RH(EADIN.ffi. 



401 



O |[ : Camelina (Gold -of -pleasure) has a spheroid, pear-shaped 

 siliqua with a small rim passing right round (Fig. 402). Subu- 

 laria (Awlvvort), an aquatic plant with perigynous flower (Figi 

 403) and folded cotyledons. 



2. Silicula, narrow replum (Siliculosee angustiseptse), i.e. 

 the replum is much shorter than the arched, more or less boat- 

 shaped valves (Figs. 405, 406, 407). 



O=: Thlaspi (Penny-Cress) has a flat, almost circular silicula, 

 emarginate or cordate, with a well-developed wing round the edge 

 (Fig. 406). Iberis and Teesdalia : the racemes during flowering 



PIG. 401. Lunaria biennis. 

 Fruit, the valves of which 

 have fallen off. 



FIG. 402. Came- 

 lina sativa. Fruit. 



FIG. 4fl3. Sulndaria aquatica. 

 Longitudiual section through 

 the flower. 



are especially corymbose, and the most external petals of the outer 

 flowers project radially and are much larger than the other two 

 (the flower is zygomorphic). Biscutella, Megacarpcea. 



O || : Capsella (Shepherd's-Purse) has a wingless, obcordate or 

 triangular silicula (Fig. 407). Lepidium (Pepperwort) has a few- 

 (2-4) seeded, slightly winged, oval silicula. Senebiera has a silicula 

 splitting longitudinally into two nut-like portions ; its cotyledons 

 are folded. Anastatica hierochuntica ("Eose of Jericho ") is au annual, sili- 

 cula-fruited, desert plant (Arabia, Syria, N. Africa). After the flowering all its 

 then leafless branches bend together upwards, forming a kind of ball; this 

 spreads out again on coming in contact with water, and the fruits then dis- 

 seminate their seeds, which germinate very quickly, often in the fruit. 



W. B. D D 



