24 THE CRUCIFER FAMILY. 



i Pod at least 3 or 4 times as long as broad (SILIQ.UOS.S) 8 



\ Pod not 3 times as long as broad (SiLicuLOS/E) . .... 14 



a RriinnnJ Flowers white, purple, or red (never yellow) .... 4 



( Flowers yellow 10 



( Petals large, on long claws, purple or rarely white. Stigmas 2, very short, 



4< erect and parallel . . . i 6 



( Petals small, or the claws scarcely longer than the calyx. Stigma entire . 4 



{Leaves hoary and soft Stigmas thickened at the base. (Radicle ac- 

 cumbent) l. MATTHIOLA. 

 Leaves green, with coarse hairs. Stigmas not thickened. (Radicle in- 

 cumbent) 7. HESPBRIS. 



fi / Leaves all undivided 7 



I Leaves, at least the lower ones, pinnate 8 



- i Leaves all stalked, large and broad 9. ALLIARIA 



\Upperleavessessileorauricled 6. ARABIS 



( Seeds in two distinct rows in each cell. Pod rather short and curved. 



S< 4. NASTURTIUM. 



( Seeds blended into one row in each cell. Pod straight, long, or slender . 9 



/ Stem-leaves undivided, narrowed at the base 5. ARABIS. 



* \ Loaves all pinnate or divided 6 CARDAMINK. 



I 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 ".obed at the base. 

 Plant glabrous, or hairy with rough or spreading hairs . . . .12 



t .f 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 13 



I Radicle incumbent. Valves of the pod opening to close under the stigma. 

 12< Plant hairy or glabrous, the leaves deeply pinnate . . 8. SlSYMBRlUlt 

 I Radicle conduplicate. Pod ending in a beak or conical style, 1 to 6 

 lines long. Leaves irregularly pinnate, or lyrate, or the upper ones un- 



V divided 11. BRASSICA. 



.~ ( Pods not 6 lines long, on slender spreading pedicels . . .4. NASTURTIUM. 

 \ Pods an inch or more, on stiff short pedicels .... 3. BARBAREA. 

 /'Pod globular or oblong, or compressed. The valves flat or 



14 R Tir>nTnajJ couvex, parallel to the broad partition 16 



| Pod compressed or flattened laterally, at right angles to the 



narrow partition. The valves boat-shaped .... 22 



.. f Pod nearly globular or cylindrical 16 



\ Pod evidently compressed or flattened 20 



./ Minute aquatic plant with subulate leaves . . . . 16. SUBULARIA. 



10 \ Terrestrial plants with flattened leaves 17 



.,/ Flowers white. Radicle accumbent 18 



11 \ Flowers yellow 19 



{Plant glabrous. Pod globular or shortly ovoid . . . .12. COCHLFARIA. 

 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. 

 i\>< Leaves linear, in dense radical tufts. Flower-stem leafless . . 14. DRABA. 

 Leaves entire or toothed, the upper ones aurioled and clasping the stem. 



I. (Radicle incumbent) 15. CAMKLINA. 



( Petals deeply divided. (Dwarf annual) 14. DRABA. 



/u | Petals entire or notched 21 



21 I Pod nearly orbicular 13. ALYSSUM. 



Pod considerably longer than broad 14. DRABA. 



( Two or more seeds in each cell of the pod 23 



" ( One seed only in each cell 27 



, / leaves entire . . 24 



M \Leaves more or less pinnate 25 



( Pod winged all round. (Radicle accumbent) .... 17. TIILASPL 

 *4-(Pod obcordate or wedge-shaped, not winged. (Radicle Incumbent) 



21. CAPSELLA. 



,. / Two seeds in each cell 26 



"* t Many seeds ia each cejL CRadicle incuaibcrW , . 



