AND GENERA OF PLANTS. 285 



and usually ciliate at base, with the leaves of the involucrum more obtuse. 

 Others, differing in no other external character, had a naked receptacle ! The 

 Carphepliorus pseudoliatris of Cassini is, then, nothing more than a true Liatris; 

 and I therefore retain the name I gave to the Alabama specimens, of Liatris 

 squamosa; but it may, perhaps, with others, form a section Carphephorus, 

 to which, however, our plant cannot be referred, as the chaff-bearing plant is 

 scarcely even a permanent variety. 



Liatris Hanigata, root tuberous; in every part very smooth; radical leaves, 

 long and linear, with smooth margins; stem somewhat attenuated, with very 

 short, almost filiform leaves; involucrum filiformly pedicellate, smooth, of 

 about two series of obovate, acute, coloured scales ; florets about five, or more ; 

 pappus short, barbellate; achenium villous. — Hab. In Florida and Georgia. — 

 Allied to the L. gracilis of Pursh, but the capituli are not at all globose, nor 

 the pedicels spreading, but erect, and without any proper bractes. Stem three 

 or four feet high, attenuated, and sparingly scattered with almost filiform, subu- 

 late leaves; radical ones near a foot long, pungently acute and coriaceous. 



Liatris resinosa of Decandolle is apparently the L. punctata of Hooker,, as 

 the pappus is merely scabrous, or barbellate, in L. resinosa. The L. punctata 

 appears intermediate with L. squarrosa and L. cylindracea. 



Liatris heterophylla appears, usually, to have the stem pubescent, and not 

 smooth. 



Subgenus. — * Leptocltnium. Suffruticose, Iranching; leaves opposite; capitu- 

 lum attenuated at the base; receptaculum very small Achenia acutely conic, 

 ten to twelve striate. Pappus barbellate, elongated in several series, and, as 

 rvell as the Jlorets, purple. 



Liatris fruticosa, (Nutt.) suffruticose; leaves opposite, above alternate, small- 

 er, cuneate-oblong, entire; branches corymbose, naked towards the summit; 

 capituli coarctate. — Hab. Collected in East Florida by Mr. Ware. Capituli in 

 smallish terminal clusters, upon slender pedicels ; sepals lanceolate, acuminate, 

 loosely imbricate in about three series, the innermost much the longest; florets 

 VII. — 3 w 



