CllUCIFKR^. 26 



23. liEPIDIUM, Liunfflus. 



latlpes. Hook. Stout, rigid stem, 1 to 3 in. long; leaves longer: pods long-wingei 

 dictyotum, Gr. var. acutidens Gr. Stem slender, 1 to 3 in, high, 

 oxycarpum, T, & G. Slender: petals none: stamens 2: smooth poda nodding, 

 lutidum, Nutt. Petals small: pods shining, acutely margined, 

 strictum. Often matted: sepals persistent: pods erect in dense racemes. 

 Menziesii, DC. Hispid or pubescent: petals none; poda glabrous, 

 lasiocarpum, Nutt. Rough -pubescent: pods hispid on margin. 

 VirginioTim, L. Smooth stem erect, at length leafless below, paniculate 

 Draba, L. Perennial: leaves not lobed: petala large: pods cordate. 

 campestre, L. Stout: leavea aerrate: poda ovate, broadly winged, scabrooa. 



24. SENEBIEBA, De CandoUe, 

 1. S. didyma, Fers. Racemes opposite pinnatifid leaves. Ill-scented. 



25. HEIEBODBABA, E. L. Greene. 

 1. H. imilateralis, Greene. Branching, nearly prostrate; pedicels reflezed. 



26. ATHYSANUS, E. L. Greene. 



1. A. pusillus, Greene. Very slenier (Thysanocarpus pimllus, 'B.ooksiy 



27. XHYSANOCAE.PUS, Hooker. 



1. T. ciirvipes, Hook. Leaves clasping: border of poda often perforate. 



2. T. laciniatus, Nutt. More slender: leavea scarcely clasping: pods entire. 



3. T. radians, Benth. Glabrous: poda with radiating ribs, 4 or 5 lines broad. 



28. RAFHANXrS, Linnsus. 



1. B. Bativus, L. Petals veiny, color variable: pithy pods 1 to 1 J in. long. 



2. K. Kaphanistrum, L. Similar: poda more constricted between seeds. 



CAPPARIDACE.E. 



1. ISOMERIS, Nuttall. 



L I. arborea, Nutt. Yellow flowers in bracteate racemes: stamens ezserted. 



2. CliEOME, Linnaeus. 



1 C. platycarpa, Torr. Erect annual: yellow flowers corymbose; pod hanging. 



