Oloptum thomasii Banfi & Galasso 2014

Oloptum thomasii (Duby) Banfi & Galasso (Figure 54 (2)). Lemma dorsal surface: Characterised by rectangular long cells of (20–)30–80 × 8–10(–12) µm, thin, smooth walls up to 1 µm thick, linear distribution. Short cells: main Silica cells (9–)10–14 µm, circular, frequent, occasionally in pairs with cork cells, situated between long cells, frequently solitary, density 18–20(–22) silica cells/100 µm 2; Cork cells (2–)3–7 × 10–12 µm, reniform, sporadic, always with a silica cell. Spines and hairs: Hooks; Prickles; and Hairs (Macro-hairs) not studied. Lemma apical surface: Characterised by similar long cells to those of the dorsal area, no significant differences. Short cells: Silica cells of equal size, morphology, distribution and density; Cork cells of equal size, morphology and distribution to those in the dorsal area. Spines and hairs: Hooks, Prickles or Hairs (Macro-hairs) not studied. Awn base surface: Long cells (8–)12–44(–57) × (6–)7–9(–11) µm, extremes rounded, thin, smooth walls, up to 1 µm thick, linear distribution. No Short cells. 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 to ovoid base 26–45(–57) × 18–28(–32) µm and up to 94 µm long, distributed helicoidally. Stomata paracytic (Parallel wall cells type) between lines of prickles 17–20 µm long, density (4–)7–10(–12) stomata/100 µm 2. Material studied: Spain: Badajoz, Valle de Santa Ana 16-IX-2015, J. Blanco, C. Vila-Viçosa & F. M. Vázquez HSS65193