BRASSICACEAE 563 
D ifid, the terminal segment the largest: 
sepals becomi ng 4.5-5 mm. long: petals 7-9 
mm. long: pod 10-16 mm. long. Vols Ln 
nigra L.]|—(BLACK-MUSTARD. CHARLOCK.) 
— Waste- | dos and fields, ind throughout 
cult. N. A. Nat. of Eu.—Spr.- 
2. B. juncea (L.) Cosson. Stem 3-17 an 
tall, glaucous, sparingly branched: leaves 
5-17 cm. long; blades of the age ones ellip; 
tic to oval, coarsely toothed or lyrate; 
pinnatifid: sepals becoming 4—6 mm. lon 
petals 9-12 m long: pod 30—50 mm. long.— 
(INDIAN-MUSTARD.)—Waste-places ru road- 
sides, nearly throughout eult. N. Nat.' 
of Asia.—Spr.— 
B. japonica Siebold. Similar to B. juncea in habit: leaves 6—21 cm. long: 
blades iau. lobed s b dn sepals om 4-5 mm. long: petals 7-9 
lon 0—40 . long.— (CURLED -MUSTARD. POTHERB-MUSTARD.)— 
Fields iid e Ta nod. provinees, Fla. to Me. Nat. of Asia.—Spr.— 
fall. 
4. B. campestris L. Stem 3—6 dm. tall, glabrous and uic yas 9-30 em. 
long, or -= e blades mie pinnatifid: sepals becoming 4—5 mm. long: 
petals 8-12 m ong: pod 3 ong.— (RUTA-BAGA. P -) Fields 
and qual eed tae Su N. A. Nat. of Eu.—Spr. 
DIPLOTAXIS DC. Annual, biennial, or perennial caulescent herbs. 
ia Made coarsely toothed or pinnatifid, sometimes lyrate. Sepals 4, rather 
na etals 4, ye ie ae blades broa Stamens 6: anthers oblong t 
linear. E short-columnar: stigma o slightly 2-lobed. Pod elon- 
gate, flattened, short- beaked. ad 20 species, natives of the Old World.— 
SAND-ROCKETS.—Spr.—fall. 
ma veal ovary, and pod, short-stipitate: flowers large; petals 1 cm. long 
1. D. tenuifolia. 
Plant : annus: ovary, and pod, not stipitate: flowers small; pet- 
als less than 1 cm. long. 2. D. muralis. 
1. D. bns: (L.) DC. Perennial, 3-12 dm. tall, the branches glabrous 
or nearly so: leaves ud cauline; blades conspicuously pinnatifid, the lobes 
usually narrow: sepals 5-7 mm. lon ng: pet 
10-12 mm. long: pod linear, s short: stile: 
iud i 1 mm. long.—(FLIx SAND- 
ROCKET. )—Waste-places and ballast about 
eit La. to N. S. Nat. of E 
2. D. muralis (L.) DC. Annual or biennial, 
1 
mostly 2 tall, the branches sometimes 
decumbent, sparingly pub leaves 
mostly near the base : bs plant; blades 
elliptic to spatulate, arsely Ec nnately 
toothed to somewhat Dinne£ifid sepals 3.5— 
m. T od 
rowly linear, not stipitate: seed less than 
1 mm. long.—( CROSS-WEED. ALL-ROCKET. 
Y 
—_Waste-places and ballast, usually about sea-ports, various provinces, La. to 
Ont. and N.S. Nat. of Eu. 
