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24 THE CKUOIFER FAMILY. 



9 f Pod at least 3 or 4 times as long as broad (Siliquosje) 3 



\ Pod not 3 times as long as broad (Siliculos^e) . . .... 14 



o ctttaitacj?] Flowers white, purple, or red (never yellow) .... 4 

 a fe^iQuos^E| Flowersyellow 10 



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



4-j erect and parallel 5 



( Petals small, or the claws scarcely longer than the calyx. Stigma entire . 6 



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

 cumbent) 1. Matthiola. 

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

 cumbent) 7. Hesperis. 



fi J Leaves all undivided 7 



1 Leaves, at least the lower ones, pinnate 8 



7 f Leaves all stalked, large and broad 9. ALLIARIA 



I Upper leaves sessile or auricled 5. Arabis 



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

 8-j 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. 



y \ Leaves all pinnate or divided 6 Card amine. 



f All the leaves entire, or toothed only. Plant pale or hoary, with minute 



, ft J appressed hairs . 11 



j Leaves, at least the lower or radical ones, pinnate or lobed at the base. 

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



' 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 



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. Brassica. 



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



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



fPod globular or oblong, or compressed. The valves flat or 



14 S liculos^J convex, parallel to the broad partition . . . . .15 



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



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



( Pod nearly globular or cylindrical 16 



\ Pod evidently compressed or flattened 20 



, fi f Minute aquatic plant with subulate leaves 16. Subularia. 



1 Terrestrial plants with flattened leaves 17 



«»( Flowers white. Radicle accumbent 18 



u \ Flowers yellow 19 



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

 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. 



u i Petals entire or notched 21 



21 /Pod nearly orbicular 13. Alyssum. 



1 Pod considerably longer than broad 14. Draba. 



29 j Two or more seeds in each cell of the pod 23 



A 1 One seed only in each cell 27 



„o J Leaves entire ... 24 



6 \ Leaves more or less pinnate 25 



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



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

 21. CAPSELLA. 



f Two seeds in each cell 26 



{ Many seeds in each cell. (Radicle incumbent) . . . - 21. Capsella. 



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