24 THE CRUCIFER FAMILY. 



/Pod at least 3 or 4 times as long as broad (SiLlQUOS^E) 8 



\ Pod not 3 times as long as broad (SiLicuLOSiE) . .... 14 



if Tmrr> v j Flowers white, purple, or red (never yellow) .... 4 



3 SILIQUOSA. | Flowers yellow * e * t ' lo 



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



4 < erect and parallel ... 6 



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



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

 cumbent) 1. MATTHIOLA. 

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

 cumbent) 7. HESPERIS. 



fi / Leaves all undivided 7 



1 Leaves, at least the lower ones, pinnate 8 



7 / 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. 

 8-^ 4. NASTURTIUM. 



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



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



v \ 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 '*obed at the base. 

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

 Pod flattened. Radicle accumbent 2. CHBIRANTHUS. 

 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 

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

 Plant hairy or glabrous, the leaves deeply pinnate . . 8. SISYMBRIUM. 

 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- 

 divided 11. BRASSIOA. 



,o /Pods not 6 lines long, on slender spreading pedicels . . . 4. NASTURTIUM. 

 \ Pods an inch or more, on stiff short pedicels .... 3. EAR BARE A. 



(Pod globular or oblong, or compressed. The valves flat or 

 convex, parallel to the broad partition 15 

 Pod compressed or flattened laterally, at right angles to the 

 narrow partition. The valves boat-shaped . 22 



17 



18 



19- 



Poil nearly globular or cylindrical 

 Pud evidently compressed or flattened 

 Minute aquatic plant with subulate leaves . 

 Terrestrial plants with flattened leaves 



Flowers white. Radicle accumbent 



16 

 20 



10. SUBULARIA. 

 17 

 18 



Flowers yellow 19 



Plant glabrous. Pod globular or shortly ovoid . . . .12. COCHLEARIA. 

 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. 



Leaves linear, in dense radical tufts. Flower-stem leafless . . 14. DRABA. 

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



(Radicle incumbent) 15. CAMELINA. 



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



Petals entire or notched 21 



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 



a- , Leaves entire ... 24 



\Leavesmoreorlesspinnate 25 



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

 24 > Pod obcordate or wedge-shaped, not winged. (Radicle incumbent) 

 ( 21. CAPSELLA. 



,: /Two seeds in each cell 26 



* \Mauy seeds iu each cell. (Radicle incumbent) . . . . 21. CAPSELLA. 



