M. Thulin (2006) Pentanisia in Flora of Somalia 3: 66-68
Plants perennial herbs up to 60 cm tall; stems usually pubescent with more or less spreading hairs. Stipule sheaths 3-8 mm long, with several fimbriae 2-9.5 mm long; leaf blades linear to lanceolate or narrowly elliptic, 15-100 mm long, 3-27 mm wide, glabrous or pubescent, particularly over the veins, tips acute. Inflorescences dense terminal heads; peduncles 0-10 cm long. Calyces hairy, with leaf-like lobes 3-10 mm long and 0.8-2 mm wide; corollas bright blue, shortly pubescence on the outside; corolla tubes 7-23 mm long; corolla lobes 2-5.5 mm long. Fruits globose, more or less woody, 2.5-5 mm long, 2-5-celled; seeds about 3 mm long.
Pentanisia ouranogyne grows in grassland and bushland, often on limestone or in semi-evergreen bushland on sand at elevations of 20-1650 m. It has been found in regions N1- and S3 of the Flora of Somalia and in Ethiopia, Uganda, Kenya and Tanzania.
Perennial herbs up to 60 cm tall with opposite, narrowly elliptic leaves 15-100 mm long and dense heads of blue flowers that are 7-23 mm long and have lobes 2-5.5 mm long. Both the calyces and the corollas are hairy. The stipules have fimbriae 2-9.5 mm long.
Pentanisia ouranogyne grows in grassland bushland at 20-1650 m elevation.