Von. II.J MUSTARD FAMILY. 119 
3. Brassica arvénsis (L.) B.S.P. 
Charlock. Wild Mustard. 
(Fig. 1703.) 
Sinapis arvensis I,. Sp. Pl. 668. 1753. 
Brassica Sinapistrum Boiss. Voy. Espagne, 2: 
39- 1839-45. 
Brassica arvensis B.S.P. Prel. Cat. N. Y. 1888. 
Erect, 1°-2° high, hispid with scattered 
stiff hairs, or glabrate, branching above. 
Leaves similar to those of 2. xigra but gen- 
erally not so much pinnatifid; flowers 6//— 
8’ broad; pedicels stout, 2’’-3’’ long in fruit; 
pods glabrous, spreading or ascending, some- 
what constricted between the seeds, 6’/-8/’ 
long, 1’ wide, tipped with a flattened elon- 
gated-conic often 1-seeded beak 5/’-6’’ long, 
the valves strongly nerved. 
In fields and waste places, frequent or occa- 
sidnal. Adventive from Europe and widely dis- 
tributed asa weed. English names, Corn Mus- 
tard, Chadlock, Corn- or Field-Kale. May- 
Nov. 
4. Brassica campéstris L. 
Turnip. Wild Navew. 
(Fig. 1704.) 
Brassica campestris I, Sp. Pl. 666. 1753. 
Stem 1°-3° high, branching, glabrous 
and glaucous, or sometimes slightly pubes- 
cent below. Lower leaves petioled, pu- 
bescent, 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, 
glabrous; flowers bright yellow, 4//-5/’ 
broad; pedicels spreading or ascending, 
often 1/ long in fruit; pods 114/-27 long, 
tipped with a beak 4’/-5’’ long. 
In cultivated grounds, sometimes persist- 
ing for a year or two, and occasional in waste 
places eastward. Fugitive from Europe. 
April-Oct. 
Brassica Napus I,. (RAPE) has all the leaves 
glabrous, and is sometimes found in waste 
places, 
13. DIPLOTAXIS DC. Syst. 2: 628. 1821. 
Annual or perennial herbs, similar to the Mustards, with basal and alternate pinnatifid 
or lobed leaves, and rather large yellow flowers in terminal racemes. Silique elongated, 
linear, flat or flattish, short-beaked or beakless, the valves mostly 1-nerved. Style usually 
slender. Seeds in 2 complete or incomplete rows in each cavity of the silique, marginless; 
cotyledons conduplicate. [Greek, referring to the double rows of seeds. ] 
About 20 species, natives of the Old World, the following fugitive or adventive in our territory. 
The genus is often united with Brassica. 
Perennial; stem leafy nearly to the inflorescence. 1. D. tenutfolia, 
Annual; leaves mostly basal, oblanceolate. 2. D. murals. 
