Erect clump-forming herb. Leaves oblong-lanceolate to ovate-cordate, stiff-hairy, 8-18 cm. Inflorescences clustered near shoot apices, bract bluish-green. Flowers with 3 more or less equal petals, blue; late summer to mid-autumn.
Central and South America
Vigorous, freeflowering and thriving in strong light. Cold-tolerant.
C. tuberosa L. from Central and South America is a prostrate or trailing herb. Leaves narrow-lanceolate, margins hairy, 6-9 cm. Inflorescences axillary, erect, bract. Flowers with 3 more or less equal petals, green with purplish-blue streaks; summer. A spreading ground cover, grows in bright light to partial shade, somewhat cold tolerant.
Source: (2005). Commelinaceae. In: . Horticultural Flora of South-eastern Australia. Volume 5. Flowering plants. Monocotyledons. The identification of garden and cultivated plants. University of New South Wales Press.