S. NAZIMUDDIN AND M. QAISER
Oldenlandia retrorsa Boiss.
Perennial herb, ± woody at the base, di-trichotomously branched. Stem cylindrical, retrorsely scabrid or hispid, specially in the lower portion of the stem, upper portion laxly hispid or ± glabrous; internodes 2-4 cm long, the last internode or floral node up to 8 cm long. Leaves fascicled, 5-18 (-20) x (1-) 1.5-4 (-5) mm; linear-oblong or lanceolate, acute, flat, hispid on both surfaces, midrib prominent; stipules triangular, bidentate. Inflorescence a trichotomously branched cyme, glabrous, spreading. Flowers sessile or shortly pedicelled. Pedicels 1-2 mm long, enlarged in fruit. Calyx glabrous; tube globose, lobes triangular-subulate, 0.8-1 mm long. Corolla glabrous, purplish or whitish; tube 10-12 (-14) mm long, dilated above; lobes oblong, obtuse, c. 1.5-1.8 mm long. Anthers inserted at the throat of corolla tube, included. Stigma distinctly below the anthers. Capsule didymous, glabrous, ± shining, 3-3.5 mm broad and 2.5-3 mm long.
Fl. Per.: Almost throughout the year.
Type: In monte Chebek, Arabiae Mascatensis, Aucher-Eloy 4658 (G-BOIS).
Distribution: Pakistan (Sind and Baluchistan) and Arabia.
A very common species of sandy areas and dry river beds; can easily be distinguished from its nearest ally Kohautia aspera (Roth) Bremek by its perennial habit and longer flowers.