5. CRUCIFERAE. 
17 
dissepiment and bursting by 2 valves, rarely 1-celled and inde- 
hiscent, 1-many-seeded. — Herb, rarely shrubby, sulpburously 
fetid in decay, antiscorbutic and stimulant, never poisonous. L. 
alternate. FI. y. and white, more rarely purple or violet. 
Suborder I. SILIQUOSiE. 
Pod long and narrow, with 2 valves opening longitudinally, 
and 2 cells separated by a long narrow linear spurious dissepi- 
ment. 
Tribe I. ARABIDEJE. 
Seeds flattened or compressed, often bordered, their cotyledons 
accumbent parallel to the dissepiment of the pod ; radicle lateral 
applied to their edges. 
1. Matthiola. Pod linear round or compressed. Stigma 
2-lobed, lobes erect or converging, gibbous or homed at the 
back. 
2. Cheiranthus. Pod linear quadrangular or compresso- 
quadrangular 2-edged, with a prominent longitudinal nerve 
or keel along the back of each valve. Stigma 2-lobed, 
lobes spreading or recurved. Seeds in a single row in each 
cell. 
3. Nasturtium. Pod rather short thick and swollen round- 
ish-tapering or elliptic; valves convex almost nerveless. 
Stigma capitate. Seeds irregularly in 2 rows in each cell. 
f4. Barbarea. Pod linear roimd or subquadrangular ; valves 
convex with a subprominent longitudinal nerve. Stigma 
capitate obtuse entire or notched. Seeds in a single row 
in each cell. 
5. Arabis. Pod linear compressed ; valves flattish with a 
more or less prominent longitudinal nerve, or nerveless 
with several longitudinal veins. Stigma obtuse. Seeds 
in a single row in each cell. 
G. Card amine. Pod linear or lanceolate-linear compressed ; 
valves flat nerveless. Stigma capitate. Seeds in a single 
row in each cell, their funicle simple filiform. 
Tribe II. SISYMBREsE. ' 
Seeds ovate or oblong not bordered. Cotyledons incumbent 
contrary to the dissepiment, radicle dorsal applied to their 
back. 
7 Sisymbrium. Pod linear round rarely quadrangular ; 
valves convex with 3 longitudinal nerves. Stigma obtuse 
entire. Seeds in a single row in each cell, smooth ; their 
