Stipa letourneuxii var. ignea (F.M. Vázquez) 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 : 110-112

Stipa letourneuxii var. ignea (F.M. Vázquez) F.M.Vázquez. ( Figure 63 (2)).

Lemma dorsal surface: Characterised for rectangular long cells of 20–42(–60) × 18–24 µm, smooth walls up to 10 µm thick, linear distribution. Short cells: main Silica cells 8–12 × 14–19 µm, circular to oblong, sporadic, more frequent at margin, in all cases forming pairs or threes with hook cells, situated between long cells, never solitary; Cork cells not studied. Spines and hairs: Hooks circular base 15–26 × 7–10(–11) µm high, regularly distributed between long cells, in pairs or threes with silica, or additional hook cells, more frequent solitary, density 7–12 hooks/100 µm 2; Prickles not studied; Macro-hairs up to 470 µm long, circular base 18–21 µm, regularly distributed in lines from base to mid-dorsal surface.

Lemma apical surface: Characterised by long cells similar to those of the dorsal area, slightly thinner 8–14 µm. Short cells: Silica cells equal in size and morphology to the dorsal, more frequent; Cork cells 8–10 × 18–20 µm oblong, sporadic, in all cases together with silica and occasionally hook cells. Spines and hairs: Hooks equal in size, and morphology to the dorsal, irregular in distribution and at a higher density 11–14 hooks/100 µm 2; Prickles circular to ovate base, 28–33 × 26–36 µm, 50–120 µm long, distributed in middle and distal parts of apex, up to 3 prickles/100 µm 2; Macro-hairs similar in size and morphology to dorsal, but slightly bigger base 19–27 µm, and shorter macro-hairs up to 180 µm located mostly at distal part of apex.

Material studied: Morocco: Iber, -510240/3284224, 1730 m.s.a.l., 7-VI-2018, M. Chambouleyron ( ECWP s.n. (HSSrf 153)); Jerada, -214586/ 3422094, 920 m.s.a.l., 4-VI-2018, M. Chambouleyron ( ECWP s.n. (HSSrf 148 (1/2/3).

Figures

FIGURE 63. Lemma surface Stipa letourneuxii subsp. letourneuxii (1) Stipa letourneuxii. var. ignea. (2) and Stipa letourneuxii. var. tunetana (3). A. Lemma central dorsal surface view. B. Lemma margin dorsal surface view. C. Lemma apical surface. lc. Long cell. sc. Silica cell. cc. Cork cell. h. Hook. p. Prickle. mh. Macro-hair. Bars indicate 100 µm.