Teucrium barbeyanum Asch. & Taub. ex E.J. Durand & Barratte

Marzouk, Ream I., El-Darier, Salama M. & Askar, Abdelbaset M., 2016, Nutlet micromorphological characters of Teucrium taxa (Lamiaceae) in Libya, Phytotaxa 263 (3), pp. 245-254 : 248

Teucrium barbeyanum Asch. & Taub. ex E.J. Durand & Barratte

The nutlet is dark brown and elliptic (1.02 × 0.54 mm) with a surface moderately covered with non-glandular hairs decreasing towards the abscission scar. Two types of hairs are recognized; the first is short, non-articulate, erect, conical and smooth-surfaced are observed, whereas, in the second type, they are characterized by long, articulate with smooth basal and micro-papillate apical cell. Smooth-surfaced oil glands exist alongside with the hairs, increasing in number towards the abscission scar. The nutlet sculpture is more or less reticulate, however towards the abscission scar; the surface is rugate to ruminate. The abscission scar is elliptic and occupies about 46% of the nutlet length ( Table 2 and Fig. 1, 1 –5).

Teucrium sect. Polium (Mill.) Schreb.

Figures

FIGURE 1. Teucrium nutlets micrographs using SEM. T. barbeyanum, 1–5; T. apollinis, 6–8; T. capitatum, 9–11; T. davaeanum, 12–14; T. lini–vaccarii, 15–17; T. polium, 18–20; T. polium subsp. flavovirens, 21–23; T. zanonii, 24–26; T. brevifolium, 27–31; T. campanulatum, 32–36; T. fruticans, 37–42.