MUSTARD FAMILY. Cruciferas. 



A bright yellow-flowered species with a 

 Yellow Rocket 



or Winter Cress simple stem terminated by one or more 

 Barbarea vul- showy spikes of flowers beneath which the 

 garis long curved seed-pods later appear in a 



Yellow loose cluster. Upper leaves stemless, 



April-May 1 . ,. . . 



lower ones cut m usually five divisions, the 



terminal one very large ; all deep shining green. The 

 pretty four-petaled flowers with six stamens four of 

 which are quite prominent, are frequently visited by the 

 early bees and handsome flies of the genus Syrphidce. 

 They yield honey and pollen. 1-2 feet high. In moist 

 places along the road, and in meadows. Me. , south to 

 Va. , and west. Naturalized from Europe, but indigenous 

 in the west. 



A homely straggling weed with tiny 

 Hedge Mustard 



Sisymbrium " h * yellow flowers, and light green,, 

 offidnale smooth leaves, with 3-6 lobes, irregularly 



Light yellow blunt-toothed. The generally smooth stem 

 May-Septem- with tall w i^ely spreading, wiry branches, 

 tipped with a few flowers and curiously 

 set with the close-pressing pods. 1-3 feet high. In 

 waste places throughout our range. Naturalized from 

 Europe. 



Charlock or A coarse and vexatious weed in culti- 



Field Mustard vated fields and waste places, adventive 

 Brassica from the old countiy> an( j widely distrib- 



Yellow uted through the northern States. The 



May-Septem- light yellow flowers over -|- inch broad, in 

 her small terminal clusters. The leaves ovate 



with few if any lobes, indistinctly or sparsely toothed, 

 with short stems or none at all. The seed-pods f-inch 

 long, contracted between the seeds, and lumpy in con- 

 tour. 1-2 feet high. Me., west to Neb. and S. Dak., 

 and south. 



Another common weed in grain fields, 

 Black Mustard 11-1,1 -11 



Brassica nigra and beslde the road ' A more Wlde1 ^ 

 Yellow branched plant than the preceding, and 



June Septem- with far more deeply lobed leaves ; one 

 ber terminal large division, and generally four 



lateral ones, all finely toothed. The small pure light 

 yellow flowers less than -J inch broad are frequently 



