Macrochloa gabesensis subsp. kelibiae (Moraldo, Raffaelli & Ricceri) F.M. Vázquez, 2025

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 : 94

Macrochloa gabesensis subsp. kelibiae (Moraldo, Raffaelli & Ricceri) F.M. Vázquez ( Figure 52 (2)).

Lemma dorsal surface (including base): Characterised by long rectangular cells of (25–)50–120(–160) × (8–)10– 18(–20) µm, sinuous walls 5–9 µm thick, linear distribution. Short cells: Silica cells 12–21(–24) × 12–18(–21) µm, circular to ovoid in mid-dorsal area to elongate 21–37(–41) × 12–20(–22) µm at base, frequent, solitary or in pairs with cork, occasionally with hook cells, situated between long cells, density 7–10(–12) silica cells/100 µm 2; Cork cells not studied. Spines and hairs: Hooks ovoid base 20–28(–31) × 7–11(–12) µm high, irregularly distributed between long cells, frequently solitary, sporadically in pairs with silica cells, density <1 hooks/100 µm 2; Prickles ovoid base (20–)24–30(–34) × 19–25(–27) µm, and up to 20 µm long, irregularly distributed between long cells, solitary, density <1 prickle/100 µm 2; Macro-hairs 600–900(–1100) µm long, circular to obovate base 20–25(–27) × 18–20(–22) µm, irregularly distributed across entire surface, denser at base.

Lemma apical surface: Characterised by long cells similar to those of the dorsal area. Short cells: Silica cells of equal size and morphology, distributed solitary, in pairs with cork but not with hook nor prickle cells, at lower density (4–) 5–7 silica cells/100 µm 2 than in dorsal area; Cork cells not studied. Spines and hairs: Hooks of equal size, morphology and frequently with silica cells, denser than in the dorsal area 2–4 hooks/100 µm 2; Prickles similar in base morphology and size than in dorsal area, but longer, up to 50 µm long, distributed at middle of the apex, density> 3 prickles/100 µm 2; Macro-hairs up to 950 µm long, circular to obovate base 18–24(–26) × 16–19(–20) µm, irregularly distributed, more frequent in middle of the apex. Stomata not studied.

Material studied: Morocco: Bouarfa, 0631235/ 3609397, 1300 m.s.a.l., 11-IV-2017, M . Chambouleyron ( ECWP s.n. (HSSrf 154)); Nzala, Irmil, 2020 m.a.s.l., 18-VI-2020, M . Chamboleyron , ECWP n.

Figures

FIGURE 52. Lemma surface Macrochloa gabesensis subsp. gabesensis. (1) and Macrochloa gabesensis subsp. kelibiae (2). A. Lemma central dorsal surface view. B. Lemma margin apex surface view. C. Lemma apex. D. Lemma base surface view. lc. Long cell. sc. Silica cell. cc. Cork cell. h. Hook. p. Prickle. mh. Macro-hair. s. stomata. Bars indicate 100 µm.