Flora of North America species comparison

thorns abundant;

young twigs yellowish brown-hairy, glabrescent.

young twigs gray-hairy, glabrescent later.

stipules 3–7 mm;

petiole 2–6 mm;

blade elliptic, oblong, or oblong-obovate, 1.5–5 × 1–2 cm, base rounded to cuneate, margins entire or remotely serrulate distally (on vigorous shoots), apex obtuse, apiculate, or aristate, surfaces yellowish brown-hairy, glabrescent (abaxial becoming slightly glaucescent).

stipules 4–8 mm;

petiole 2–5 mm;

blade elliptic or ovate to lanceolate or oblanceolate, 2–4 × 0.7–1.5 cm, base cuneate, margins finely crenulate-serrulate, apex acute, rarely obtuse, abaxial surface slightly hairy when young, glabrescent, adaxial glabrous.

3–4 cm diam.

3–4 cm diam.;

bracteoles in distal axils 4–10 × 3–4 mm.

5–10 mm, yellowish brown-hairy.

3–10 mm, with coarse pale hairs.

8–10 mm diam.;

hypanthium hairy;

calyx brown- or yellowish brown-puberulent when young, glabrescent, sepals broadly elliptic or triangular, 1–1.5 mm, apex obtuse;

petals ovate, 4–5 mm, apex slightly apiculate.

6–8 mm diam.;

hypanthium finely hairy;

sepals triangular, 1.5–2 mm, apex acute;

petals suborbiculate, 3–5 mm, apex rounded.

bright red, 4–7 mm diam.;

pedicels 5–12 mm.

bright red, 5–8 mm diam.;

pedicels 5–12 mm.

= 34 (Europe).