as 
CRUCIFERS. (MUSTARD OR RADISH FAMILY.) 
4-elded, pointed with a short taper style; stigma 2-lobed. — Central 
Ohio, on limestone cliffs, SuUivant. (Illinois, Geyer , Dr. Meade.) 
June, July.—Plant stout, l°-2° high, with a crowded raceme of 
showy bright orange-yellow flowers as large as the Wall-flower. Pods 
SP - 4' long, straight. 
9. SISYMBRIUM, L. Hedge Mustard. 
Pod terete or rather 4 - 6-sided ; the valves 1 - 3-nerved. Seeds 
in a single row in each cell, oblong, marginless. Calyx open.— 
Flowers small, white or yellow. (An ancient Greek name for 
some plant of this family.) 
1. S. officinale. Scop. (Hedge Mustard.) Leaves runci 
note ; flowers very small, pale yellow ; pods close pressed to the stem, 
awl-shaped , scarcely stalked, d)— Waste places, introduced. M a y' 
Sept. — An unsightly branched weed, 2° high. 
2. S. Thalia nil m. Gaud. (Mouse-ear Cress.) Leaves o- 
ovate or oblong , entire or barely toothed; flowers white ; pods inear ’ 
somewhat 4-sided, longer than the slender spreading pedicels. 
Old fields and rocks, Wew York and Penn. Probably introduce • 
May. — A span high, slender, branched, hairy at the base. 
3. S. canescens, Nutt. (Hoary Hedge Mustard.) Leaves 
2-pinnatiJid, the divisions small and toothed; flowers whitish; P° 
in long racemes, oblong or rather club-shaped, not longer than, 
spreading pedicels. (l) —Ohio and westward. — Slender, 1 'o ’ 
often hoary pubescent. Flowers very small. 
Tribe III. BRASSIciLE. The Cabbage Tribe- 
lO. SIXAPIS, Toum. Mustard. 
Pod nearly terete, with a short beak ; the valves 3 - 5 -(rarely 1') 
nerved. Seeds globose, one-rowed. Cotyledons folded aroun 
the radicle. Calyx open. — Annuals or biennials, with y ell °^ 
flowers. Lower leaves lyrate, incised, or pinnatifid. (Gree' 
name 2*Wi, which is said to come from the Celtic nap , a turnip-) 
1- S. alfm, L. (White Mustard.) Pods bristly , turgid, 01 
spreading pedicels, shorter than the si.cord-shaped beak ; leaves all pm* 
natifid. — Cultivated ; sometimes spontaneous in old fields. 
2. arvensis, L. (Field Mustard. Charlock.) f 0 
smooth , knotty, about thrice the length of the conical 2-edged beak ; U P' 
per leaves merely toothed.— A noxious weed in fields, W. 
York, thoroughly naturalized. 
3. S. nigra, L. (Black Mustard.) Pods smooth, i-cornerd 
{the vahes 1 -nerved only) oppressed to the stem, tipped with a slender 
