Jones: Flora of Illinois, 71. Cruciferae 137 



12. Pods globose. 



13. Pods reticulate when dry, indehiscent, 1-2-seeded; plant hispid with 



branched hairs 23. Neslia 



13. Pods smooth, dehiscent, 2-16-seeded; plant stellate-pubescent 



24. Lesquerella 



12. Pods obovoid 25. Camelina 



I. Petals white, pink, or purple (rarely absent), never yellow. 

 14. Pods several times longer than wide (a silique). 



15. Pods indehiscent, cylindrical, several-seeded, with pith between the seeds but 

 no true partitions, breaking at maturity into 1 -seeded segments; petals purple 

 or white. 

 16. Pod 2-seeded, 2-iointed 1. Cal(ile 



16. Pod several-seeded, several-jointed 2. Raphanus 



15. Pods dehiscent by 2 valves, without transverse partitions. 



17. Pods more or less flattened parallel to the septum. 



18. Leaves palmately cleft and divided 13. Dentaria 



18. Leaves otherwise. 



19. Pubescence of simple hairs or none; leaves simple or pinnately 

 divided; valves of the pod nerveless, elastically dehiscent and 

 recurving at maturity 15. Cardamine 



19. Pubescence, at least in part, of branched hairs. 



20. Pods slightly flattened, or nearly terete, more than 1.5 cm. long; 



stem leafy 1 6. Arabis 



20. Pods strongly flattened, 2-15 mm. long; leaves chiefly basal 



(except D. brachycarpa) 12. Draba 



17. Pods terete or tetragonal, net at all flattened. 



21. Valves of the pod conspicuously keeled, 3-nerved; leaves deltoid- 

 cordate, dentate, petiolate; plant with garlic odor 8. Alliaria 



21. Valves of the pod rounded or flat. 



22. Leaves simple, pinnately lobed to entire. 



23. Petals white; plant sparsely pubescent with forked hairs; pods 

 1-1.5 cm. long; stigma 2-lobed 17. Arabidopsis 



23. Petals purple; plant glabrous; lower leaves pinnatifid at the 

 base, dentate, the upper ones lanceolate, dentate, tapering to 



an auriculate base; pods 2-3 cm. long; stigma entire 



14. lodanlhus 



22. Leaves odd-pinnate with 1-1 I roundish or oval leaflets; petals 

 white; mature pods 1-2 cm. long, somewhat curved; aquatic 

 glabrous perennial 1 8. Nasturtium 



14. Pods short, usually not more than three times as long as wide (a silicle). 

 24. Pubescence, if any, of simple hairs. 



25. Pods terete, ellipsoid, or subglobose, not at all flattened; plants glabrous. 



26. Basal leaves 15-30 cm. long, oval or ovate, crenate; root large, thick, 



pungent; pods 2-loculed, seldom maturing, the style 0.5 mm. long 



- 20. Armoracia 



26. Basal leaves smaller, often finely divided (if in water) ; pods 1-loculed, 



the style 2-3 mm. long 19. Neobecl^ia 



25. Pods more or less compressed or flattened. 



27. Plants grayish pubescent; upp>er leaves ovate, clasping, dentate; the 



lower oblanceolate ; pods broadly ovate, indehiscent, papillose, 4 mm. 

 broad, notched at the base, the style 1 -2 mm. long 26. Cardaria 



27. Plants green, pubescent or glabrous; pods suborbicular, dehiscent, 

 notched at the apex. 



28. Pods 2-seeded, less than 5 mm. broad; branches puberulent 



- -.27. Lepidium 



28. Pods several-seeded, 1-1.5 cm. broad; plants glabrous.. ..28. Thlaspi 



