442 DESCRIPTIONS OF NEW SPECIES 



ours a stout perennial, with large deeply peneti-ating roots: very smooth and sometimes glaucous ; 

 the panicle spreading, not racemose. Flowers as large and showy as those of Cichorium Intybus. 

 Nearly allied to the preceding, which, however, appears to have different leaves, but with the fruit 

 very similar. 



1 1 Flowers blue or 7v}iite; acheniwn shortly acuminate. 



Mulgedium acuminatum. Sonchus acuminatus, Willd. Achenium pale and 

 spotted, with a tumid margin and two or three striae on either side. 



Mulgedium * divaricatum; branch leaves sessile, somewhat runcinately pin- 

 natifid with wide and shallow denticulated segments; panicle divaricate, naked; 

 involucrum subcampanulate, caliculate; achenium with a short, conformable 

 rostrum, transversely rugulose, with about three elevated central striae on either 

 side; pappus white. 



Hab. Louisiana. (Mr. Trudeau.) The flower appears to have been blue or white ; segments 

 of the caliculum lanceolate. Braetes of the very divaricate panicle minute, distant, and subulate. 

 Apparently a very distinct and genuine species of the present genus. 



§. Leucomela. — With the pappus graij ; florets nearly half way tubular; anthers 

 bisetose at the base. Achenium transversely rugose, merely attenuated at the 

 summit, with three ribs on one side and four or five on the other; flowers white, 

 with a tinge of purple. 



Mulgediuin leucophceum, Decand., Vol. VII., p. 250. 



*GALATHENIUM. 



{Lactuca and Mulgedium species of authors.) 



Mulgedium, but with the achenium elliptic and flatly compressed, transversely 

 rugulose, with a broad and thin opaque margin, the centre on either side 

 marked with one to three slender striae; the rostrum distinct, abrupt, shorter 

 than the achenium, ending in a circular disk with a pubescent margin. 

 Pappus white, slender and slightly scabrous, in several series. — North Ame- 

 rican plants, usually perennial, with the habit of Lactuca or Sonchus; the 

 flowers yellow or blue; the achenium black. — (The name from ya2.ady;vos, 

 milky, in allusion to the milky properties of the plants, and also their alli- 

 ance with Lactuca.) 



