Euphorbia otjipembana Leach (1976: 29)

Bruyns, Peter V., Klak, Cornelia & Hanáček, Pavel, 2020, A review of the Euphorbia schinzii-complex (Euphorbiaceae) in southern Africa, Phytotaxa 436 (3), pp. 201-221 : 208

6. Euphorbia otjipembana Leach (1976: 29) .

Type:— NAMIBIA. Kaokoveld: north of Otjipemba, 21 July 1973, Leach & Cannell 15044 (holotype PRE!, isotypes BM!, K!, LISC, M!, MO, SRGH, WIND!).

Distribution: — Subsp. otjipembana is endemic to Namibia. Subsp. fluvialis is found in both Namibia and in the neighbouring part of southern Angola, where it is associated with rocky places on both the Angolan and Namibian sides of the valley of the Cunene River, between Ruacana and west of Epupa ( Fig. 3 ).

Two subspecies are recognized. They may be distinguished as follows:

1. Branches (4-)5- to 6-angled, spines 4–9 mm long, cyathial glands yellow and slightly concave above, spreading to ± erect ........... .............................................................................................................................................................................. subsp. otjipembana

1. Branches 4-angled, spines 9–14 mm long, cyathial glands suffused with pink (rarely yellow), concave above, ± erect (rarely somewhat spreading) ................................................................................................................................................... subsp. fluvialis

Figures

FIGURE 3. Distribution of Euphorbia otjipembana (circle = subsp. otjipembana, triangle = subsp. fluvialis).