Piptatherum coerulescens P. Beauvois (Beauvois 1812

Piptatherum coerulescens P. Beauv. (Figure 55). Lemma dorsal surface: Characterised by rectangular long cells of (20–)30–90(–110) × (5–)6–8(–10) µm, undulated walls up to 1 µm thick, linear distribution. Short cells: main Silica cells 10–22(–25) × 10–16(–19) µm, circular to elongate, frequent, in pairs with cork cells, situated between long cells, frequently solitary, density 20–28(–31) silica cells/100 µm 2; Cork cells 2–4 × 7–10 µm, fusiform to reniform, sporadic, always with a silica cell. Spines and hairs: Hooks, Prickles, and Macro-hairs not studied. Lemma apical surface: Characterised by long cells similar to those of the dorsal area, no significant differences. Short cells: Silica cells of equal size, morphology and distribution, denser in dorsal area 25–35(–38) silica cells/100 µm 2; Cork cells of equal size, morphology and distribution to those in dorsal area. Spines and hairs: Hooks, Prickles, and Macro-hairs not studied. Awn base surface: Long cells (22–)28–42(–48) × (6–)8–10(–11) µm, extremes rounded to acute, smooth walls up to 1 µm thick, linear distribution. Short cells absent. Spines and hairs: Prickles of two types: Short Prickles of ovoid to circular base 18–24(–26) × 14–19(–21) µm and up to 55 µm long; Long Prickles of ovoid base 26–45(–57) × 18–28(–32) µm and up to 92 µm long, distributed helicoidally. Stomata paracytic (Parallel wall cells type) situated between the prickles in lines 11–20 µm long, density (4–) 9–14(–16) stomata/100 µm 2. Material studied: Morocco: Ben Taieb, 520 m. a.s.l., 5-V-2022, M. Chamboleyron, ECWP n.n.; Missour, Jbel Missour, 1400 m.a.s.l., 6-XII-2015, M. Chamboleyron, ECWP n.n.