SYNGENESIA. ^qCALIS. 125 



In this g'enus there are 4 shrubby species, the rest are 

 herbaceous, several attain a cons:dera[)le magnitude, pro- 

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

 pinnatifid, or spinulosely denticulated. 



Species. 1. S. 7)iacrf/phift.lus. 2. alfnnus. 3. leucophaus. 

 A.floridanus- 5. acnminatns. 6. pallidus. 7- arvensis. 8, 

 o'eraceus The 2 last iniroduced. 



9. * ludoviciarinh-. Leaves all runciiiate, retrorsely and 

 sliarply toothed; perl uncles and culix nuked; panicle diva- 

 ricate; flowers yellow; pappus consp;ciK>usly stipitale. 

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

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

 3 to 5 feet high; stem leaves scmiamplcxicaule. By the 

 stipi(ale pappus this species is a Lactuca^ but the calix and 

 whole habit is that of SoncUiis. 



A genus of more than 30 species, indig-enotis to both 

 hemispheres, existinj^ variously, in Ivapiand, Tartary, Si- 

 beria, Kuiope, Barbary, the Levant, Madeira, tropical Af- 

 rica, Jamaica and the Cape of (iood Hope. S. oleraceus 

 makes its aj)pearunc€ in every quarter of the world. 



531. HIERACiUxM. L. (Ha\^ k\vee(L) 



Calix imbricate, ovate. Beceptack nearly na- 

 ked. Papyiis simple, sessile, (pale yeliowisii 

 brown.) 



A polymorphous g-ejiu.<;, producing- scapes with 1 or 

 many-fiowers, or leafy stems. Flowers generally yellow. 



Species. l.W. pusiUwi. In Labrador. 2. venosum. 3. 

 Gronovii. The variety nwYfica7ffe of Michaux is remarkably 

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

 3. pa?iicidatum. 6. Kahnii. U canadense? Mich. H. vir' 

 gatum. Ph. 2. p. 5'J3. 7. fascicidatum. Ph. ^. marianuin. 

 H. scaOrutn. Mich. 9. prenanthoides. H. macrophyllum? Ph. 

 In Canada. 



A genus of about 80 species, indigenous to Kurope, 

 with the above exceptions, u single floubtful species at 

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



53^. BORKHAUSIA. JUecandolle. .^loencL Spe- 

 cies of C KEPIS. L, 



Calix caliculate, at length (in seed) sulcately- 

 costate, exterior scales or calicle loose. Recep- 

 tacle naked. Pappus stipitate. pilose. 



The other species of Crcpi:: with a sessile pappus ure 

 L 2 



