Stipa atlantica P. A. Smirn. (Smirnov 1929

Stipa atlantica P. Smirn. (Figure 57 (1)). Lemma dorsal surface: Characterised by long rectangular cells of (15–)25–53(–61) × (7–)11–17(–20) µm, sinuous walls up to 5 µm thick, linear distribution. Short cells: Silica cells of 6–12 × 5–10 µm, circular, obovate to oblong, frequently in pairs or threes with hook cells, less often with cork cells, situated between long cells, never solitary; Cork cells (2–)3–9(–10) × 7–10 µm, sub-reniform to fusiform, sporadic, always with a silica cell. Spines and hairs: Hooks sub-quadrangular to circular base (7–)10–18(20) × 4–8(–10) µm high, regularly distributed between long cells, in pairs or threes with silica, cork cells, more frequently solitary, density 9–12 hooks/100 µm 2; Macro-hairs> 600 µm long, with circular base 11–20 µm, regularly distributed in lines from mid-dorsal to base of lemma. Lemma apical surface: Characterised by long cells similar to those of the dorsal area, slightly longer to 80 µm and up to 6 µm thick, sinuous walls. Short cells: Silica cells of 5–12 × 7–14 µm, more frequent than in dorsal area and similar distribution and morphology to the dorsal; Cork cells (2–)3–8 × 7–9 µm, oblong to sub-reniform, of equal distribution to the dorsal. Spines and hairs: Hooks circular base 9–17 µm, less dense than in dorsal area 7–10 hooks/100 µm 2; Prickles absent; Macro-hairs of obovate to circular base, located at margin leading up to apex. Awn base surface: Characterised by long cells of acute to oblique apices to 380 µm on twisted, flat and angled parts. Short cells absent. Spines and hairs: Hooks absent; Prickles absent; flat area smooth; Macro-hairs not observed. Stomata paracytic (Parallel-sided subsidiary cells type), of linear distribution on flat parts and grooves between twists, density 120–160(–200) stomata/ 1 cm 2. Material studied: Morocco: Timahdik, 2350 m.a.s.l., 24-VI-2020, M. Chamboleyron, ECWP n.n.