Stipa apertifolia Martinovsky 1967

Stipa apertifolia Martinovsky (Figure 56 (2)). Lemma dorsal surface: Characterised by rectangular to quadrangular long cells of (12–)18–35(–42) × 14–18 µm, sinuous walls, 2–8 µm thick, linear distribution. Short cells: main Silica cells 7–12 × (10–)12–18 µm, circular, oblong to sub-quadrangular, sporadic and in pairs or threes with a hook or occasionally a cork cell, situated between long cells, never solitary; Cork cells 8–10(–12) × 5–9 µm, circular to fusiform, sporadic, always with a silica cell. Spines and hairs: Hooks circular to ovoid base 8–16(–17) × 12–18 µm high, regularly distributed between long cells, in pairs or threes with silica, cork or additional hook cells, more frequently solitary, density (12–)14–16 hooks/100 µm 2; Prickles not studied; Macro-hairs> 650 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 and 6 µm thick, sinuous wall, and surface flat to concave. Short cells: Silica cells of 7–14 × 9–15 µm, more frequent in dorsal area, similar morphology; Cork cells 5–8 × 8–12 µm, oblong to sub-reniform, more frequent in dorsal area. Spines and hairs: Hooks, circular base 10–18 µm, lower density in dorsal area (8–)9–12 hooks/100 µm 2; Prickles absent; Macro-hairs> 600 µm long, of obovate to circular base, located at margin area up to apex. Material studied: Spain: Granada, Granada, Sierra Nevada, Dornajo, 2100 msnm, 7-VI-1991, D. & F. M. Vázquez, HSS003002.