Sabdariffa sangaredi Thiam & Cheek 2026, sp. nov.

Sabdariffa sangaredi Thiam & Cheek sp. nov. Figs 1, 2 Type. Republic of Guinea • Boké Prefecture, Sangaredi, Para Gogo, Bowal Dalagahe, 11°7'52.7"N, 013°51'10.6"W, 228 m elev., 19 Nov 2013 (fl, fr), K. Guilavogui, L. Lopez Poveda & M. B. Bah 613 (holotype: K barcode K 000749855; isotype: HNG). Diagnosis. Similar to Sabdariffa sineaculeata (F. D. Wilson) Mwachala and R. L. Barrett and S. scotellii (Baker f.) Mwachala and R. L. Barrett in the non-aculeate stems, entire involucellar bracts, non-fleshy calyx, palmately lobed leaves, nectar glands on leaves and calyx, differing in the involucellar bracts 3 mm wide (not 2 mm or less), the calyx with only simple broad-based bristle hairs (not stellate hairy), the leaves 3 - lobed by c. 8 / 10 ths their radius (not shallowly 3 - lobed by 9 / 10 ths). Description. Annual herbs, generally erect, (10 -) 20–35 (- 120) cm in height. Stem internodes 2–3.5 cm long, pale yellow, c. 2 mm in diam., lateral branches frequent in larger plants, ascending, 1–11.3 cm long, indumentum of distal 5–9 nodes sparsely hairy c. 10 % cover, hairs soft, translucent or white, patent or retrorse, simple, bifid and trifid, (0.2 -) 0.3–0.4 (- 0.5) mm long, mixed with 4–7 - armed stellate hairs 0.125–0.5 mm diam., the arms suberect or spreading and with minute red, sessile, globose glands 0.05 mm diam.; longitudinal hair band grey-brown, c. 0.4 mm wide, 80–100 % cover of minute soft, simple and stellate subappressed, reflexed hairs 0.1–0.2 mm long; proximal (basal) nodes of stems glabrous with network of corky ridges. Stipules deciduous, subulate to linear-oblong, 0.75–1.75 × 0.25 mm, apex rounded, indumentum sparse, simple, translucent, stiff, appressed hairs 0.1–0.3 mm long. Petioles plano-convex, 1.5–4 cm long, 0.3–1 mm wide, indumentum as stem, adaxial surface with longitudinal hairband. Leaves on the main axis subtending flowers are deeply 3 - lobed (very rarely 5 - lobed), triangular in outline, 3–5.5 × 4.2–5 (- 8) cm, while the lower (proximal) leaves are entire, ovate, or elliptic-oblong, 2.5–5 × 2.2–3.5 cm, leaves on the lateral branches are slightly smaller; lobes oblong-elliptic, lateral lobes 2–4 × 0.5–0.8 cm, extending to 8 / 10 th of the radius of the blade, at c. 90 degrees from the median lobe, median lobe 10–20 % longer and broader than the laterals, sometimes with a secondary lobe, lobes with 2–12 shallowly dentate to serrate teeth per side, teeth 0.1–0.3 mm long, apices red; secondary nerves conspicuous on both surfaces, reticulate, cells c. 2 mm diam.; nectar gland on the abaxial surface inserted on midrib c. 2 mm above the lateral nerve junction, gland 1.8 × 0.8 mm, broader than the midrib, the stoma longitudinal slit 0.5 mm long, glabrous apart from minute marginal, simple to stellate hairs c. 0.1 mm long, adaxial blade surface with very sparse (