Stipa barbata subsp. brevipila (Coss. & Durieu) F.M. Vázquez & Devesa, 1997

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 : 106

Stipa barbata subsp. brevipila (Coss. & Durieu) F.M. Vázquez & Devesa ( Fig. 60 (2)).

Lemma dorsal surface: Characterised by long rectangular cells of (18–)22–40(–43) × 18–21 µm, smooth to thinly undulated walls, 4–7 µm thick, linear distribution. Short cells: main Silica cells of 8–15 × 12–16 µm, circular to oblong, frequently in pairs or threes with cork or hook cells, situated between long cells, never solitary; Cork cells 5–10 × 14–18 µm, sub-elliptic to oblong, sporadic, always with a silica cell. Spines and hairs: Hooks circular to quadrangular base (7–)8–11(–12) × 6–9(–10) µm high, regularly distributed between long cells, in pairs or threes with silica, cork or additional hook cells, frequently solitary, density 9–12 hooks/ 100 µm 2; Macro-hairs 280–550(–700) µm long, circular base 12–15 µm, regularly distributed in lines from mid-dorsal to base of lemma.

Lemma apical surface: Characterised by long cells similar to those of the dorsal area, slightly longer and thinner 27–50(–55) × 8–12(–14) µm. Short cells: Silica cells equal in size, morphology and distribution but less abundant than long cells at the dorsal part; Cork cells equal to those of dorsal area, but occasional. Spines and hairs: Hooks equal in size, distribution, and morphology, denser than in dorsal area (12–14 hooks/100 µm 2); Prickles circular to ovate base 20–22 × 18–23 µm and 20–45(–50) µm long, distributed at upper apex, up to 2 prickles/100 µm 2; Macro-hairs of similar morphology and size, distributed throughout, more frequent at distal part of apex.

Material studied: Morocco: Azilal, Takcat, 1980 m.a.s.l., 9-VI-2021, M. Chamboleyron, ECWP n.n.; )); Enjil, 20-VI-2005, M. Chambouleyron ( ECWP s.n. (HSSrf 201)) .

Figures

FIGURE 60. Lemma surface of Stipa bufensis. (1) and Stipa juncea (2). 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.