CRUCIPER^ 17 



Synopsis of the Geucra. 



* Pod dehiscent by S valves^ usually much longer than broad. 



1. Nastur'lliiin. Flowers white or yellow. Pod terete, oblong-linear 



or ellipsoid. Seeds in two rows in eacli cell, globular, witliout a 

 wing. Cotyledons accumbeut. 



2. Barbarc'a. Flowers yellow. Pod aomewliat 4-sided, the valves 



strongly X-nerved. Seeds in arte row in eacli cell. Cotyledons 

 occumbent. 



3. Vesica' I'ia. Flowers yellow. Plant densely hoary with stellate 



hairs. Pods ovate or globose. Seeds ilattened, in two rows in 

 each cell. Cotyledons aceumbent. 



4. Iteula'rla. Flowers white or pale purple. Pod lanceolate, flat. 



Seeds wingless, on broad seed-stalks. Stem-leaves 2 or 3 in a 

 whorl ; stem naked below. JRoot-stoclc toothed or tuberous. 

 Cotyledons accumben fc. 



5. Carilaiii'iiLe. Flowers white or rose-coloured. Pod linear or lance- 



olate, flat, the valves nerveless. Seedswingless, on slenderseed- 

 stalks. Stem leafy below. Cotyledons aceumbent. 



6. Ar'abis. Flowers white or whitish. Pod linear or elongated, flat- 



tened, th^ valves usually with a distinct mid-rib. Stem leafy. 

 Cotyledons aceumbent. 



7. Erys'jiuiiiu. Flowers yellow (or creamy). Pod linear, distinctly 



4-sided. Stigma broadly 2-lobed. Pedicels of tlie pods diverging 

 from the stem. Leaves simple, not clasping. Pubescent with 

 appressed hairs. Cotyledons incumbent. 



8. Slayin'briiini. Flowers yellow, small. Pods awl-shaped or 4-G- 



sided, the valves l-3-nerved. Stigma small. Cotyledons incum- 

 bent. 



9. Hes'perls. Flowers large, purple. Pod terete, elongated. Stigma- 



lobes narrow, erect. Cotyledons incumbent. 



10. Bras'sica. Flowers yellow. Pod linear or oblong, nearly terete, 



or 4-sided, toith a distinct beak extending beyond the end of the 

 valre-^. Seeds usually in one row. Cotyledons conduplicate. 



11. Diplotax'ls. Sepals, petals, and stamens almost as in Brassica. 



Pods slender, on slender spreading pedicels. Beak conical, 

 usually short. Seeds in two rows. 



* * Pod dehiscent by 2 valves, comparatively short. 

 •*- Silicle compressed parallel with the broad partition or globular. 



12. Draba. Flowers white. Pod flat; seeds several or many, 2 rows 



in each cell. Cotyledons aceumbent. Low herbs. 



13. Alys'siiiu. Flowers pale yellow or white. Pod orbicular, flat, 



2-4-seeded. 



14. CaiucI'lua. Flowers yellow. Pod pear-shaped, pointed ; valves 



l-nerved. Cotyledons incumbent. 



