= sal a rte 
SYNGENESIA. HZQUALIS, 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, 
——_ » ue Spann? denticu pee . 
pecigs. 1. S. macrophyllus. 2. alpinus. 3. leucopheus. 
4. floridanus. 5. acuminatus. 6. pallidus. 7. arvensis, 8. 
oleraceus. Vhe 2 last introduced. ; 
9. * ludovicianus. WLeayes all runcinate, retrorsely and 
sharply toothed; peduncles and calix naked; panicle diva- 
ricate; flowers yellow; pappus conspicuously stipitate. 
Has. 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 the 
stipitate pappus this species is a Lactuca, 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, Europe, Barbary, the Levant, Madeira, tropical 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. Recepiacie nearly na- 
ked. Pappus simpie, sessile, (pale yellowish 
brown.) te 3 
A polymorphous genus, producing scapes with 1 or 
many-flowers, or leafy stems. Flowers generally yellow. “ 
Species. 1. H. pusillum. In Labrador. 2. venosum. 3. 
Gronovii. The variety nudicaule of Michaux is remarkably 
pilose, and appears to be a distinct species. 4. molle. 
5. paniculatum. 6. Kalmii. H. canadense? Mich. E. vir- 
gatum. Pu. 2. p. 503. 7. fasciculatem. Pa. 8. marianum. 
Hi. scabrum. Mich. 9. prenantheides. H. macrephylium? PR. 
In Canada. es 
A genus of about 80 species, indi ts to Europe. 
with the above exceptions, a° single § btft t 
the Cape of Good Hope, and a shrubby one in Madeira. 
532. BORKHAUSIA. Decandolle. Moench. Spe- 
cies of Crepis. L. 
Caliz caliculate, at length (in seed) sulcately- 
ostate, exterior scales or calicle loose. Recep- 
tacle naked. Pappus stipitate, pilose. 
: De ae ee sessile pappus are 
