Vitis, Linnaeus, 1753

Ardenghi, Nicola M. G., Galasso, Gabriele, Banfi, Enrico, Zoccola, Antonio, Foggi, Bruno & Lastrucci, Lorenzo, 2014, A taxonomic survey of the genus Vitis L. (Vitaceae) in Italy, with special reference to Elba Island (Tuscan Archipelago), Phytotaxa 166 (3), pp. 163-198 : 198

Vitis × ruggerii

Figs. 3H , 4F , 6G–H , 7F , 18a–f, 18h–j: ITALY. Lombardy: Canneto Pavese (Pavia), SP45, curve between Beria and Casa San Fermo ( WGS84 : 45.048258°N 9.298191°E), 20 August & 7 September 2013, N. Ardenghi, no voucher .

Figs. 4C , 18g: ITALY. Lombardy: Stradella (Pavia), San Zeno ( WGS84 : 45.058888°N 9.306944°E), 7 September 2013, N. Ardenghi, no voucher .

Figures

FIGURE 3. A–H) Abaxial leaf surface pubescence. A) V.vinifera; B) V.labrusca; C) V. riparia; D) V.×koberi; E) V. rupestris; F) V. ×instabilis; G) V. cinerea; H) V.×ruggerii. All photos by Michele Zilioli.

FIGURE 4. A–D) Leaf bases; E–H) leaf margin teeth. A) U-shaped leaf base in V.×instabilis; B) Lyre-shaped leaf base in V.vinifera; C) V-shaped leaf base in V.×ruggerii; D) truncate leaf base in V. rupestris; E, G) acute teeth in V.riparia (E) and in V.×instabilis (G); F, H) obtuse teeth in V ×ruggerii (F) and in V. ×koberi (H).

FIGURE 6. A, C–E, G) Petiole insertion (abaxial surface); B, F, H) petiole insertion detail. A) V. riparia; B–D) V.×instabilis; E–F) V. rupestris; G–H) V.×ruggerii. All photos by Michele Zilioli.

FIGURE 7. A–H) Vein axils (abaxial leaf surface). Tuft of hairs are distinctly visible in (B), (D), (H). A) V. vinifera; B) V. riparia; C–D) V.×instabilis; E) V. rupestris; F) V.×ruggerii; G) V.cinerea; H) V.×koberi. All photos by Michele Zilioli.