70 CRUCIFEKjE. (jtUSTARD FAMILY.) 



what toothed; pods nearhj erect on va-y short pedicels, elongated (3'-4' long), ex- 

 actly 4-sided ; stigma 2-lolied. — Ohio (on limestone clitls) to Illinois, and 

 southwestward. June, July. — Plant stout, l°-2° high; the erowded bright 

 orange-yellow flowers as large as those of the Wall-flower. Petals orbicular, 

 on very slender claws. 



8. SISYMBRIUM, L. Hedge Mustakd. 



Pod terete, flattish, or 4 - 6-sided ; the valves 1 - 3-nen'ed. Seeds oblong, 

 marginlcss. Cotyledons incumbent. Calyx open. — Tlowers small, white or 

 yellow. (An ancient Greek name for some plant of this family.) Ours are 

 annuals or biennials. 



1. S. officinIle, Scop. (Hedge Mustakd.) Leaves runcinate ; flowers 

 very small, pale yellow; pods awl-shaped, close pressid to the stem, scarcely 

 stalked. — Waste places. May - Sept. — An unsightly branched weed, 2° - 3° 

 high. (Nat. from Eu.) 



2. S. ThaliXna, Gaud. (Mouse-eae Cre.ss.) Leaves obovate or oblong, entire 

 or barely toothed ; flowers white ; pods linear, somewhat 4-sided, longer than 

 the slender spreading pedicels. (Arabis Thaliana, L. ; the plant resembles A. 

 lyrata.) — Old fields and rocks, Massachusetts to Kentucky. April, May. — 

 A span high, slender, branched, hairy at the base. (Nat. from Eu.) 



3. S. ean6seens, Nutt. (Tansy Mustard. ) Leaves 2-pinnatifiil, often 

 hoaa'y or downy, the divisions small and toothed ; floi\'ers yellowish, very 

 small ; pods in long racemes, oblong-club-shaped or oblong-linear, shorter than 

 their mostly horizontal pedicels ; seeds 2-ranhed in each cell. — Penn. and New 

 York (Lucifer Falls, Tompkins Co., .7. W. Chickering) to Lake Superior, thence 

 southward and westward. June -Aug. 



S. Sophia, L., with slender linear pods nearly erect on ascending pedicels, 

 and one-ranked seeds is nat. from Eu. in Canada East. — S. incisuji, Engelm., 

 differing only in the shorter pods widely spreading on horizontal pedicels, is wild 

 beyond the Mississippi. 



9. BRASSICA fBrassica and Sinapis), Toum. 



Pod linear or oblong, nearly terete or 4-sided, with a stout 1-seeded beak or a 

 rigid style ; valves 1 - .5-nerved. Seeds globose, one-rowed. Cotylnliins incum- 

 bent, folded around the radicle. — Annuals or biennials, with yellow flowers. 

 Lower leaves mostly lyrate, incised, or pinnatifid. (The Latin name of Cab- 

 bage. Sinapis is the Greek 'S.ivaTn, which is said to come from the Celtic nap, 

 a turnip.) 



1. B. SixApfSTKUM, Boissier (or Sikapis AEvtNsis, L., the English Cn.vn- 

 lock), with knotty pods, fully one third occupied by a stout 2-edged beak 

 (which is either empty or one-seeded), the upper leaves barely tiKjthed, is a 

 noxious weed in grain-fields, from Pennsylvania and New York westward. 

 (Adv. from Eu.) 



2. B. (or Sin'Api.9) Alba. (White Mustabd.) Pods bristly, a.^cending on 

 spreading pedicels, more than half its length occupied by the sword-shaped one- 

 seeded beak; leaves all pinnatifid; seeds pale. (Cult, and adv. from Eu.) 



