CRUCIFKR^. 26 



23. liEPIDIUM, Linnfflus. 



latipes, Hook. Stont, rigid stem, 1 to 3 in. long; leaves ;onger: pods long- winged 

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

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

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

 strictum. Often matted: sepals persistent: pods erect in dense rsr^emea. 

 Menziesii. DC. Hispid or pubescent: petals none: pods glabrcas. 

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

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

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

 campestre, L. Stout: leaves serrate: pods ovate, broadly wing&d, scabroat. 



24. SENEBIEBA, De CandoUe, 

 1. S. didyxna, Pers. Racemes opposite pinnatifid leaves. Ill-scented. 



26. HETERODRABA, E. L. Greene. 

 I, H, Tinilateralis, Greene. Branching, nearly prostrate; pedicels reflexed. 



26. ATHYSANUS, E. L. Greene. 



I. A, pusillus, Greene. Yery slender {Thy sanocaT^pua pusillus^ Hool^iy 



27. THYSANOCABPUS, Hooker. 



1. T, curvipes, Hook, Leaves clasping: border of pods often perforate. 



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



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



28. BAPHANUS, Linn^us. 



1. B. sativus, L. Petals veiny, color variable: pithy pods 1 to 1^ in. long. 



2, B>. Kaphanistruxn, L. Similar: pods more constricted between seeda. 



CAPPARIDACEJE. 



1. ISOMERIS, Nuttall. 



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



2. CLEOME, Liuuffius. 



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



