone. Pappus longer than the long and slen- 

 der achenium, very shining, somewhat yellow, achenium subsericeous. 



Subtribe v.— HELENIEtE. (Cassini.) 



Division I. — GaillardietE. 

 GkiLijh.n'Dik pulcliella; (Decand.) 



Hab. Arkansa plains ; common. 



Gaillardia aristata; (Pursh.) 



Hab. Arkansa Plains. 



Baldwinia uniflora; (Nutt.) Stem sometimes three-flowered. 



LEPTOPODA. (Nutt.) 



Leptopoda * pinnatijida; (Herb. Schw.,) radical and lower leaves incisely 

 pinnatifid, with remote segments, cauline sessile, narrow-linear, subulate, 

 smooth; stem fistulous, pubescent, one-flowered; sepals nearly in a single series, 

 very short; rays about twenty, linear; achenium pubescent, palese of the pap- 

 pus obtuse and awnless. 



Hab. East Florida. (Dr. Baldwin.) About a foot or eighteen inches high, somewhat slender, 

 with very narrow and rather numerous leaves; upper part of the stem naked; flower small; rays 

 about half a line wide, terminating in three small teeth. 



Leptopoda Heknium; smooth; leaves entire; radical, oblong-lanceolate, denti- 

 culate, lower stem leaves lanceolate-linear, attenuated into long petioles, mid- 

 dle stem leaves only decurrent; naked portion of the stem long; stem one to , 

 three-flowered, the apex, before flowering, tomentose ; involucrum shorter than 



the disk ; achenium smooth, the pappus slightly lacerate. 



Hab. West Florida. Sepals short, lanceolate and unequal; rays more than twenty, wedge- 

 shaped, trifid at the summit, sometimes very wide. 



