Stipa mediterranea Asch. & Graeb.

Stipa mediterranea (Trin. & Rupr.) Asch. & Graeb. (Figure 57 (2)). Lemma dorsal surface: Characterised by long rectangular cells of (12–)20–51(–58) × (7–)10–16(–18) µm, sinuous walls up to 5 µm thick, linear distrubution. Short cells: Silica cells of 7–14 × 7–10 µm, circular, obovate to oblong, frequent with cork cells and in pairs or threes with hook cells, situated between long cells, occasionally solitary; Cork cells (3–)5–8(–9) × 8–12 µm, sub-reniform (fewer) to fusiform (frequent), with a silica cell (frequent). Spines and hairs: Hooks sub-quadrangular to circular base (8–) 10–19(–21) × 5–9(–10) µm high, regularly distributed between long cells, in pairs or threes with silica or cork cells, occasionally solitary, density 10–14 hooks/ 100 µm 2; Macro-hairs> 570 µm long, circular base 10–18(–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, up to 110 µm long, sinuous wall up to 6.5 µm thick. Short cells: Silica cells of 5–11 × 7–12 µm, similar distribution and morphology to the dorsal area; Cork cells (2–)3–7 × 7–12 µm, oblong to sub-reniform (fewer), of equal distribution to the dorsal. Spines and hairs: Hooks circular base 9–18 µm, similar density to dorsal area 9–14 hooks/ 100 µm 2; Prickles absent; Macro-hairs of obovate to circular base, up to 390 µm, located at margin up to apex. Awn base surface: Characterised by long cells of acute to oblique apex up to 430 µm in twisted, flat and angled parts. Short cells absent. Spines and hairs: Hooks absent; Prickles Angular types, with oblong to lineal base of 9–14 × 4–6 µm and up to 7 µm tall; Macro-hairs absent. Stomata paracytic (Parallel-sided subsidiary cells type), of linear distribution on flat parts and in grooves between twists, density 50–90(–120) stomata/ 1 cm 2. Material studied: Spain: Huesca: Purroy de la Solana, 10-VII-1990, F. M. Vázquez, HSS0056874; Lérida; Conques, 11-VII-1990, F. M. Vázquez, HSS0056856.