194 



ferior llosciilo vix brevior, snperior illo paiilo longioi) ; — ^ 

 a i?i Ijiuhii (P. tenella Pursh., fid. spccira. amorican.), 

 sp^cie P. pilosae proxima, nostru dilfert ligula glabra (in 

 Ula barbata), paniculac radiis doii setosis (in illa basi scr, 

 tftsis), spiciilis majoriliiis, pr;ieserlitn latioribiis, giumis ca-: 

 lycinis majoribiis (in illa aanis) , nee non corollarum val- 

 vnja extcriore aeiita (in illa obttisa). Colitur etiara in hor- 

 tis sab P. aegyptiacae , P. namaquensis atquc P. brasi- 

 liensis nomiiiil)Us; prftna dilFert ligiila barbata, spiculis pal- , 

 lidis, corollarnm valvnla extorioro obtusinscala aliisqii« no-, 

 tis; altera recedit ramis ramnlisqne lacvibiis (in nostra sca- 

 bris), Hosculis diandris (in P. PursTiii triandrisj, floscnlo- 

 rnin valvnlis laevissiinis obtusis (in nostra aculis carina 

 scabris); ultima distal foliis planis (in nostra convoliitis), 

 gliimis caljcinis siibaeqnalibiis obtusis (in P. Purshii Talde 

 iuaeqiialibns aculis), valviilis corollinis tenerrimis hyaliuis 

 longitiidiue subaeqnalibus oblnsis (iu nostra valviila exterior 

 longior acuta). — Formae diiae, nisl species distinctae co- 

 Inntur : ' 



«. panicnlae radiis plerumque ad basiu nsqne floriferis ; 

 spiculis majnribns 6 — 8-floris. '"" 



ß. paniculae radiis basi nudis; spiculis minoribus 4-^^5- 

 jBoris ( rarius scxfloris). — Forniao antccedenti valde 

 sirailis, sed characlcribns datis distal. Nnm species di-' 

 stiucta? — In lioriis occurrii s. n. P. chinensis, pun~ 

 ctatae^ pellttcidac et Bcrterianae. 

 Palria P. Purshii luibis iguola. O 

 2^53. Ptilomeris, asiatica Nwtt. iu Transact. Amer. pbil. 

 spc, , n. ser. 7. p. 382; Hymeno.vy$ californica Hook, in 

 1^0,1. raag. tab. 3828, Torrey et Gray fl. of North Amor. II. 

 p. 380; Shortia californica Hortor, (non Grab.). — Plan- 

 tula ojmiino, »t videtur, sui grneris, a gcnuinis Hyviena-n\ 

 jc^^is sipeciebus sati$ distlnita. — M 



