Heliotropium ovalifolium Forssk.

Global description
 
Heliotropium ovalifolium is an annual or perennial grass of short life, prostrate, more or less woody and branched at the base, reaching 40 to 60 cm long, twigs with densely appressed whitish hairs. The leaves are simple, alternate, with petioles 5 to 10 mm long, obovate to elliptic leaf lamina covered with silvery white appressed hairs. The inflorescences are spike-like uniparous cymes, terminal, about 4 cm long, without bract and hairy. The pentamerous flowers, about 4 mm long, with white corolla, are arranged in two rows. Fruits are subglobose, 1.5 mm by 2 mm, densely covered with short hairs.
 
General habit
 
Annual or perennial herb of short life, prostrate, more or less woody and branched at the base, reaching 40 to 60 cm long, grayish-white in appearance.
 
Underground system
 
Taproot.
 
Stem
 
The stem is cylindrical, full, more or woody and branched, densely covered with appressed whitish hairs.
 
Leaf
 
The leaves are simple, alternate, with long petioles of 5 to 10 mm. The leaf blade is elliptic to obovate, 10-25 mm long and 5-13 mm wide; wedged or rounded apex, shortly apiculate; the base is in the corner; the margin is entire. Both sides are covered with silvery white appressed hairs.
 
Inflorescence
 
The inflorescences are spike-like uniparous cymes, scorpioid, terminal, of variable length, about 4 cm long, sometimes up to 10 cm long, without bract and hairy; the flowers are arranged in two rows.
 
Flower
 
The bisexual and pentamerous flowers consist of:
- A persistent calyx, 2 mm long, divided into five unequal lobes, densely hairs,
- A white corolla 3 mm long, in cylindrical tube, with oval lobes, apiculate, more or less pubescent outside,
- The thin stamens with short filament are inserted below the half of the corolla tube, anthers oblong about 0.6 mm long,
- A superior ovary with 4 loculus, glabrous, short and thick style, long as the ovary.
 
Fruit
 
The fruit is a sub-spherical capsule, 1.5 mm long and 2 mm in diameter, densely covered with short hairs. At maturity it separates into 4 indehiscent valves (nucule) each containing a seed.

https://www.gbif.org/species/7566320