202 SYNGENESIA POLYGAMIA FRUSTRANEA. 



radiaia, 6— S millimctr. laia. Ligute quatuor aul quinque , llavtc , distinctx, 

 calycc paulo longiorcs , supcrnc laliores . tridentatar. Slylus 1 . Stigmala 2. 

 Flosculi hcrmaphroditi gracilcs , lubulosi , quinquedcntati , concolorcs. 

 Siamina 5. Antlier» in lubum coalil*. Siylus l . Stigmata 2. Semina parva , 

 oblonga.striala, glabra; in radio pappo destituta; in disco sclis quatuorad 

 scx, apicc penicilliformibus coronata. Receptaculum 2 millimetr. lutiiin, 

 paleaccum ; paleis acutis , hinc excavalis. Florct jEstatc. Folia conirua 

 suavcolcnua. 



Habitat in arcnis ad maris littora prope Sfax in regno Tunctano, 5 



POLYGAMIA FRUSTRANEA. 



CENTAUREA. 



CALYX ovatus , imbricatus squamis muticis , apice scariosis , 

 ciliatis aut spinosis. Florcs flosculosi omnes tubulosi ; neutri in 

 radio ; hermaphrodiii quinquefidi in disco. Stamina in tubum 

 coalita. Stylus unus. Stigma simplex aut apice bifidum. Pappus 

 sessilis, plumosus aut simplex. Rcceptaculum setosum. 



* Calycibus lavibus , inermibus. 



CENTAUREA CRUPINA. 



Centaurea calycibus incrmibus; squamis lincari-subulatis ; foliolis pin- 



natis, serralis. Liil. Spec. 1285. 

 Jacca annua , foliis iaciniatis serralis , purpurasccntc florc. T. Init. 444. 



— Schaw. Specim. n. 3^3. 

 Chondrilla foUis laciniatis scrratis, purpurascentc flore. C. B. Pin. i3o. 

 Senccio Carduus apulus. Col. Ecphr. 1 . p. 34. /(. bona. 

 Rhaponticoidcs annua , foliis lacinialis scrratis , purpurasccntc flore. Vail. 



Acad. 1 7 1 S. p. 179. 

 Chondrilla purpurca icnuifolia , capile ]ace.x , scmine Cardui. Barrcl. 1. 1 1 36. 



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