SYNGENESIA. -Eq.UALlS. 123 



Scapes l-flo\vered; leaves rancinate. 

 Species. I. L. Turaxacuj?!. Xataralized: introdaced. — 

 A genus of 5 species, indigenous to Europe. 



528. PRENANTHES. L. 



Flosculi definite, 5 to 20. Calix caliCulate. 

 Receptacle naked. Fappus simple, subsessile. 



A polymorphous, but natural genus, principally herba- 

 ceous, rarely slu-ubby, and 1 species spinescent; leaves t'ov 

 the most part angularly dentate, pinnatifid, or runcinate, 

 rarely minute and subulate; iiowers often paniculate, con- 

 glomerate, subcorymbose or solitary and terminal, purp- 

 lish, white, ochroleucous, or rarely yellow. Calix 4, 5; 8, 

 or 12-parted, squamose at the base. Tappus somewhat 

 scabrous. 



Species. 1. P. altissima. 2. cordata. 3. virgafa. P. 

 ruble unda. VVilld. 4. simplex. Ph. 5. crepidlnea. 6. alba. 

 7- Serpentaria. Ph. Scarcely distinct enough from P. alba. 

 8. racemosa. 9. illmoensis. 



10. juricea. Ph. Dwarf and nearly leaf.ess; stem numer- 

 ously and dichotomously branched, grooved; leaves subu- 

 late and sheathing, very short, branchlets subfastigate, 1- 

 flowered; calix 5-cleft, 5 to 7-flowered. Hae. from the 

 river Platte to the Mountains, in the alluvial sand-hiils oi' 

 the Missouri. Flowering in May. Flowers rosaceous, 

 Obs. Root tuberous and brittle, very deep and creeping, 

 charged with an abundant milky sap. Stems about 12 

 inches high, appearing nearly leafless. Radical leaves 

 none, those of the stem from 1 to 10 lines long and pun- 

 gently acute 



11. * aphijUa. Dwarf and almost leafless; stem nearly 

 simple, sparingly andvirgateiy branched, grooved; radical 

 leaves narrow hnear, entire, cauline minute, subulate, and 

 very remote; branches 1-fiowered, elongated; calix 8-par- 

 ted 10 to 12-tlowered. IIaf,. Near St. Mary's in West 

 Florida. — Dr. Kaldwyn. 0ns. Root pereiinial. Stern 

 sniooth, about 12 inci)L^s high, with only 2 or 3 remarka- 

 bly naked virgate branches; leaves scarcely visible; flow- 

 ers large, and pale rose-colour. Nearly allied to the prece- 

 ding. 



A genus of near 40 species scattered over both hemis- 

 pheres; Japan affords 10 species, India 4, Europe and the 

 Levant 9, Siberia 2, Caraccas 1, and 1 in the island of 

 Tenerifte, a few others are of uncertain locality. — Several 

 of the Xurth American species, in common with other ge- 

 nera of the CicHORACE^, afford on incision an abundant 

 milky fluid, well ascertained to be Opium in several spe- 



