LABIATE 



385 



Nepeta nuda, L. (fig. 593). 



Fruit of four nutlets, separating when mature, oblong-oval, 

 convex and flattened dorsally, obtusely angled on the ventral 



FIG. 592. Dracocephalum FIG. 595.Nepeta nuda, x 25. Longi- 



peltatum. tudinal section of nutlet : S, radicle ; 



Half nat. size. A, auricle of cotyledon ; PC, pericarp ; 



T, testa ; P, endosperm. 



aspect, scabrid, black, with a white, transverse scar a little above 

 the base on the ventral aspect ; pericarp separable into an outer 

 rather soft dark layer, and an inner paler leathery one. 



Seed conforming to the shape of the nutlet, and filling it entirely 

 if properly developed, pale grey ; hilum nearly or quite basal ; 

 micropyle contiguous, basal ; raphe ventral ; chalaza some distance 

 below the apex on the ventral aspect. 



Endosperm forming a thin film lining the interior of the testa, 

 white. 



Embryo straight, filling the entire seed with the exception of 

 the film of endosperm, colourless ; cotyledons oblong-oval, rounded 

 at the apex, auricled at the base, one concavo-convex, the other 

 biconvex, as long as the cavity of the seed ; auricles produced along 

 the sides and partly over the back of the radicle to fill up the space 

 in the seed; radicle oblong, obtusely pointed, protruded only a 

 little way beyond the cotyledons. 



Seedling (fig. 594). 



Primary root slender, tapering, normal. 



Hypocotyl erect, terete, densely glandular-pubescent, 3-4 mm. 

 above the soil. 



n. c c 



