bh 
ll ed a 
= 2 St Sr St 
= 
CRUCIFERAE. 25 
23. LEPIDIUM, Linneznus. 
latipes, Hook. Stout, rigid stem, 1 to3 in. long; leaves ‘onger: pods long-winged. 
dictyotum, Gr. var. acutidens Gr. Stem slender, 1 to 3 in. high. P 
oxycarpum, T. &G. Slender: petals none: stamens 2: smooth pods nodding. 
nitidum, Nutt. Petals small: pods shining, acutely margined. 
strictum. Often matted: sepals persistent: pods erect in dense retemes. 
Menziesii, DC. Hispid or pubescent: petals none: pods glabrcns. 
lasiocarpum, Nutt. Rough-pubescent: pods hispid on margin. 
Virginicum, L. Smooth stem erect, at length leafless below, paniculate, 
Draba, L. Perennial: leaves not lobed: petals large: pods cordate, 
L. campestre, L. Stout: leaves serrate: pods ovate, broadly winged, scabrous, 
2S 0 38 3 So 2 > 
24, SENEBIERA, De Candolle. 
8. didyma, Pers. Racemes opposite pinnatifid leaves. Tll-scented. 
25. HETERODRABA, E. L. Greene. 
H. unilateralis, Greene. Branching, nearly prostrate; pedicels reflexed. 
26. ATHYSANUS, E. L. Greene, 
A. pusillus, Greene. Very slender (Thysanocarpus pusillus, Hookers 
27, THYSANOCARPUS, Hooker. 
T. curvipes, Hook. Leaves clasping: border of pods often perforate, 
T. laciniatus, Nutt. More slender: leaves scarcely clasping: pods entire. 
T. radians, Benth. Glabrous: pods with radiating ribs, 4 or 5 lines broad. 
28. RAPHANUS, Linnezus, 
R. sativus, L. Petals veiny, color variable: pithy pods 1 to 14 in. long. 
BR, Raphanistrum, L. Similar: pods more constricted between seeds, 
CAPPARIDACEE. 
1, ISOMERIS, Nuttall. 
I. arborea, Nutt. Yellow flowers in bracteate racemes: stamens exserted. 
2. CLEOME, Linnzus. 
C, platycarpa, Torr. Erect annual: yellow flowers corymbose; pod hanging. 
