CRUCIFER^ 31 



33. HUTCHINSIA, Br. 



Flowers small, white; petals equal; filaments without 

 scales; silicule 2-16-seeded; leaves pinnatifid. 



H. alpina, Br. ; stem leafless, 1-3 in. high, silicule 

 4-seeded; Jura, Dauphiny, Pyrenees. H. brevicaulis, 

 Br. ; a smaller plant, with shorter fruit -raceme, silicule 

 2-seeded ; moist alpine rocks. //. procuinbens, Desv. ; 

 stem leafy, prostrate, silicule 12-16-seeded ; Pyrenees, 

 Southern Switzerland. H. petrcea, Br. ; stem ascending, 

 leafy, petals not longer than sepals, silicule 4-seeded ; 

 limestone rocks. 



34. ^THIONEMA, Br. 



Sepals unequal, two gibbous at the base; longer fila- 

 ments toothed ; silicule winged ; valves boat-shaped. 



A. saxatile^ Br.; leaves thick, glabrous, flowers very 

 small, pink or white ; rocky ; Pyrenees, Southern Switz- 

 erland, Dauphiny. 



35. BiSCUTELLA, L. 



Sepals usuall}^ equal ; flowers yellow ; stem leafy ; 

 silicule separating into two distinct I -seeded valves. 



B. IcBvigata^ L. ; stem erect, much branched, leaves 

 shining, upper ones amplexicaul, flowers fragrant; 

 rocky ; Alps, Pyrenees, Dauphiny. B. cichoriifolia, Lois. ; 

 two of the sepals gibbous ; Pyrenees, Carniola. 



Tribe IsATIDEyE. — Silicule indehiscent, unilocular, 

 i-seeded. Genera 36-38. 



