Stipellula parviflora var. hoggarensis (Chter & Martinovsky) F.M.Vázquez

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 : 117

Stipellula parviflora var. hoggarensis (Chter & Martinovsky) F.M.Vázquez ( Figure 66 (2)).

Lemma dorsal surface: Characterised by rectangular or quadrangular long cells of (6–)8–24(–34) × 10–14(–16) µm, smooth to undulated walls up to 2 µm thick, linear distribution. Short cells: main Silica cells of (9–)12–18(–22) × 11– 16(–21) µm, circular to ovoid, occasionally elongated up to 28 µm wide, frequently solitary, occasionally in pairs or threes with cork cells, between long cells, density 54–66(–71) silica cells/100 µm 2; Cork cells (2–)5–9(–11) × 12–16(– 18) µm, fusiform to reniform, sporadic, in all cases with a silica cell. Spines and hairs: Hooks not studied; Prickles not studied; Macro-hairs 280–600(–700) µm long, circular base 10–16 µm, irregularly distributed across entire surface.

Lemma apical surface: Characterised by similar long cell morphology, wall characteristics and distribution, length to 75 µm. Short cells: Silica cells equal in size, morphology and distribution, low density up to 34 silica cells/100 µm 2; Cork cells of equal size, morphology, distribution and density. Spines and hairs: Hooks circular to ovoid base (16–)18–26(–28) × 7–9(–10) µm high, regularly distributed in rows, in pairs with silica cells, more frequently solitary, density 6–12 hooks/100 µm 2; Longer prickles circular to ovoid base up to 27 µm, and up to 46 µm long, solitary, distal end of the apex distributed with angulated prickles of lineal base 15–18(–22) × 4–6(–8) µm in the margin; density 10–18 prickles/100 µm 2; Macro-hairs equal size, morphology and distribution, more frequent at distal part of lemma apex, at the apex some Macro-hairs reach 150 µm.

Material studied: Algeria: Hoggar, montis Asekrem, 2600–2700 m.a.s.l., 19-III-1928, R . Maire (nº1330), MPU196599 .

Figures

FIGURE 66. Lemma surface of Stipellula parviflora var. parviflora. (1). Stipellula parviflora var. hoggarensis (2). A. Lemma central dorsal surface view. B. Lemma margin dorsal surface view. C. Lemma apex. D. Lemma together awn base (S. parviflora) or Lemma appendix apex (S. tibestica). lc. Long cell. sc. Silica cell. cc. Cork cell. h. Hook. p. Prickle. ap. Angulated pickle. mh. Macro-hair. Bars indicate 100 µm.