ONAGRARIE.E 571 



Endosperm forming a very thin layer surrounding the embryo, 

 thickened somewhat at the chalaza. 



Embryo straight, large, nearly occupying the whole interior of 

 the seed, and conforming to it in shape, more or less obovoid, fleshy, 

 colourless ; cotyledons plano-convex in the broader way of the seed! 

 but sometimes reversed, broadly obovate, oblong or more elongated 



FIG. SGG. CEnothera stricta, x 2. 



and proportionately narrower, slightly notched at the apex by the 

 thickening of the endosperm at the chalaza, more deeply notched 

 at the base where the radicle and plumule lie ; radicle short, straight, 

 turbinate, obtuse, close to the hilum. 



DEVELOPMENT OF COTYLEDONS. 



Immediately after germination the cotyledons are oblong-oval, 

 entire with a slightly prominent, colourless tooth at the apex 

 of the midrib, or minutely emarginate with a sunk tooth, sessile 

 or subsessile. Sometimes one cotyledon is entire, the other 

 emarginate. 



