SPECIES AND VARIETIES. 273 



minal lobe and smaller literal ones, all pointed and coarsely- 

 toothed, the upper leaves small, less cut, embracing the stem 

 by pointed auricles ; flower-heads in closely-sessile clusters of 

 two or three along the stiff, spreading branches, the florets 

 large, bright blue. Succory. Dry wastes, roadsides, and 

 borders of fields. PL July, August. 



(171) Sonclms. SOWTHISTLE. 



S. arvensis : stems 2-3 feet high ; leaves long, runcinately- 

 pinnatifid or sinuate, the lobes lanceolate or triangular, bor- 

 dered by small prickly teeth, the upper ones clasping the stem 

 with short broad auricles ; flower-heads large, bright yellow, 

 in loose terminal panicles, the branches, peduncles, and invo- 

 lucres more or less hispid with brown or black glandular hairs. 

 A cornfield weed. PL August. 



S. oleraceus : annual ; stem thick, hollow, 1-4 feet high, 

 glabrous ; leaves thin, pinnatifid, with a broad, heart-shaped 

 or triangular terminal lobe, bordered with irregular, pointed 

 or prickly teeth, and a few smaller lobes or coarse teeth along 

 the broad leafstalk, the upper leaves narrow and clasping the 

 stem with short auricles ; flower-heads rather small, pale yel- 

 low, in a short corymbose panicle, sometimes almost umbellate. 

 A weed of cultivation. PL June to August. 



Var. aspera : leaves darker, less divided, but much more 

 closely bordered with prickly teeth ; clasping auricles broader, 

 rounded, and more prickly toothed. 



(172) Crepis. HAWK'S-BEARD. 



C. virens : annual or biennial ; stems erect or ascending, 

 1-3 feet high, glabrous or nearly so; leaves linear or lanceo- 

 late, toothed or pinnatifid, with triangular or narrow, but short 



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