286 OX SEEDLINGS 



sinus, obtuse or acute with the basal lobes frequently angled or 

 obtusely dentate. 



Convolvulus Soldanella, L. 



Fruit, seeds, and embryo similar to those of C. sepium ; seeds a 

 deep, dull, purplish-black colour. 



Seedling. 



Hypocotyl short, subterranean, gradually and indistinguishably 

 tapering into the root. 



Cotyledons very similar to those of C. sepium, but rather wider 

 and with longer petioles. 



Stem herbaceous, erect, terete, marked with two raised, somewhat 

 muricate lines running down from the base of each leaf, one on each 

 side, green, heavily mottled with purple in the young stage, glabrous, 

 ultimately procumbent, trailing or slightly twining, considerably 

 twisted, pale green and mottled with pale purple ; interuodes vari- 

 able ; 1st 3-8 mm. long ; 2nd 3'5-4*5 mm. ; 3rd 4'5-10 mm. 

 Ultimate ones 2-3 cm. 



Leaves exstipulate (or adult ones with stipule-like excrescences 

 at the base of the petiole which are constant), trinerved from the 

 base, each nerve branching considerably on the lamina of the leaf ; 

 petiole as in C. sepium. 



Nos. 1 and 2. Reniform-orbicular, minutely emarginate, other- 

 wise entire or rarely incipiently angled at the sides towards the 

 base, cuneate in the basal sinus, deep green, shining. 



Ultimate leaves reniform, shortly cuspidate, shallowly and ob- 

 tusely angled at the ends of the principal nerves and shallowly 

 crenate between, cuneate in the basal sinus, the three primary nerves 

 much branched, giving rise to reticulate venation. 



Convolvulus tricolor, L. 



Capsule two -celled, one- to four -seeded, pale brown, brittle, 

 dehiscing by the separation of the valves from the septum. 



Seed where four occupy the capsule obtusely trigonous, forming 

 the fourth part of a sphere, equal at the base, murieate or covered 

 with little elevations on all sides, pale whitish, ultimately brown ; 

 hilum oblong- subreniform, small, seated about the centre of the small 

 horizontal depression at the base of the seed, with the slightly 

 convex side to the inner angle. 



Endosperm thin and membranous where in close contact with 

 the folds of the embryo, but forming masses in the unoccupied spaces? 

 swelling up and becoming mucilaginous in water. 



