Convolvulus hystrix Vahl  

Distribution:

Eritrea, Sudan, Egypt,Saudi Arabia Western region.
 

Leaves :

oblong to obovate,
acute, truncate to attenuate at base, entire, 4-13 x 2-5 mm, densley villous; petiole 1-3 mm long.

Flowers :

in a compact cyme, sessile. Bracts foliaceous; bracteoles 5-7 x 3-5 mm, with recurved tip.

Perinth:

The calyx with Sepals convex,
villous; outer sepals obovate, acute, 8-9 x 4-5 mm; inner sepals obovate, mucronate, 6-8 x 2-3 mm.

Corolla :

12-15 mm long, pale violet or blue, with hairy bands outside.

Stamens unequal, 7-8 mm long;
filaments with stalked glands on the flattened part; anthers broadly oblong with retuse apex.
 

Ovary ovoid,
glabrous with lobed disc at the base; styles 7-8 mm long, filiform, glabrous; stigmas 1-1.5 mm long,
cylindrical-clavate.