24 THE CRUCIFER FAMILY. 
Pod at least 3 or 4 times as long as broad (SILIQUOS™) : , : “18 
Pod not 3 times as long as broad tS ereen ae ean é : : a, ee 
Flowers white, purple, or red (never yellow : ‘ : hee 
8 SILIQUOSE | Flowers yellow : : . 10 
Petals large, on long claws, purple or rarely white. Stigmas 2, very short, 
erect and parallel 
Petals small, or the claws scarcely toner than the calyx. Stigma entire . 6 
Leaves hoary and soft. Stigmas thickened at the base. (Radicle ac- 
a ,cumbent) . : : : ; ‘ . 1. MATTHIOLA. 
Leaves green, with coarse hairs. pease not thickened. (Radicle in- 
cumbent) . ; : ; : f ‘ ; 7. HESPERIS, 
gj Leaves all undivided. ; ; : : ; , Pre. | 
\ Leaves, at least the lower ones, pinnate ‘ : ; : ; : : yay 
” Leaves all stalked, large and broad. . : ' ; , 9. ALLIARIA 
Upper leaves sessile or auricled . 5. ARABIS 
Seeds in two distinct rows in each. cell. Pod rather short and curved. 
4, NASTURTIUM. 
Seeds blended into one row in each cell. Pod straight, long, or slender pi 
9 f Stem-leaves undivided, narrowed at the base. : ‘ >. & ae 
\ Leaves all pinnate or divided . 6 CARDAMINE. 
All the leaves entire, or toothed only. Plant pale or hoary, with minute 
appressed hairs : 11 
= Leaves, at least the lower or radical ones, pinnate or lobed at the ‘base. 
Plant glabrous, or hairy with rough or spreading hairs 
W { Pod flattened. Radicle accumbent . ‘ : 2. CHEIRANTHUS. 
Pod nearly quadrangular. Radicle incumbent . 10. ERYSIMUM. 
Radicle accumbent. Pods ending in a style seldom above a line along. 
- Plant glabrous, with lyrate or ‘pinnate leaves 
Radicle incumbent. Valves of the pod opening to close under the stioma. 
12 Plant hairy or glabrous, the leaves deeply pinnate. aS - SISYMBRIUM, 
Radicle conduplicate. Pod ending in a beak or conical style, 1 to 6 
lines long. Leaves irregularly pinnate, or Te or the upper ones un- 
divided , 4 11. BRASSICA. 
13 { Pods not 6 lines long, on slender spreading pedicels . 2 : . 4 NASTURTIUM. 
Pods an inch or more, on stiff short pedicels. : 3. BARBAREA. 
Pod globular or oblong, or compressed. "The valves flat or 
convex, parallel to the broad partition . 15 
14 8 LICULOSE# Pod compressed or flattened laterally, at right angles to the 
narrow partition. The valves boat- shaped : : 3 . 22 
1b { Pod nearly globular or cylindrical : ; , ; : ‘ : Wd 
Pod evidently compressed or fiattened : 5 : 20 
16 { Minute aquatic plant with subulate leaves . ; : : ’ . SUBULARIA. 
Terrestrial plants with flattened leaves ; : ‘ 17 
17 { Flowers white. Radicle accumbent . 3 : : : : : 4 ioks 
Flowers yellow ; , . , ‘anya 
Plant glabrous. Pod globular or shor tly ovoid . oe " COCHLEARIA, 
18} Plant hoary or rough with short hairs. Pod somewhat flattened or oblong 
13. ALYSSUM. 
Leaves pinnately lobed, or, if entire, narrowed at the base. (Cotyledons 
accumbent) . : : : : ¢ . 4. NASTURTIUM. 
194 Leaves linear, in dense radical tufts. Flower- stem leafless. . 14. DRABA. 
Leaves entire or toothed, the upper ones auricled and ise ie stem. 
(Radicle incumbent) , : . ; : 
90 ( Petals deeply divided. (Dwarf annual) ; : : : : : . DRABA. 
( Petals entire or notched , : : : ‘ ; ; ADT 
21 { Pod nearly orbicular . 5 ‘ : : "13, ALYSSUM. 
Pod considerably longer than broad. : ; ; , : . 14. DRABA. 
99 { Two or more seeds in each cell of the Pett , : t : , F ; yi 23 
One seed only in each cell . . ; 3 ; , ats! —s 
23 { Leaves entire . : : : : : : ; : s . 24 
Leaves more or less pinnate : : : : : 25 
Pod winged all round. (Radicle accum bent) : "17. "THLASPI. 
244 Pod obcordate or wedge-shaped, not winged. (Radicle incumbent) 
21. CAPSELLA. 
95 tite seeds in each cell . : : ' i : ‘ : : 2 oe 
Many seeds in each cell. (Radicle incumbent) . Ropes ; 21, CAPSELLA. 
