~ 41. 



i. Brassica nigra (L.) Koch. Black 

 Mustard. Fig. 2105. 



;ra L. Sp. PL 668. 1753. 

 . ; ;ca ttigra Koch, in Roehl, Deutsche FL 



4:713- 1833- 



nual, erect, 2-/ high, freely and 

 ranching, pubescent or glabrate. 

 .r leaves slender-petioled, deeply pin- 

 d, with I terminal large lobe and 2-4 

 ler lateral ones, dentate all around; 

 upper leaver shorter-petioled or sessile, pin- 

 d or dentate, the uppermost reduced to 

 olate or oblong entire blades; flowers 

 low, 3"-5" broad; pedicels slen- 

 der, appresfed. 2" long in fruit; pods nar- 

 :-sided, s"-/" long, \" wide, 

 appressed against the stems and forming 

 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 

 Europe, Native also of Asia. Cadlock. 

 :ck. Kerlock. Scurvy-senvie. June-Xov. 



MUSTARD FAMILY 



3. Brassica campestris L. Turnip. 

 Wild Xavew. 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"--," long. 



In cultivated grounds, sometimes persisting 

 for a year or two, and occasional in waste 

 places eastward. Fugitive from Europe. Sum- 

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

 seed. April-Oct. Consists of many races. 



2. Brassica juncea (L.) Cosson. Indian 

 Mustard. Fig. 2106. 



Sinapis juncea L. Sp. PI. 668. 1 753. 



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-pinnatind 

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

 most sessile or nearly so, lanceolate or linear, 

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

 wide; fruiting racemes sometimes i long; pods 

 erect or nearly so, on slender ascending pedicels 

 3"~5" 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. Adventi.ve or 

 naturalized from Asia. May-July. 



