Stipellula nitens (Ball) Röser & Hamasha

Vázquez, Francisco Maria, Márquez, Francisco, García, David & Oualidi, Jalal El, 2025, A taxonomic revision of Stipeae s. l. tribe (Poaceae) in N Africa, Phytotaxa 699 (1), pp. 1-174 : 114

Stipellula nitens (Ball) Röser & Hamasha ( Figure 65 (2)).

Lemma dorsal surface: Characterised by rectangular to quadrangular long cells of (4–) 5–9(–11) × 10–12(–14) µm, smooth to undulated walls, 4–6 µm thick, linear distribution. Short cells: main Silica cells (8–)10–16(–18) × (9–)10– 14(–17) µm, circular to ovoid, frequently solitary, occasionally in pairs or threes with cork cells, between long cells, density 65–78(–82) silica cells/100 µm 2; Cork cells (2–)4–7(–8) × 12–18 µm, fusiform to reniform, sporadic, in all cases with a silica cell. Spines and hairs: Hooks not studied; Prickles not studied; Macro-hairs 500–1200(1450) µm long, circular to obovate base 21–34(–36) × 20–28(–30) µm, irregularly distributed across entire surface.

Lemma apical surface: Characterised by similar long cell morphology, wall characteristics and distribution, length to 32 µm. Short cells: Silica cells equal in size, morphology and distribution, lower density of 41 silica cells/100 µm 2; Cork cells of equal size, morphology, distribution and density. Spines and hairs: Hooks circular to ovoid base 16–22(–26) × 14–20(–25) µm, sporadic, solitary, occasionally with a silica cell, low density <4 hooks/100 µm 2; Prickles obovate to circular base (17–)20–28(–31) × 18–26(–28) µm, and up to 35 µm long, irregularly distributed between long cells, solitary, density <2 prickles/100 µm 2; Macro-hairs equal in size, morphology and distribution, more frequent at distal part of lemma apex.

Material studied: Morocco: Demnate, Marrakech, 2230 m.a.s.l., 10-VI-2021, M . Chamboleyron , ECWP n.n.; Tizi a’Tichka , 2270 m.a.s.l., 30-VI-2020, M . Chamboleyron , ECWP n.n.

Figures

FIGURE 65. Lemma surface Stipellula. capensis. (1) and Stipellula nitens (2). A. Lemma central dorsal surface view. B. Lemma dorsal margin surface view. C. Lemma apex. lc. Long cell. sc. Silica cell. cc. Cork cell. h. Hook. p. Prickle. mh: Macro-hair. Bars indicate 100 µm.