Psoraleaditurnerae and P.vanberkelae (Psoraleeae, Fabaceae): two new species restricted to the Core Cape Region of South Africa

PhytoKeys. 2015 Jan 15;(44):97-107. doi: 10.3897/phytokeys.44.8999. eCollection 2015.


Two new species of Psoralea L. are described: Psoraleaditurnerae A. Bello, C.H. Stirt. & Muasya, sp. nov. and Psoraleavanberkelae C.H. Stirt., A. Bello & Muasya, sp. nov. Psoraleaditurnerae is endemic to the Outeniqua mountains (Camferskloof) and is characterised by a mass of numerous basal shoots out of which emerge 2-3 woody stems up to 2 m tall, 3-foliolate needle-like leaflets at the base of the seasonally growing shoot reducing to one towards the apex and bearing numerous 1-3-flowered axillary inflorescences along its length; each mauve to purple and white flower subtended by a trifid cupulum. Psoraleavanberkelae is characterised by its spreading mounding habit, short tightly packed fleshy leaves, with large impressed papillae, densely glandular short broadly triangular stipules, pale to intense mauve to deep blue flowers, standard with a dark purple central blotch above a M-shaped white patch situated above claw, and khaki seeds with purple flecks.

Keywords: Endemic; Fabaceae; Leguminosae; New species; Psoralea; Psoraleeae; South Africa; Taxonomy.