aS 
Flowers about 4 inch across, or more. 
Leaves all of them quite entire, dull green, with hairs 
pressed close to the surface. } 
r 
Cheiran'thus Cheiri. Wallflower. 
Leaves (at least the lower) more or less toothed or Z 
lobed. } 
Bras'sica. 
~Flowers rarely over } inch across. 
All the leaves entire, or with distant, shallow teeth ;-~ 
f pod squarish in section. | q 
i Erysimum cheiranthoides. Zreacle Mustard. 
Leaves (at least the lower) deeply toothed or lobed. | 
Pods erect and directed close up against the 
( stem, the pods themselves rarely over ¢ inch 
long. 
ae downy, tapering from the base upwards, a 
| very short, stout stalks. 
L Sisym’brium officinale Hedge Mustard. 
‘Pods smooth, tapering near the top only, on 
slender stalks. ) 
L Bras'sica nigra. lack Mustard? 
‘Pods not pressed close up against the stem. 
Leaves entirely cut up into fine segments, or 
( with narrow lobes turned backward towards 
| the stalk; pod slender. 
| Sisym’brium. 
~Leaves not so divided or shaped. 
ee mostly divided nearly or quite to Mee 
| midrib, or coarsely toothed with ees 
wide fruit. Nastur’tium. 
\Leaves (at least the upper) not nearly divided 
to the midrib; pods usually over 1 inch. } 
Bras'sica murallis. 
GROUP II. 
cr Two adjacent petals, in‘some of the flowers, much | OB FS 
longer than the others; (fruit roundish). 
J 
Leaves nearly all in a rosette at the base of the plant ; p 
f fruit not winged. } ie 
Teesda/lia nudicau'lis. 
Stem leafy; fruit bearing a thin wing on either 
side. 
Ibe'ris amara. Candytuft. 
Flowers all regular, with the petals equal. 
