206 



NATURAL HISTORY OF PLANTS. 



Siscutella aiiriculata. 



Lepidium sativum 



(Garden cress). 



chinsia, Redoioskid, Syuthlipsis, Lyrocarpa, Biscutella (fig. 21)8), Bros 



sardia, HeldreieJiia, Megacarpcea, Cremolobus, and Didynwphysa. 



The Cresses or Pepper worts (Fi\, 

 Passerage ; fig. 297) head a second 

 subseries in this order, distinguished 

 from the first by possessing incum- 

 bent or more rarely conduplicate 

 cotyledons. So from the generic 

 name Lepidium we get that of the 

 subseries Lepidinece, which contains 

 twenty- one other genera : Hymeno- 



pJiysa, BracJ/ycarpaa, Stroganowia, Physalidium (?), Coronopus (figs. 



298, 299), Ionopsidium, Nocccea, Capsella (figs. 304, 305), Mancoa, 



Fig. 296. 

 Fruit (f). 



Fig. 297. 

 Fruit (f). 



Fig. 298. 

 Flower (f). 



Coronopus Ruellii. 



Fig. 299. 

 Long. sect, of flower. 



Nolothlaspi, Schouwia, Psy chine (fig. 30 G), Diloplda, Stubcndorfa, 

 Eunomia, JEt/rionema (figs. 300-303), Bivoncea, Cawpy/opfera, Menon- 



villea (fig. 307), Hexaptera and 



Mthionema coridi folium. t\ , a n ji 



JJecaptera. All these are most 

 closely related to one another 

 and to Lepidium. They differ 

 mainly, in the first place, in the 

 form of the valves. These are 

 sometimes wingless, sometimes 

 with a marginal or dorsa] wing ; 

 in the last case the fruit is 

 laterally compressed. In the 

 three last genera only the fruit is 

 subdehiscent, and the valves bear lateral wings. The next variation 



Fig. 300. 

 Fruit. 



Fig. 301. 

 Long. sect, of fruit. 



