/ELLOW 



This plant is extensively cultivated in Europe, its ground 

 seeds forming the well-known condiment. The ancients used it 

 for medicinal purposes. It has come across the water to us, and 

 is a troublesome weed in many parts of the country. 



WILD RADISH. 



Raphanus Raphanistrmn. Mustard Family. 



One to three feet high. Leaves. — Rough ; lyre-shaped. Flowers. — Yel- 

 low ; veiny ; turning white or purplish ; larger than those of the black mus- 

 tard, otherwise resembling them. Pod. — Often necklace-form by constric- 

 tion between the seeds. 



This plant is a troublesome weed in many of our fields. It is 

 the stock from which the garden radish has been raised. 



YELLOW WATER-CRESS. 



Nasturtium palustre. Mustard Family. 



Erect, branching, one to three feet high. Leaves. — Pinnately parted 

 into oblong, toothed lobes. Flowers. — Yellow, small, growing in racemes. 

 Pod. — Linear or oblong, spreading or curved. 



The yellow water-cress is common in wet places or in shallow 

 water almost throughout North America. Its insignificant yellow 

 flowers are found from May till September. 



RATTLESNAKE-WEED. HAWKWEED. 



[PI. LXII. 

 Hieracium venosum. Composite Family. 



Stem or Scape. — One to two feet high ; naked or with a single leaf ; 

 slender ; forking above. Leaves. — From the root ; oblong ; often making 

 a sort of flat rosette ; usually conspicuously veined with purple. Flower- 

 heads. — Yellow ; composed entirely of strap-shaped flowers. 



The loosely clustered yellow flower-heads of the rattlesnake- 

 weed somewhat resemble small dandelions. They abound in the 

 pine-woods and dry, waste places of early summer. The purple- 

 veined leaves, whose curious markings give to the plant its com- 

 mon name, grow close to the ground and are supposed to be 



144 



