CENT. I!. ^i> 



sp. with Per. homispher. ineq. oxt. laxus imbri- 

 catus, Radiis 10-20 sinipl. series ang. vix. clcn- 

 tatis, seiii. aiig. pubescens, pappus scabro pilis 

 caliculatis — The name Aster root of Asterias 

 and otliers must be lengthened as did T. I re- 

 fer to Esenbeck &.c. for Sub. G. and akin Gen- 

 era; but some of Iiis are fahicious, Sj/mphotri- 

 chum for instance says Hooker, in fact many 

 Asters have annular pappus at base. Meantime 

 I add the indication of my own Genera settled 

 between 1815 and 1825. 



155. Leiaciienis Raf. (smooth ach) DifT. 

 154, Sem. levis, pappus simplex non caliculato; 

 Several Sub. G. 1. Psukelis. Per. foliaceus, 

 radiis 15-25. A. paludosus L. — 2. Merisis. 

 Per. laxis, Rad. paucis 10-12. A. cordifolius, 

 paniculatus Slc. — 3. Dodecalis Per. sep. ad- 

 pressis, rad. 10-12. A. corymbosus, dumosus 

 &.C. — 4. FiMBRAMis. Per. sep. adpr. iimbriatis, 

 rad. 15-25, A. foliolosus, sparslflorus «Slc. 

 auctoris. The shrubby Asters are akin to this 

 Genus. A. sericeus of America has 10 rays, 

 lane, acute, entire, A, argophylus of Australia 

 has only 3 rays, A. angustif. of Africa has 

 many oblong rays nearly biserial. They proba- 

 bly form as many Sub-Genera. My Venatris is 

 another perhaps, see 163. 



156. DiPLACTis R (double rays.) The Asters 

 with crowded long rays in double or triple se- 

 ries, narrow linear subentire, pappus simplex. 

 Such are A. alphms, caucasicus, novanglia, 

 cyaneus, hl^ndus <Slc. Akin to Leiachenis, 

 seeds commonly smooth. 



157. Stenactis Cass. auct. Differs from Di- 

 plactis by Per. subequal. phoranth verrucose, 

 pappus duplex, ex. brevis paleaceis — Aster chi- 

 nensis type and many Sp. to be distinguished 



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