GENUS 41. 



MUSTARD FAMILY. 



i. Brassica nigra (L.) Koch. Black 

 Mustard Fig. 2105. 



Sinapis nigra L. Sp. PI. 668. 1753. 



Brassica nigra Koch, in Roehl, Deutsche Fl. 



Ed. 3,4:713- 1833. 



Annual, erect, 2-7 high, freely and 

 widely branching, pubescent or glabrate. 

 Lower leaves slender-petioled, deeply pin- 

 natifid, with I terminal large lobe and 2-4 

 smaller lateral ones, dentate all around; 

 upper leaves shorter-petioled or sessile, pin- 

 natifid or dentate, the uppermost reduced to 

 lanceolate or oblong entire blades ; flowers 

 bright yellow, 3 "-5" broad ; pedicels slen- 

 der, appressed, 2" long in fruit ; pods nar- 

 rowly linear, 4-sided, 5"-7" long, \" wide, 

 appressed against the stems and forming 

 very narrow racemes ; beak slender, i"-2 ' 

 long; seeds dark brown. 



In fields and waste places, common through- 

 out our area, except the extreme north, west to 

 the Pacific Coast. Bermuda. Naturalized 

 from Europe. Native also of Asia. Cadlock. 

 Warlock. Kerlock. Scurvy-senvie. June-Nov. 



2. Brassica juncea (L.) Cosson. Indian 

 Mustard. Fig. 2106. 



Sinapis juncea L. Sp. PI. 668. 1753. 



B. juncea Cosson, Bull. Soc. Bot. Fr. 6: 609. 1859. 



Annual, pale, glabrous, or slightly pubescent, 

 somewhat glaucous, stem erect, usually stout, 

 i-4 tall. Lower leaves runcinate-pinnatifid 

 and dentate, long-petioled, 4-6' long, the upper- 

 most sessile or nearly so, lanceolate or linear, 

 commonly entire, much smaller ; flowers 6"-o," 

 wide; fruiting racemes sometimes i long; pods 

 erect or nearly so, on slender ascending pedicels 

 3"-S" long, not appressed to the axis, i'-2' long, 

 more than i" wide, the conic-subulate beak one- 

 fourth to one-third the length of the body. 



In waste places, New Hampshire to Pennsylva- 

 nia, Michigan, Kansas and Virginia. Adventive or 

 naturalized from Asia. May-July. 



3. Brassica campestris L. Turnip. 

 Wild Navew. Fig. 2107. 



Brassica campestris L. Sp. PI. 666. 1753. 

 Brassica Rapa L. Sp. PI. 666. 1753. 



Biennial; stem i-3 high, branching, 

 glabrous and glaucous, or sometimes slightly 

 pubescent below. Lower leaves petioled, 

 pubescent, more or less lobed or pinnatifid ; 

 upper leaves lanceolate or oblong, acute or 

 obtusish, sessile and clasping the stem by 

 an auricled base, entire or dentate, gla- 

 brous ; flowers bright yellow, 4"-S" broad ; 

 pedicels spreading or ascending, often i' 

 long in fruit; pods ii'-2' long, tipped with 

 a beak 4"-s" long. 



In cultivated grounds, sometimes persisting 

 for a year or two, and occasional in waste 

 places eastward. Fugitive from Europe. Sum- 

 mer-rape. Nape. Bergman's-cabbage. Cole- 

 seed. April-Oct. Consists of many races. 



