SYNGENE8IA. iEt^UALIS. 125 



In this genus there are 4 shrubby species, the rest are 

 herbaceous, several attain a considerable magnitude, pro- 

 ducing- blue, white, or yellow flowers; leaves runcinate, 

 pinniitifid, or spinulosely denticulated. 



Species. 1. S. macrophylhis. 2. alpinus. 3. leucophcevs. 

 4.JloncIanus 5. acuminatus. 6. pallidus. 7- arvensis. 8, 

 olevaceus 'I'he 2 last introduced. 



9. * ludoviciaTuis. Leaves all runcinate, retrorsely and 

 sharply toothed; peduncles and calix niiktd; panicle diva- 

 ricate; flowers yellow; pappus conspicuously stipitate. 

 Hab. In humid places, in the open plains, around Fort 

 Mandan on the Missouri. Flowering- in June. Very smooth; 

 3 to 5 feet high; stem leaves semiamplexicaule. By tjie 

 stipitate pappus this species is a Lactuea, but the calix and 

 whole habit is that of Sonchus. 



A genus of more than 30 species, indigenous to both 

 hemispheres, existing variously, in Lapland, Tartary, Si- 

 beria, Kurope, Barbary, the Levant, Madeira, troplca'l Af- 

 rica, Jamaica and the Cape of Good Hope. S. oleraceus 

 makes its appearance in every quarter of the world. 



531. HIERACIUM. L. (Hawkweed.) 



Calix imbricate, ovate. Jieceptacle nearly na- 

 ked. Pappus simple, sessile, (pale yellowish 

 brown.) 



A polymorphous genus, producing scapes with 1 op 

 many-flowers, or leafy stems. Flov/ers generally yellow. 



Spzcizs. l.U.pusHlnm. In Labrador. 2. veiiostm. 3. 

 Gronovii. The variety rmdicaide of Michaux is remarkably 

 pilose, and appears to be a distinct species. 4. molle. 

 5. paniculattm. 6. Kalmii. H. canudense? Mich. //. t-n-- 

 gatum. Ph. 2. p. 503. 7. fasciculatum. Ph. 8. viariayiuvi. 

 If. scabvum. Mien, ^.prenanihoidea. IL macrophyllum? Ph. 

 In Canada. 



A genus of about 80 species, indigenous to Europe, 

 with the above exceptions, a sin^gle doubtful species at 

 the Cape of Good Hope, and a shrubby one in Madeira, 



532. BORKHAUSIA. LecandoUe, Moench, Spe- 

 cies of Crepis. i. 



C'a/io; caliciilate, at len.i^tb (in seed) sulcately- 

 costate, exterior scales or caiicle loose. Recep- 

 tack naked. Pappus stipitate. pilose. 



The other species of Crepis wiih a sessile psppus rre 



