SCROPIIULARINE/E 



309 



Seed orbicular, much imbricated, winged with a basal notch, 

 sessile on a little projection of the placenta, flattened on the ventral 

 aspect or slightly concave by the recurving of the marginal wing, 

 convex and compressed laterally, with the central part containing 

 the endosperm and embryo the thickest. Testa furnished with scat- 

 tered minute raised points, finely and minutely reticulate especially 

 towards the margin of the disc, the wing substriate, pale green 

 when young, becoming white, ultimately black ; hilum inconspicu- 

 ous, superior and close to the micropyle, in or close to the basal 

 notch of the wing of the seed, 1-75-2-25 mm. in diameter. 



O.T. v 

 I IT. ? 



FIG. 552. Linaria vulgaris, x 20. A, longitudinal section of seed. B, trans- 

 verse section of seed: EN, basal notch; W, wing; OT, testa; IT, tegmen; 

 jR, radicle ; Cs, cotyledons ; P, endosperm. 



Endosperm copious, colourless, occupying the central disc of the 

 seed, which is more or less oval, and lies obliquely to the hilum or 

 basal notch. 



Embryo curved, in most cases nearly equalling the diameter of 

 the endosperm, colourless ; cotyledons oval-oblong, obtuse, entire, 

 plano-convex or nearly flat, closely adpressed face to face, and most 

 often obliquely to one another, sessile, lying in the broader way of 

 the seed with their backs to the axis ; radicle terete, obtuse, 

 superior, and close to the micropyle, much thinner than the width 

 of the cotyledons and searly twice as long. 



The two following Species agree with this Type. 

 L. saxatilis, DC. 



Capsule 3-4 mm. long, 3'4 mm. wide, and 2'75-3'25 mm. thick 

 when fresh. 



